SB20260528143 - Improper Check or Handling of Exceptional Conditions in Linux kernel btrfs

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-45934)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

CVSSv4: 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/E:U/U:Clear

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

The vulnerability exists due to improper handling of non-consecutive gaps in chunk allocation in btrfs_create_pending_block_groups() when processing DUP chunk allocation. A local user can trigger chunk allocation to cause a denial of service.

The issue can result in a transaction abort with EEXIST due to overlapping chunk maps, and forced chunk allocation is a demonstrated trigger.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/156cac365e27a82b64ae510c5f463fd81f0265b1
• https://git.kernel.org/stable/c/7d4eadee7042d27fcea659fcdd738f463a7d2e70
• https://git.kernel.org/stable/c/b14c5e04bd0f722ed631845599d52d03fcae1bc1