SB2026082865 - NULL pointer dereference in Linux kernel erofs

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-80697)

CWE-ID: CWE-476 - NULL Pointer Dereference

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 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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/3879657c4ffd81b9a42cf575fc6cb60201032587
• https://git.kernel.org/stable/c/96b2dbbe58a1ea5df8d29c2fe24b5f04715f4443