SB20250816180 - openEuler 22.03 LTS SP4 update for kernel

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Memory leak (CVE-ID: CVE-2025-21920)

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

The vulnerability exists due to memory leak within the vlan_check_real_dev() function in net/8021q/vlan.c. A local user can perform a denial of service (DoS) attack.

2) Improper error handling (CVE-ID: CVE-2025-21926)

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

The vulnerability exists due to improper error handling within the __udp_gso_segment() function in net/ipv4/udp_offload.c. A local user can perform a denial of service (DoS) attack.

3) Use-after-free (CVE-ID: CVE-2025-22004)

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

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

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

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.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2025-2006