SB20260928115 - Memory leak in Linux kernel btrfs

Description

This security bulletin contains information about 1 vulnerability.

1) Memory leak (CVE-ID: CVE-2026-98082)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper resource cleanup in the Btrfs ordered extent bioc_list when handling ordered extents after errors. A local user can trigger an error while processing an ordered extent to cause a denial of service.

The leak can occur when RAID extent insertion fails or when an ordered extent encounters an I/O error.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1b4d4e890c2c85d0f6365b5a08c48b4bbf85deb0
• https://git.kernel.org/stable/c/83f0c973cffb184d019390ffdb5d31de5c85bc61
• https://git.kernel.org/stable/c/afbe73778338e6d1ac8c4486fbdf33f0cc1f2624
• https://git.kernel.org/stable/c/bb4da45766d16503821f167054db76b735d89e94