SB2026081578 - Improper Check or Handling of Exceptional Conditions in Linux kernel md driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-74374)

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 state handling in the md/raid1 and md/raid10 read request paths when processing split and resubmitted failed bios in the error path. A local user can trigger I/O that causes failed bios to be split and resubmitted to cause a denial of service.

The issue can lead to incorrect memory allocation flags being used under memory pressure, which may result in a deadlock.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/20fb582c92fd64e5c8bd83c6176264b2794603b7
• https://git.kernel.org/stable/c/811545e0926d02a6a0b1a1258bb5544777c164d4