Medium 5.5Published Apr 22, 2026

CVE-2026-31459mm/damon/sysfs: fix param_ctx leak on damon_sysfs_new_test_ctx() failure

Updated under an hour ago (Oct 27, 2026, 5:50 AM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from f0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f before e9de9f3ce06b133a348006668bc8d25c6e504867; from f0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f before f76f0a964bc3d7b7e253b43c669c41356bc54e71; from f0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f before 7fe000eb32904758a85e62f6ea9483f89d5dabfc; 5b3609d9b9650bdea0bfdf643e0ce57e1aed67fc; from 6.17.6 before 6.18	CNA record
linux linux_kernel linux:linux_kernel	from 6.18.1 before 6.18.21; from 6.19 before 6.19.11; 6.17.6; 6.18; 6.18; 6.18; 6.18; 6.18; and 6 more ranges	NVD

References

References

https://git.kernel.org/stable/c/e9de9f3ce06b133a348006668bc8d25c6e504867	patch
https://git.kernel.org/stable/c/f76f0a964bc3d7b7e253b43c669c41356bc54e71	patch
https://git.kernel.org/stable/c/7fe000eb32904758a85e62f6ea9483f89d5dabfc	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.