NULL pointer dereference in Linux kernel - CVE-2026-80697
Published: August 28, 2026
Vulnerability identifier: #VU146096
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-80697
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in erofs page cache sharing handling when processing mincore requests against backing files with an empty f_path. A local user can trigger the vulnerable code path to cause a denial of service.
The issue occurs because backing files used for page cache sharing were created with only f_inode set while f_path remained NULL.
Affected software
Linux kernel
How to mitigate CVE-2026-80697
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3