CVE-2026-31459
mm/damon/sysfs: fix param_ctx leak on damon_sysfs_new_test_ctx() failure
Summary
mm/damon/sysfs: fix param_ctx leak on damon_sysfs_new_test_ctx() failure
Original description
The description as published by the source.
In the Linux kernel, the following vulnerability has been resolved:
mm/damon/sysfs: fix param_ctx leak on damon_sysfs_new_test_ctx() failure
Patch series "mm/damon/sysfs: fix memory leak and NULL dereference
issues", v4.
DAMON_SYSFS can leak memory under allocation failure, and do NULL pointer
dereference when a privileged user make wrong sequences of control. Fix
those.
This patch (of 3):
When damon_sysfs_new_test_ctx() fails in damon_sysfs_commit_input(),
param_ctx is leaked because the early return skips the cleanup at the out
label. Destroy param_ctx before returning.
Affected packages
Linux
Kernel
[{"type":"ECOSYSTEM","events":[{"introduced":"6.18.0"},{"fixed":"6.18.21"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.11"}]}]
Fix status by distribution
Fixed packages published by each distribution for this CVE
- BellSoft Alpaquita BELL-CVE-2026-31459 linux-lts Fixed in: 6.18.35-r1
- Debian DEBIAN-CVE-2026-31459 linux Fixed in: 6.19.11-1
- Ubuntu UBUNTU-CVE-2026-31459 linux-hwe-edge
References
- advisory github.com
- advisory nvd.nist.gov
- package git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org