SUSE update for the Linux Kernel

Published: 2023-02-23 | Updated: 2024-10-17

Risk	Medium
Patch available	YES
Number of vulnerabilities	6
CVE-ID	CVE-2022-36280 CVE-2022-47929 CVE-2023-0045 CVE-2023-0266 CVE-2023-0590 CVE-2023-23454
CWE-ID	CWE-787 CWE-476 CWE-254 CWE-416 CWE-843
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #3 is available. Vulnerability #4 is being exploited in the wild.
Vulnerable software	SUSE Linux Enterprise Real Time 12 Operating systems & Components / Operating system SUSE Linux Enterprise Server 12 Operating systems & Components / Operating system SUSE Linux Enterprise High Performance Computing 12 Operating systems & Components / Operating system kernel-rt_debug Operating systems & Components / Operating system package or component kernel-rt Operating systems & Components / Operating system package or component kernel-devel-rt Operating systems & Components / Operating system package or component kernel-source-rt Operating systems & Components / Operating system package or component kernel-rt_debug-debugsource Operating systems & Components / Operating system package or component dlm-kmp-rt Operating systems & Components / Operating system package or component kernel-rt-debuginfo Operating systems & Components / Operating system package or component cluster-md-kmp-rt Operating systems & Components / Operating system package or component dlm-kmp-rt-debuginfo Operating systems & Components / Operating system package or component kernel-rt_debug-devel-debuginfo Operating systems & Components / Operating system package or component cluster-md-kmp-rt-debuginfo Operating systems & Components / Operating system package or component ocfs2-kmp-rt-debuginfo Operating systems & Components / Operating system package or component kernel-rt_debug-debuginfo Operating systems & Components / Operating system package or component gfs2-kmp-rt Operating systems & Components / Operating system package or component kernel-rt-devel-debuginfo Operating systems & Components / Operating system package or component kernel-rt-base-debuginfo Operating systems & Components / Operating system package or component kernel-rt_debug-devel Operating systems & Components / Operating system package or component kernel-rt-devel Operating systems & Components / Operating system package or component kernel-syms-rt Operating systems & Components / Operating system package or component gfs2-kmp-rt-debuginfo Operating systems & Components / Operating system package or component kernel-rt-debugsource Operating systems & Components / Operating system package or component kernel-rt-base Operating systems & Components / Operating system package or component ocfs2-kmp-rt Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 6 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU71480

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-2022-36280

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

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the vmw_kms_cursor_snoo() function in drivers/gpu/vmxgfx/vmxgfx_kms.c in vmwgfx VMWare driver. A local user can trigger an out-of-bounds write 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 12: SP5

SUSE Linux Enterprise Server 12: SP5

SUSE Linux Enterprise High Performance Computing 12: SP5

kernel-rt_debug: before 4.12.14-10.115.1

kernel-rt: before 4.12.14-10.115.1

kernel-devel-rt: before 4.12.14-10.115.1

kernel-source-rt: before 4.12.14-10.115.1

kernel-rt_debug-debugsource: before 4.12.14-10.115.1

dlm-kmp-rt: before 4.12.14-10.115.1

kernel-rt-debuginfo: before 4.12.14-10.115.1

cluster-md-kmp-rt: before 4.12.14-10.115.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.115.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.115.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-debuginfo: before 4.12.14-10.115.1

gfs2-kmp-rt: before 4.12.14-10.115.1

kernel-rt-devel-debuginfo: before 4.12.14-10.115.1

kernel-rt-base-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-devel: before 4.12.14-10.115.1

kernel-rt-devel: before 4.12.14-10.115.1

kernel-syms-rt: before 4.12.14-10.115.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt-debugsource: before 4.12.14-10.115.1

kernel-rt-base: before 4.12.14-10.115.1

ocfs2-kmp-rt: before 4.12.14-10.115.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20230485-1/

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) NULL pointer dereference

EUVDB-ID: #VU71479

Risk: Medium

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:Green]

CVE-ID: CVE-2022-47929

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 traffic control subsystem in Linux kernel. A local user can pass pass a specially crafted traffic control configuration that is set up with "tc qdisc" and "tc class" commands 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 12: SP5

SUSE Linux Enterprise Server 12: SP5

SUSE Linux Enterprise High Performance Computing 12: SP5

kernel-rt_debug: before 4.12.14-10.115.1

kernel-rt: before 4.12.14-10.115.1

kernel-devel-rt: before 4.12.14-10.115.1

kernel-source-rt: before 4.12.14-10.115.1

kernel-rt_debug-debugsource: before 4.12.14-10.115.1

dlm-kmp-rt: before 4.12.14-10.115.1

kernel-rt-debuginfo: before 4.12.14-10.115.1

cluster-md-kmp-rt: before 4.12.14-10.115.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.115.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.115.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-debuginfo: before 4.12.14-10.115.1

gfs2-kmp-rt: before 4.12.14-10.115.1

kernel-rt-devel-debuginfo: before 4.12.14-10.115.1

kernel-rt-base-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-devel: before 4.12.14-10.115.1

kernel-rt-devel: before 4.12.14-10.115.1

kernel-syms-rt: before 4.12.14-10.115.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt-debugsource: before 4.12.14-10.115.1

kernel-rt-base: before 4.12.14-10.115.1

ocfs2-kmp-rt: before 4.12.14-10.115.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20230485-1/

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) Security features bypass

EUVDB-ID: #VU72469

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2023-0045

CWE-ID: CWE-254 - Security Features

Exploit availability: Yes

Description

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to Linux kernel does not correctly mitigate SMT attacks. A local user can bypass Spectre-BTI user space mitigations and gain access to sensitive information.

Mitigation

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

Vulnerable software versions

SUSE Linux Enterprise Real Time 12: SP5

SUSE Linux Enterprise Server 12: SP5

SUSE Linux Enterprise High Performance Computing 12: SP5

kernel-rt_debug: before 4.12.14-10.115.1

kernel-rt: before 4.12.14-10.115.1

kernel-devel-rt: before 4.12.14-10.115.1

kernel-source-rt: before 4.12.14-10.115.1

kernel-rt_debug-debugsource: before 4.12.14-10.115.1

dlm-kmp-rt: before 4.12.14-10.115.1

kernel-rt-debuginfo: before 4.12.14-10.115.1

cluster-md-kmp-rt: before 4.12.14-10.115.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.115.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.115.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-debuginfo: before 4.12.14-10.115.1

gfs2-kmp-rt: before 4.12.14-10.115.1

kernel-rt-devel-debuginfo: before 4.12.14-10.115.1

kernel-rt-base-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-devel: before 4.12.14-10.115.1

kernel-rt-devel: before 4.12.14-10.115.1

kernel-syms-rt: before 4.12.14-10.115.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt-debugsource: before 4.12.14-10.115.1

kernel-rt-base: before 4.12.14-10.115.1

ocfs2-kmp-rt: before 4.12.14-10.115.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20230485-1/

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.

4) Use-after-free

EUVDB-ID: #VU71482

Risk: High

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:Amber]

CVE-ID: CVE-2023-0266

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 within the snd_ctl_elem_read() function in the Linux kernel sound subsystem. A local user can trigger a use-after-free error and execute arbitrary code on the system.

Note, the vulnerability is being actively exploited in the wild.

Mitigation

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

Vulnerable software versions

SUSE Linux Enterprise Real Time 12: SP5

SUSE Linux Enterprise Server 12: SP5

SUSE Linux Enterprise High Performance Computing 12: SP5

kernel-rt_debug: before 4.12.14-10.115.1

kernel-rt: before 4.12.14-10.115.1

kernel-devel-rt: before 4.12.14-10.115.1

kernel-source-rt: before 4.12.14-10.115.1

kernel-rt_debug-debugsource: before 4.12.14-10.115.1

dlm-kmp-rt: before 4.12.14-10.115.1

kernel-rt-debuginfo: before 4.12.14-10.115.1

cluster-md-kmp-rt: before 4.12.14-10.115.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.115.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.115.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-debuginfo: before 4.12.14-10.115.1

gfs2-kmp-rt: before 4.12.14-10.115.1

kernel-rt-devel-debuginfo: before 4.12.14-10.115.1

kernel-rt-base-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-devel: before 4.12.14-10.115.1

kernel-rt-devel: before 4.12.14-10.115.1

kernel-syms-rt: before 4.12.14-10.115.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt-debugsource: before 4.12.14-10.115.1

kernel-rt-base: before 4.12.14-10.115.1

ocfs2-kmp-rt: before 4.12.14-10.115.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20230485-1/

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.

5) Use-after-free

EUVDB-ID: #VU72098

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-2023-0590

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error within the qdisc_graft() function in net/sched/sch_api.c. A local user can trigger a use-after-free error and crash the kernel.

Mitigation

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

Vulnerable software versions

SUSE Linux Enterprise Real Time 12: SP5

SUSE Linux Enterprise Server 12: SP5

SUSE Linux Enterprise High Performance Computing 12: SP5

kernel-rt_debug: before 4.12.14-10.115.1

kernel-rt: before 4.12.14-10.115.1

kernel-devel-rt: before 4.12.14-10.115.1

kernel-source-rt: before 4.12.14-10.115.1

kernel-rt_debug-debugsource: before 4.12.14-10.115.1

dlm-kmp-rt: before 4.12.14-10.115.1

kernel-rt-debuginfo: before 4.12.14-10.115.1

cluster-md-kmp-rt: before 4.12.14-10.115.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.115.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.115.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-debuginfo: before 4.12.14-10.115.1

gfs2-kmp-rt: before 4.12.14-10.115.1

kernel-rt-devel-debuginfo: before 4.12.14-10.115.1

kernel-rt-base-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-devel: before 4.12.14-10.115.1

kernel-rt-devel: before 4.12.14-10.115.1

kernel-syms-rt: before 4.12.14-10.115.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt-debugsource: before 4.12.14-10.115.1

kernel-rt-base: before 4.12.14-10.115.1

ocfs2-kmp-rt: before 4.12.14-10.115.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20230485-1/

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) Type Confusion

EUVDB-ID: #VU71478

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-2023-23454

CWE-ID: CWE-843 - Type confusion

Exploit availability: No

Description

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

The vulnerability exists due to a type confusion error within the cbq_classify() function in net/sched/sch_cbq.c in the Linux kernel. A local user can trigger a type confusion error and crash the kernel.

Mitigation

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

Vulnerable software versions

SUSE Linux Enterprise Real Time 12: SP5

SUSE Linux Enterprise Server 12: SP5

SUSE Linux Enterprise High Performance Computing 12: SP5

kernel-rt_debug: before 4.12.14-10.115.1

kernel-rt: before 4.12.14-10.115.1

kernel-devel-rt: before 4.12.14-10.115.1

kernel-source-rt: before 4.12.14-10.115.1

kernel-rt_debug-debugsource: before 4.12.14-10.115.1

dlm-kmp-rt: before 4.12.14-10.115.1

kernel-rt-debuginfo: before 4.12.14-10.115.1

cluster-md-kmp-rt: before 4.12.14-10.115.1

dlm-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-devel-debuginfo: before 4.12.14-10.115.1

cluster-md-kmp-rt-debuginfo: before 4.12.14-10.115.1

ocfs2-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-debuginfo: before 4.12.14-10.115.1

gfs2-kmp-rt: before 4.12.14-10.115.1

kernel-rt-devel-debuginfo: before 4.12.14-10.115.1

kernel-rt-base-debuginfo: before 4.12.14-10.115.1

kernel-rt_debug-devel: before 4.12.14-10.115.1

kernel-rt-devel: before 4.12.14-10.115.1

kernel-syms-rt: before 4.12.14-10.115.1

gfs2-kmp-rt-debuginfo: before 4.12.14-10.115.1

kernel-rt-debugsource: before 4.12.14-10.115.1

kernel-rt-base: before 4.12.14-10.115.1

ocfs2-kmp-rt: before 4.12.14-10.115.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20230485-1/

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.