SB2026092599 - Improper Check or Handling of Exceptional Conditions in Linux kernel bpf

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-93270)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

CVSSv4: 6.8 [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]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper handling of the BPF_MOV64_PERCPU_REG instruction in the BPF interpreter when executing a BPF program containing a BPF_ADDR_PERCPU instruction through interpreter fallback. A local user can trigger execution of the affected instruction to cause a kernel page fault and cause a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/57cf929a33cb76be3f24886073ae820b4c496914
• https://git.kernel.org/stable/c/7a0855e73757ee9cf25ba635a1c735018ecba742