SUSE update for the Linux Kernel

Published: 2021-08-10

Risk	Medium
Patch available	YES
Number of vulnerabilities	10
CVE-ID	CVE-2020-0429 CVE-2020-36385 CVE-2020-36386 CVE-2021-22543 CVE-2021-22555 CVE-2021-33909 CVE-2021-3609 CVE-2021-3612 CVE-2021-3659 CVE-2021-37576
CWE-ID	CWE-416 CWE-125 CWE-119 CWE-787 CWE-190 CWE-362 CWE-476
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #4 is available. Vulnerability #5 is being exploited in the wild. Public exploit code for vulnerability #6 is available. Public exploit code for vulnerability #7 is available.
Vulnerable software	SUSE Linux Enterprise Real Time Extension Operating systems & Components / Operating system ocfs2-kmp-rt-debuginfo Operating systems & Components / Operating system package or component ocfs2-kmp-rt Operating systems & Components / Operating system package or component kernel-syms-rt Operating systems & Components / Operating system package or component kernel-rt_debug-devel-debuginfo Operating systems & Components / Operating system package or component kernel-rt_debug-devel Operating systems & Components / Operating system package or component kernel-rt_debug-debugsource Operating systems & Components / Operating system package or component kernel-rt_debug-debuginfo Operating systems & Components / Operating system package or component kernel-rt_debug Operating systems & Components / Operating system package or component kernel-rt-devel-debuginfo Operating systems & Components / Operating system package or component kernel-rt-devel Operating systems & Components / Operating system package or component kernel-rt-debugsource Operating systems & Components / Operating system package or component kernel-rt-debuginfo Operating systems & Components / Operating system package or component kernel-rt-base-debuginfo Operating systems & Components / Operating system package or component kernel-rt-base Operating systems & Components / Operating system package or component kernel-rt Operating systems & Components / Operating system package or component gfs2-kmp-rt-debuginfo Operating systems & Components / Operating system package or component gfs2-kmp-rt Operating systems & Components / Operating system package or component dlm-kmp-rt-debuginfo Operating systems & Components / Operating system package or component dlm-kmp-rt Operating systems & Components / Operating system package or component cluster-md-kmp-rt-debuginfo Operating systems & Components / Operating system package or component cluster-md-kmp-rt Operating systems & Components / Operating system package or component kernel-source-rt Operating systems & Components / Operating system package or component kernel-devel-rt Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 10 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU47047

Risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-0429

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local privileged user to execute arbitrary code.

In l2tp_session_delete and related functions of l2tp_core.c, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-152735806

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Real Time Extension: 12-SP5

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

ocfs2-kmp-rt: before 4.12.14-10.54.1

kernel-syms-rt: before 4.12.14-10.54.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug-devel: before 4.12.14-10.54.1

kernel-rt_debug-debugsource: before 4.12.14-10.54.1

kernel-rt_debug-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug: before 4.12.14-10.54.1

kernel-rt-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt-devel: before 4.12.14-10.54.1

kernel-rt-debugsource: before 4.12.14-10.54.1

kernel-rt-debuginfo: before 4.12.14-10.54.1

kernel-rt-base-debuginfo: before 4.12.14-10.54.1

kernel-rt-base: before 4.12.14-10.54.1

kernel-rt: before 4.12.14-10.54.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

gfs2-kmp-rt: before 4.12.14-10.54.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.54.1

dlm-kmp-rt: before 4.12.14-10.54.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.54.1

cluster-md-kmp-rt: before 4.12.14-10.54.1

kernel-source-rt: before 4.12.14-10.54.1

kernel-devel-rt: before 4.12.14-10.54.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212643-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Use-after-free

EUVDB-ID: #VU58332

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-36385

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in drivers/infiniband/core/ucma.c, because the ctx is reached via the ctx_list in some ucma_migrate_id situations where ucma_close is called. A local user can run a specially crafted program to trigger the use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Real Time Extension: 12-SP5

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

ocfs2-kmp-rt: before 4.12.14-10.54.1

kernel-syms-rt: before 4.12.14-10.54.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug-devel: before 4.12.14-10.54.1

kernel-rt_debug-debugsource: before 4.12.14-10.54.1

kernel-rt_debug-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug: before 4.12.14-10.54.1

kernel-rt-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt-devel: before 4.12.14-10.54.1

kernel-rt-debugsource: before 4.12.14-10.54.1

kernel-rt-debuginfo: before 4.12.14-10.54.1

kernel-rt-base-debuginfo: before 4.12.14-10.54.1

kernel-rt-base: before 4.12.14-10.54.1

kernel-rt: before 4.12.14-10.54.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

gfs2-kmp-rt: before 4.12.14-10.54.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.54.1

dlm-kmp-rt: before 4.12.14-10.54.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.54.1

cluster-md-kmp-rt: before 4.12.14-10.54.1

kernel-source-rt: before 4.12.14-10.54.1

kernel-devel-rt: before 4.12.14-10.54.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212643-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Out-of-bounds read

EUVDB-ID: #VU59125

Risk: Low

CVSSv4.0: 4.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-36386

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a boundary condition within the hci_extended_inquiry_result_evt() function in Linux kernel. A local user can tun a specially crafted program to trigger an out-of-bounds read error and read contents of memory on the system or crash the kernel.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Real Time Extension: 12-SP5

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

ocfs2-kmp-rt: before 4.12.14-10.54.1

kernel-syms-rt: before 4.12.14-10.54.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug-devel: before 4.12.14-10.54.1

kernel-rt_debug-debugsource: before 4.12.14-10.54.1

kernel-rt_debug-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug: before 4.12.14-10.54.1

kernel-rt-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt-devel: before 4.12.14-10.54.1

kernel-rt-debugsource: before 4.12.14-10.54.1

kernel-rt-debuginfo: before 4.12.14-10.54.1

kernel-rt-base-debuginfo: before 4.12.14-10.54.1

kernel-rt-base: before 4.12.14-10.54.1

kernel-rt: before 4.12.14-10.54.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

gfs2-kmp-rt: before 4.12.14-10.54.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.54.1

dlm-kmp-rt: before 4.12.14-10.54.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.54.1

cluster-md-kmp-rt: before 4.12.14-10.54.1

kernel-source-rt: before 4.12.14-10.54.1

kernel-devel-rt: before 4.12.14-10.54.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212643-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Buffer overflow

EUVDB-ID: #VU56018

Risk: Low

CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2021-22543

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in Linux kernel when handling VM_IO|VM_PFNMAP vmas in KVM. A local user can can bypass RO checks and cause the pages to get freed while still accessible by the VMM and guest. As a result, an attacker with the ability to start and control a VM to read/write random pages of memory, can trigger memory corruption and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Real Time Extension: 12-SP5

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

ocfs2-kmp-rt: before 4.12.14-10.54.1

kernel-syms-rt: before 4.12.14-10.54.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug-devel: before 4.12.14-10.54.1

kernel-rt_debug-debugsource: before 4.12.14-10.54.1

kernel-rt_debug-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug: before 4.12.14-10.54.1

kernel-rt-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt-devel: before 4.12.14-10.54.1

kernel-rt-debugsource: before 4.12.14-10.54.1

kernel-rt-debuginfo: before 4.12.14-10.54.1

kernel-rt-base-debuginfo: before 4.12.14-10.54.1

kernel-rt-base: before 4.12.14-10.54.1

kernel-rt: before 4.12.14-10.54.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

gfs2-kmp-rt: before 4.12.14-10.54.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.54.1

dlm-kmp-rt: before 4.12.14-10.54.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.54.1

cluster-md-kmp-rt: before 4.12.14-10.54.1

kernel-source-rt: before 4.12.14-10.54.1

kernel-devel-rt: before 4.12.14-10.54.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212643-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

5) Out-of-bounds write

EUVDB-ID: #VU56017

Risk: Low

CVSSv4.0: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear]

CVE-ID: CVE-2021-22555

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: Yes

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error when processing untrusted input in net/netfilter/x_tables.c in Linux kernel. A local user can run a specially crafted program to trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Real Time Extension: 12-SP5

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

ocfs2-kmp-rt: before 4.12.14-10.54.1

kernel-syms-rt: before 4.12.14-10.54.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug-devel: before 4.12.14-10.54.1

kernel-rt_debug-debugsource: before 4.12.14-10.54.1

kernel-rt_debug-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug: before 4.12.14-10.54.1

kernel-rt-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt-devel: before 4.12.14-10.54.1

kernel-rt-debugsource: before 4.12.14-10.54.1

kernel-rt-debuginfo: before 4.12.14-10.54.1

kernel-rt-base-debuginfo: before 4.12.14-10.54.1

kernel-rt-base: before 4.12.14-10.54.1

kernel-rt: before 4.12.14-10.54.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

gfs2-kmp-rt: before 4.12.14-10.54.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.54.1

dlm-kmp-rt: before 4.12.14-10.54.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.54.1

cluster-md-kmp-rt: before 4.12.14-10.54.1

kernel-source-rt: before 4.12.14-10.54.1

kernel-devel-rt: before 4.12.14-10.54.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212643-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

6) Integer overflow

EUVDB-ID: #VU55143

Risk: Low

CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2021-33909

CWE-ID: CWE-190 - Integer overflow

Exploit availability: Yes

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow during size_t-to-int conversion when creating, mounting, and deleting a deep directory structure whose total path length exceeds 1GB. An unprivileged local user can write up to 10-byte string to an offset of exactly -2GB-10B below the beginning of a vmalloc()ated kernel buffer.

Successful exploitation of vulnerability may allow an attacker to exploit the our-of-bounds write vulnerability to execute arbitrary code with root privileges.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Real Time Extension: 12-SP5

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

ocfs2-kmp-rt: before 4.12.14-10.54.1

kernel-syms-rt: before 4.12.14-10.54.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug-devel: before 4.12.14-10.54.1

kernel-rt_debug-debugsource: before 4.12.14-10.54.1

kernel-rt_debug-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug: before 4.12.14-10.54.1

kernel-rt-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt-devel: before 4.12.14-10.54.1

kernel-rt-debugsource: before 4.12.14-10.54.1

kernel-rt-debuginfo: before 4.12.14-10.54.1

kernel-rt-base-debuginfo: before 4.12.14-10.54.1

kernel-rt-base: before 4.12.14-10.54.1

kernel-rt: before 4.12.14-10.54.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

gfs2-kmp-rt: before 4.12.14-10.54.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.54.1

dlm-kmp-rt: before 4.12.14-10.54.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.54.1

cluster-md-kmp-rt: before 4.12.14-10.54.1

kernel-source-rt: before 4.12.14-10.54.1

kernel-devel-rt: before 4.12.14-10.54.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212643-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

7) Race condition

EUVDB-ID: #VU54292

Risk: Medium

CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2021-3609

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a race condition in the CAN BCM networking protocol (net/can/bcm.c) in the Linux kernel ranging from version 2.6.25 to mainline 5.13-rc6. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Real Time Extension: 12-SP5

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

ocfs2-kmp-rt: before 4.12.14-10.54.1

kernel-syms-rt: before 4.12.14-10.54.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug-devel: before 4.12.14-10.54.1

kernel-rt_debug-debugsource: before 4.12.14-10.54.1

kernel-rt_debug-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug: before 4.12.14-10.54.1

kernel-rt-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt-devel: before 4.12.14-10.54.1

kernel-rt-debugsource: before 4.12.14-10.54.1

kernel-rt-debuginfo: before 4.12.14-10.54.1

kernel-rt-base-debuginfo: before 4.12.14-10.54.1

kernel-rt-base: before 4.12.14-10.54.1

kernel-rt: before 4.12.14-10.54.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

gfs2-kmp-rt: before 4.12.14-10.54.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.54.1

dlm-kmp-rt: before 4.12.14-10.54.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.54.1

cluster-md-kmp-rt: before 4.12.14-10.54.1

kernel-source-rt: before 4.12.14-10.54.1

kernel-devel-rt: before 4.12.14-10.54.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212643-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

8) Out-of-bounds write

EUVDB-ID: #VU55231

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-3612

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in joystick devices subsystem in Linux kernel. A local user can make a specially crafted JSIOCSBTNMAP IOCTL call, trigger out-of-bounds write and execute arbitrary code with escalated privileges.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Real Time Extension: 12-SP5

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

ocfs2-kmp-rt: before 4.12.14-10.54.1

kernel-syms-rt: before 4.12.14-10.54.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug-devel: before 4.12.14-10.54.1

kernel-rt_debug-debugsource: before 4.12.14-10.54.1

kernel-rt_debug-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug: before 4.12.14-10.54.1

kernel-rt-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt-devel: before 4.12.14-10.54.1

kernel-rt-debugsource: before 4.12.14-10.54.1

kernel-rt-debuginfo: before 4.12.14-10.54.1

kernel-rt-base-debuginfo: before 4.12.14-10.54.1

kernel-rt-base: before 4.12.14-10.54.1

kernel-rt: before 4.12.14-10.54.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

gfs2-kmp-rt: before 4.12.14-10.54.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.54.1

dlm-kmp-rt: before 4.12.14-10.54.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.54.1

cluster-md-kmp-rt: before 4.12.14-10.54.1

kernel-source-rt: before 4.12.14-10.54.1

kernel-devel-rt: before 4.12.14-10.54.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212643-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

9) NULL pointer dereference

EUVDB-ID: #VU74547

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-3659

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a local usre to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in the way the user closes the LR-WPAN connection within the IEEE 802.15.4 wireless networking subsystem. A local user can perform a denial of service (DoS) attack.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Real Time Extension: 12-SP5

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

ocfs2-kmp-rt: before 4.12.14-10.54.1

kernel-syms-rt: before 4.12.14-10.54.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug-devel: before 4.12.14-10.54.1

kernel-rt_debug-debugsource: before 4.12.14-10.54.1

kernel-rt_debug-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug: before 4.12.14-10.54.1

kernel-rt-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt-devel: before 4.12.14-10.54.1

kernel-rt-debugsource: before 4.12.14-10.54.1

kernel-rt-debuginfo: before 4.12.14-10.54.1

kernel-rt-base-debuginfo: before 4.12.14-10.54.1

kernel-rt-base: before 4.12.14-10.54.1

kernel-rt: before 4.12.14-10.54.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

gfs2-kmp-rt: before 4.12.14-10.54.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.54.1

dlm-kmp-rt: before 4.12.14-10.54.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.54.1

cluster-md-kmp-rt: before 4.12.14-10.54.1

kernel-source-rt: before 4.12.14-10.54.1

kernel-devel-rt: before 4.12.14-10.54.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212643-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

10) Out-of-bounds write

EUVDB-ID: #VU57101

Risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-37576

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote user to escalate privileges on the system.

The vulnerability exists due to a boundary error in arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform. An attacker on KVM guest OS can cause host OS memory corruption via rtas_args.nargs and execute arbitrary code on the host OS.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Real Time Extension: 12-SP5

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

ocfs2-kmp-rt: before 4.12.14-10.54.1

kernel-syms-rt: before 4.12.14-10.54.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug-devel: before 4.12.14-10.54.1

kernel-rt_debug-debugsource: before 4.12.14-10.54.1

kernel-rt_debug-debuginfo: before 4.12.14-10.54.1

kernel-rt_debug: before 4.12.14-10.54.1

kernel-rt-devel-debuginfo: before 4.12.14-10.54.1

kernel-rt-devel: before 4.12.14-10.54.1

kernel-rt-debugsource: before 4.12.14-10.54.1

kernel-rt-debuginfo: before 4.12.14-10.54.1

kernel-rt-base-debuginfo: before 4.12.14-10.54.1

kernel-rt-base: before 4.12.14-10.54.1

kernel-rt: before 4.12.14-10.54.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.54.1

gfs2-kmp-rt: before 4.12.14-10.54.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.54.1

dlm-kmp-rt: before 4.12.14-10.54.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.54.1

cluster-md-kmp-rt: before 4.12.14-10.54.1

kernel-source-rt: before 4.12.14-10.54.1

kernel-devel-rt: before 4.12.14-10.54.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212643-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.