CVE-2026-31459 Details
Description
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.
A vulnerability in the Linux kernel's DAMON subsystem can lead to a memory leak and a NULL pointer dereference. This issue occurs when the 'damon_sysfs_new_test_ctx()' function fails during the 'damon_sysfs_commit_input()' process. In such cases, the 'param_ctx' variable is not properly cleaned up, causing a memory leak. Additionally, a privileged user can exploit this flaw by sending incorrect control sequences, leading to a NULL pointer dereference.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/7fe000eb32904758a85e62f6ea9483f89d5dabfc | kernel.org | Patch |
| https://git.kernel.org/stable/c/e9de9f3ce06b133a348006668bc8d25c6e504867 | kernel.org | Patch |
| https://git.kernel.org/stable/c/f76f0a964bc3d7b7e253b43c669c41356bc54e71 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-401 | Missing Release of Memory after Effective Lifetime | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.18.1, < 6.18.21 >= 6.19, < 6.19.11 6.17.6 6.18 - 6.18 rc3 6.18 rc4 6.18 rc5 6.18 rc6 6.18 rc7 7.0 rc1 7.0 rc2 7.0 rc3 7.0 rc4 7.0 rc5 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 6, 2026 | Reanalysis | [email protected] |
| May 6, 2026 | Initial Analysis | [email protected] |
| Apr 22, 2026 | New CVE Received | kernel.org |