SB20260216160 - SUSE update for the Linux Kernel (Live Patch 12 for SUSE Linux Enterprise 15 SP6)

Description

This security bulletin contains information about 5 vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2025-38111)

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

CVSSv4: 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

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

The vulnerability exists due to an out-of-bounds read error within the __mdiobus_read() and __mdiobus_write() functions in drivers/net/phy/mdio_bus.c. A local user can perform a denial of service (DoS) attack.

2) Race condition (CVE-ID: CVE-2025-38352)

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

CVSSv4: 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

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

The vulnerability exists due to a race condition within the run_posix_cpu_timers() function in kernel/time/posix-cpu-timers.c. A local user can escalate privileges on the system.

Note, the vulnerability is being actively exploited in the wild against Android devices.

3) Division by zero (CVE-ID: CVE-2025-39742)

CWE-ID: CWE-369 - Divide By Zero

CVSSv4: 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

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

The vulnerability exists due to a division by zero error within the find_hw_thread_mask() function in drivers/infiniband/hw/hfi1/affinity.c. A local user can perform a denial of service (DoS) attack.

4) NULL pointer dereference (CVE-ID: CVE-2025-40129)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 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

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

The vulnerability exists due to NULL pointer dereference within the svcauth_gss_verify_header() function in net/sunrpc/auth_gss/svcauth_gss.c. A local user can perform a denial of service (DoS) attack.

5) Use-after-free (CVE-ID: CVE-2025-40186)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 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

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

The vulnerability exists due to a use-after-free error within the tcp_conn_request() function in net/ipv4/tcp_input.c. A local user can escalate privileges on the system.

Remediation

Install update from vendor's website.

References

• https://www.suse.com/support/update/announcement/2026/suse-su-20260548-1/