SB20260425116 - Improper Check for Unusual or Exceptional Conditions in Linux kernel arm64 mm

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2026-31600)

CWE-ID: CWE-754 - Improper Check for Unusual or 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 invalid large leaf mappings in arm64 memory management code when processing invalid page table entries in the linear map. A local user can trigger access to memory backed by an invalid large leaf mapping to cause a denial of service.

The issue can result in a kernel panic during affected memory-mapping operations.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/747b6482e4e227fd351197dde6f64a97107a9e52
• https://git.kernel.org/stable/c/8140b21d19015227a28c255404462f2d3e6edc9a
• https://git.kernel.org/stable/c/cbea627ea634f41c79d18f0c6d20db66fa93514c