SB20260928386 - Use of Uninitialized Variable in Linux kernel xfs libxfs

Description

This security bulletin contains information about 1 vulnerability.

1) Use of Uninitialized Variable (CVE-ID: CVE-2026-97552)

CWE-ID: CWE-457 - Use of Uninitialized Variable

CVSSv4: 1.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

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

The vulnerability exists due to use of an uninitialized variable in xfs_defer_finish_one() when processing an item-less pending item during an online repair. A local privileged user can trigger processing of an item-less pending item during an online repair to cause a denial of service.

Only kernels built with CONFIG_XFS_ONLINE_REPAIR are affected.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/30748a24b9f04f9a83599ba907cc8fbff0729f3c
• https://git.kernel.org/stable/c/6176d21d7bd609632c5b7e87a3adb9be29ec1e72
• https://git.kernel.org/stable/c/6b507c239884f7d4bf8339f6e9eb8bfcb540afde
• https://git.kernel.org/stable/c/ba949a14446b7346e92e676ee3fe2bb79d9ce450