Memory leak in Linux kernel - CVE-2026-31434
Published: April 24, 2026
Vulnerability identifier: #VU127711
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-31434
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a memory leak in create_space_info_sub_group() and check_removing_space_info() when removing sub-group space_info sysfs objects. A local user can trigger creation and removal of these elements to cause a denial of service.
The issue can be reproduced with the blktests zbd/009 test case on systems built with CONFIG_DEBUG_KMEMLEAK.
How to mitigate CVE-2026-31434
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/1737ddeafbb1304f41ec2eede4f7366082e7c96a
- https://git.kernel.org/stable/c/3c645c6f7e5470debbb81666b230056de48f36dc
- https://git.kernel.org/stable/c/3c844d01f9874a43004c82970d8da94f9aba8949
- https://git.kernel.org/stable/c/416484f21a9d1280cf6daa7ebc10c79b59c46e48
- https://git.kernel.org/stable/c/94054ffd311a1f76b7093ba8ebf50bdb0d28337c
- https://git.kernel.org/stable/c/a4376d9a5d4c9610e69def3fc0b32c86a7ab7a41