SB20261015163 - Incorrect calculation in Linux kernel xfs scrub

Description

This security bulletin contains information about 1 vulnerability.

1) Incorrect calculation (CVE-ID: CVE-2026-97550)

CWE-ID: CWE-682 - Incorrect Calculation

CVSSv4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause incorrect accounting of buffer invalidation log space.

The vulnerability exists due to an incorrect unit conversion in the XFS per_binval computation when calculating buffer invalidation overhead. A local user can trigger the affected calculations to cause incorrect accounting of buffer invalidation log space.

The second parameter of xfs_buf_inval_log_space expects bytes, but max_binval is expressed in filesystem blocks.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/05cff7c2b79f76c7cfe90613a60e16aaaa051ef7
• https://git.kernel.org/stable/c/b5089a328acc83fe2f23127a79397a0bfd9ebc33
• https://git.kernel.org/stable/c/cfeba3bdf4dfa405e29f4ee13a20e9063fd0b7ef