Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-80881
Published: September 5, 2026
Vulnerability identifier: #VU147036
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80881
CWE-ID: CWE-754
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause OCFS2 to process metadata that previously failed validation.
The vulnerability exists due to improper handling of validation failures in ocfs2_read_blocks() when reusing buffer heads returned by sb_getblk(). A local user can trigger reuse of buffer heads retaining BH_Uptodate status after failed validation to cause OCFS2 to process metadata that previously failed validation.
Affected software
Linux kernel
How to mitigate CVE-2026-80881
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/0e389fc290c350c67591abf4c367119f4689f310
- https://git.kernel.org/stable/c/4ab17e328522a4df5fe0f0dcf39098118b1feeaa
- https://git.kernel.org/stable/c/5927acb3e2c99985a14adecd9d1b67ba191c622d
- https://git.kernel.org/stable/c/61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766
- https://git.kernel.org/stable/c/6371a07148ee979af22a9d6f4c277462953a9a4a
- https://git.kernel.org/stable/c/9e7a057934cdd58e4cc94350bcfe5367bbee0f8e
- https://git.kernel.org/stable/c/a4eae1499c760949a93459d11390bd1fd823d31d
- https://git.kernel.org/stable/c/ecb3f9386f4353034caef77239473c627232db17