SB2026070272 - Improper Check or Handling of Exceptional Conditions in Linux kernel mm

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-53333)

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

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

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

The vulnerability exists due to improper handling of non-swap entries in mincore_swap() in mm/mincore.c when processing migration, hwpoison, or shmem swapin-error entries on kernels built without swap support. A local user can trigger mincore page table handling of such entries to cause a denial of service.

Only kernels built without swap support are affected, and the issue can arise when migration or memory failure related features are enabled.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0c25b8734367574e21aeb8468c2e522713134da7
• https://git.kernel.org/stable/c/3481d4372ae34243f7025925314385b852c50f7e
• https://git.kernel.org/stable/c/a8f91ddf67f669f547bb9fb559738da6f8ee2cf3