SB2026102215 - Improper handling of exceptional conditions in Linux kernel xfs scrub

Description

This security bulletin contains information about 1 vulnerability.

1) Improper handling of exceptional conditions (CVE-ID: CVE-2026-98445)

CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to potentially cause a denial of service through leaked filesystem blocks or filesystem shutdown.

The vulnerability exists due to improper handling of memory allocation failures in the XFS xrep_newbt_add_blocks function when allocating a reservation object during online filesystem repair. A local user can potentially trigger an allocation failure to leave blocks allocated for a new btree unreleased or cause the filesystem to shut down because the callers cannot both undo the transaction and return an error.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0e0d3372a84029da1768c7a4c4601484af5b58a2
• https://git.kernel.org/stable/c/3380151cf0ce8ad0c1d356fed51e4b69e1d28e50
• https://git.kernel.org/stable/c/ab1c416d2377cdc16123ef521aac4da1c468c3d4
• https://git.kernel.org/stable/c/b15c79fca28060fd9c7e77f2c3ebc4ba023974e8