CVE-2026-43338
kernel: btrfs: reserve enough transaction items for qgroup ioctls
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 8, 2026
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel's Btrfs filesystem. The qgroup ioctls (input/output control system calls for quota groups) do not reserve sufficient transaction space. A local user can exploit this by performing specific qgroup operations, which can lead to a transaction abort and result in a Denial of Service (DoS) condition.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-770 · Allocation of Resources Without Limits or Throttling