SUSE update for the Linux Kernel

Published: 2022-08-29 | Updated: 2023-06-08

Risk	Medium
Patch available	YES
Number of vulnerabilities	10
CVE-ID	CVE-2020-36516 CVE-2020-36557 CVE-2020-36558 CVE-2021-33655 CVE-2021-33656 CVE-2022-1462 CVE-2022-20166 CVE-2022-2639 CVE-2022-29581 CVE-2022-36946
CWE-ID	CWE-327 CWE-362 CWE-476 CWE-787 CWE-125 CWE-264 CWE-191 CWE-911 CWE-20
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #8 is available. Public exploit code for vulnerability #10 is available.
Vulnerable software	SUSE Linux Enterprise Real Time Extension Operating systems & Components / Operating system kernel-source-rt Operating systems & Components / Operating system package or component kernel-devel-rt Operating systems & Components / Operating system package or component 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
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 10 vulnerabilities.

1) Use of a broken or risky cryptographic algorithm

EUVDB-ID: #VU66811

Risk: Medium

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-36516

CWE-ID: CWE-327 - Use of a Broken or Risky Cryptographic Algorithm

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) or MitM attacks.

The vulnerability exists due to an error in the mixed IPID assignment method with the hash-based IPID assignment policy in Linux kernel. A remote attacker can inject data into a victim's TCP session or terminate that session.

Mitigation

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

Vulnerable software versions

SUSE Linux Enterprise Real Time Extension: 12-SP5

kernel-source-rt: before 4.12.14-10.97.1

kernel-devel-rt: before 4.12.14-10.97.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

ocfs2-kmp-rt: before 4.12.14-10.97.1

kernel-syms-rt: before 4.12.14-10.97.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug-devel: before 4.12.14-10.97.1

kernel-rt_debug-debugsource: before 4.12.14-10.97.1

kernel-rt_debug-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug: before 4.12.14-10.97.1

kernel-rt-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt-devel: before 4.12.14-10.97.1

kernel-rt-debugsource: before 4.12.14-10.97.1

kernel-rt-debuginfo: before 4.12.14-10.97.1

kernel-rt-base-debuginfo: before 4.12.14-10.97.1

kernel-rt-base: before 4.12.14-10.97.1

kernel-rt: before 4.12.14-10.97.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

gfs2-kmp-rt: before 4.12.14-10.97.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.97.1

dlm-kmp-rt: before 4.12.14-10.97.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.97.1

cluster-md-kmp-rt: before 4.12.14-10.97.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20222910-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Race condition

EUVDB-ID: #VU66588

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-2020-36557

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 between the VT_DISALLOCATE IOCTL and closing/opening of ttys. 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

kernel-source-rt: before 4.12.14-10.97.1

kernel-devel-rt: before 4.12.14-10.97.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

ocfs2-kmp-rt: before 4.12.14-10.97.1

kernel-syms-rt: before 4.12.14-10.97.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug-devel: before 4.12.14-10.97.1

kernel-rt_debug-debugsource: before 4.12.14-10.97.1

kernel-rt_debug-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug: before 4.12.14-10.97.1

kernel-rt-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt-devel: before 4.12.14-10.97.1

kernel-rt-debugsource: before 4.12.14-10.97.1

kernel-rt-debuginfo: before 4.12.14-10.97.1

kernel-rt-base-debuginfo: before 4.12.14-10.97.1

kernel-rt-base: before 4.12.14-10.97.1

kernel-rt: before 4.12.14-10.97.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

gfs2-kmp-rt: before 4.12.14-10.97.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.97.1

dlm-kmp-rt: before 4.12.14-10.97.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.97.1

cluster-md-kmp-rt: before 4.12.14-10.97.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20222910-1/

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) NULL pointer dereference

EUVDB-ID: #VU66589

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-2020-36558

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error in the Linux kernel before 5.5.7 involving a VT_RESIZEX. 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

kernel-source-rt: before 4.12.14-10.97.1

kernel-devel-rt: before 4.12.14-10.97.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

ocfs2-kmp-rt: before 4.12.14-10.97.1

kernel-syms-rt: before 4.12.14-10.97.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug-devel: before 4.12.14-10.97.1

kernel-rt_debug-debugsource: before 4.12.14-10.97.1

kernel-rt_debug-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug: before 4.12.14-10.97.1

kernel-rt-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt-devel: before 4.12.14-10.97.1

kernel-rt-debugsource: before 4.12.14-10.97.1

kernel-rt-debuginfo: before 4.12.14-10.97.1

kernel-rt-base-debuginfo: before 4.12.14-10.97.1

kernel-rt-base: before 4.12.14-10.97.1

kernel-rt: before 4.12.14-10.97.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

gfs2-kmp-rt: before 4.12.14-10.97.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.97.1

dlm-kmp-rt: before 4.12.14-10.97.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.97.1

cluster-md-kmp-rt: before 4.12.14-10.97.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20222910-1/

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) Out-of-bounds write

EUVDB-ID: #VU65833

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-2021-33655

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 FBIOPUT_VSCREENINFO IOCTL. A local user can trigger an out-of-bounds write 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

kernel-source-rt: before 4.12.14-10.97.1

kernel-devel-rt: before 4.12.14-10.97.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

ocfs2-kmp-rt: before 4.12.14-10.97.1

kernel-syms-rt: before 4.12.14-10.97.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug-devel: before 4.12.14-10.97.1

kernel-rt_debug-debugsource: before 4.12.14-10.97.1

kernel-rt_debug-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug: before 4.12.14-10.97.1

kernel-rt-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt-devel: before 4.12.14-10.97.1

kernel-rt-debugsource: before 4.12.14-10.97.1

kernel-rt-debuginfo: before 4.12.14-10.97.1

kernel-rt-base-debuginfo: before 4.12.14-10.97.1

kernel-rt-base: before 4.12.14-10.97.1

kernel-rt: before 4.12.14-10.97.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

gfs2-kmp-rt: before 4.12.14-10.97.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.97.1

dlm-kmp-rt: before 4.12.14-10.97.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.97.1

cluster-md-kmp-rt: before 4.12.14-10.97.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20222910-1/

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.

5) Out-of-bounds write

EUVDB-ID: #VU66590

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-2021-33656

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 when setting font with malicous data by ioctl cmd PIO_FONT. A local user can 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

kernel-source-rt: before 4.12.14-10.97.1

kernel-devel-rt: before 4.12.14-10.97.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

ocfs2-kmp-rt: before 4.12.14-10.97.1

kernel-syms-rt: before 4.12.14-10.97.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug-devel: before 4.12.14-10.97.1

kernel-rt_debug-debugsource: before 4.12.14-10.97.1

kernel-rt_debug-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug: before 4.12.14-10.97.1

kernel-rt-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt-devel: before 4.12.14-10.97.1

kernel-rt-debugsource: before 4.12.14-10.97.1

kernel-rt-debuginfo: before 4.12.14-10.97.1

kernel-rt-base-debuginfo: before 4.12.14-10.97.1

kernel-rt-base: before 4.12.14-10.97.1

kernel-rt: before 4.12.14-10.97.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

gfs2-kmp-rt: before 4.12.14-10.97.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.97.1

dlm-kmp-rt: before 4.12.14-10.97.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.97.1

cluster-md-kmp-rt: before 4.12.14-10.97.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20222910-1/

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.

6) Out-of-bounds read

EUVDB-ID: #VU66591

Risk: Low

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

CVE-ID: CVE-2022-1462

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

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition within the the Linux kernel’s TeleTYpe subsystem caused by a race condition when using ioctls TIOCSPTLCK and TIOCGPTPEER and TIOCSTI and TCXONC with leakage of memory file. A local user can trigger an out-of-bounds read error and crash the system or read random kernel memory.

Mitigation

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

Vulnerable software versions

SUSE Linux Enterprise Real Time Extension: 12-SP5

kernel-source-rt: before 4.12.14-10.97.1

kernel-devel-rt: before 4.12.14-10.97.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

ocfs2-kmp-rt: before 4.12.14-10.97.1

kernel-syms-rt: before 4.12.14-10.97.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug-devel: before 4.12.14-10.97.1

kernel-rt_debug-debugsource: before 4.12.14-10.97.1

kernel-rt_debug-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug: before 4.12.14-10.97.1

kernel-rt-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt-devel: before 4.12.14-10.97.1

kernel-rt-debugsource: before 4.12.14-10.97.1

kernel-rt-debuginfo: before 4.12.14-10.97.1

kernel-rt-base-debuginfo: before 4.12.14-10.97.1

kernel-rt-base: before 4.12.14-10.97.1

kernel-rt: before 4.12.14-10.97.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

gfs2-kmp-rt: before 4.12.14-10.97.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.97.1

dlm-kmp-rt: before 4.12.14-10.97.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.97.1

cluster-md-kmp-rt: before 4.12.14-10.97.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20222910-1/

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.

7) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU64208

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-2022-20166

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The vulnerability exists due to unspecified error in the Linux Kernel. A local user can bypass security restrictions 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

kernel-source-rt: before 4.12.14-10.97.1

kernel-devel-rt: before 4.12.14-10.97.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

ocfs2-kmp-rt: before 4.12.14-10.97.1

kernel-syms-rt: before 4.12.14-10.97.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug-devel: before 4.12.14-10.97.1

kernel-rt_debug-debugsource: before 4.12.14-10.97.1

kernel-rt_debug-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug: before 4.12.14-10.97.1

kernel-rt-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt-devel: before 4.12.14-10.97.1

kernel-rt-debugsource: before 4.12.14-10.97.1

kernel-rt-debuginfo: before 4.12.14-10.97.1

kernel-rt-base-debuginfo: before 4.12.14-10.97.1

kernel-rt-base: before 4.12.14-10.97.1

kernel-rt: before 4.12.14-10.97.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

gfs2-kmp-rt: before 4.12.14-10.97.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.97.1

dlm-kmp-rt: before 4.12.14-10.97.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.97.1

cluster-md-kmp-rt: before 4.12.14-10.97.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20222910-1/

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.

8) Integer underflow

EUVDB-ID: #VU66812

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-2022-2639

CWE-ID: CWE-191 - Integer underflow

Exploit availability: Yes

Description

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

The vulnerability exists due to integer underflow within the reserve_sfa_size() function in the openvswitch kernel module in Linux kernel. A local user can trigger an out-of-bounds read error and crash the system or escalate privileges.

Mitigation

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

Vulnerable software versions

SUSE Linux Enterprise Real Time Extension: 12-SP5

kernel-source-rt: before 4.12.14-10.97.1

kernel-devel-rt: before 4.12.14-10.97.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

ocfs2-kmp-rt: before 4.12.14-10.97.1

kernel-syms-rt: before 4.12.14-10.97.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug-devel: before 4.12.14-10.97.1

kernel-rt_debug-debugsource: before 4.12.14-10.97.1

kernel-rt_debug-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug: before 4.12.14-10.97.1

kernel-rt-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt-devel: before 4.12.14-10.97.1

kernel-rt-debugsource: before 4.12.14-10.97.1

kernel-rt-debuginfo: before 4.12.14-10.97.1

kernel-rt-base-debuginfo: before 4.12.14-10.97.1

kernel-rt-base: before 4.12.14-10.97.1

kernel-rt: before 4.12.14-10.97.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

gfs2-kmp-rt: before 4.12.14-10.97.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.97.1

dlm-kmp-rt: before 4.12.14-10.97.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.97.1

cluster-md-kmp-rt: before 4.12.14-10.97.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20222910-1/

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.

9) Improper update of reference count

EUVDB-ID: #VU63496

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-2022-29581

CWE-ID: CWE-911 - Improper Update of Reference Count

Exploit availability: No

Description

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

The vulnerability exists due to improper update of reference count in net/sched in Linux kernel. A local user can 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

kernel-source-rt: before 4.12.14-10.97.1

kernel-devel-rt: before 4.12.14-10.97.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

ocfs2-kmp-rt: before 4.12.14-10.97.1

kernel-syms-rt: before 4.12.14-10.97.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug-devel: before 4.12.14-10.97.1

kernel-rt_debug-debugsource: before 4.12.14-10.97.1

kernel-rt_debug-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug: before 4.12.14-10.97.1

kernel-rt-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt-devel: before 4.12.14-10.97.1

kernel-rt-debugsource: before 4.12.14-10.97.1

kernel-rt-debuginfo: before 4.12.14-10.97.1

kernel-rt-base-debuginfo: before 4.12.14-10.97.1

kernel-rt-base: before 4.12.14-10.97.1

kernel-rt: before 4.12.14-10.97.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

gfs2-kmp-rt: before 4.12.14-10.97.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.97.1

dlm-kmp-rt: before 4.12.14-10.97.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.97.1

cluster-md-kmp-rt: before 4.12.14-10.97.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20222910-1/

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) Input validation error

EUVDB-ID: #VU66476

Risk: Medium

CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2022-36946

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input within the nfqnl_mangle() function in net/netfilter/nfnetlink_queue.c in the Linux kernel when processing IPv6 packets. A remote attacker can send specially crafted packets to the system and 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

kernel-source-rt: before 4.12.14-10.97.1

kernel-devel-rt: before 4.12.14-10.97.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

ocfs2-kmp-rt: before 4.12.14-10.97.1

kernel-syms-rt: before 4.12.14-10.97.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug-devel: before 4.12.14-10.97.1

kernel-rt_debug-debugsource: before 4.12.14-10.97.1

kernel-rt_debug-debuginfo: before 4.12.14-10.97.1

kernel-rt_debug: before 4.12.14-10.97.1

kernel-rt-devel-debuginfo: before 4.12.14-10.97.1

kernel-rt-devel: before 4.12.14-10.97.1

kernel-rt-debugsource: before 4.12.14-10.97.1

kernel-rt-debuginfo: before 4.12.14-10.97.1

kernel-rt-base-debuginfo: before 4.12.14-10.97.1

kernel-rt-base: before 4.12.14-10.97.1

kernel-rt: before 4.12.14-10.97.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.97.1

gfs2-kmp-rt: before 4.12.14-10.97.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.97.1

dlm-kmp-rt: before 4.12.14-10.97.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.97.1

cluster-md-kmp-rt: before 4.12.14-10.97.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20222910-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

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.