SB20260424205 - Improper Check or Handling of Exceptional Conditions in Linux kernel erofs

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-31514)

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 short read errors in erofs file-backed mount I/O handling when processing interrupted read operations. A local user can trigger a read operation that is interrupted by a signal to cause a denial of service.

The issue occurs because unused folios in a bio can be incorrectly marked as uptodate after a short read.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/5a5f23ef5431639db1ac3a0b274aef3a84cc413c
• https://git.kernel.org/stable/c/5cf3972c8221abdb1b464a14ccf8103d840b9085
• https://git.kernel.org/stable/c/d1ba7d6b3cd1757b108d7b6856c92ae661d6c323
• https://git.kernel.org/stable/c/eade54040384f54b7fb330e4b0975c5734850b3c