CVE-2026-43393
kernel: btrfs: fix chunk map leak in btrfs_map_block() after btrfs_chunk_map_num_copies()
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 file system. This vulnerability, a memory leak, occurs in the btrfs_map_block() function. When an early error return (-EINVAL) happens, the allocated chunk map is not properly freed, leading to a resource leak. This can potentially lead to system instability or a Denial of Service (DoS) condition due to memory exhaustion.
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-772 · Missing Release of Resource after Effective Lifetime