Riskcovery

CVE-2026-31459

mm/damon/sysfs: fix param_ctx leak on damon_sysfs_new_test_ctx() failure

State
Published
Severity
Not scored
Published
Apr 22, 2026
Updated
May 23, 2026
Reserved
Mar 9, 2026

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • f0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f to before e9de9f3ce06b133a348006668bc8d25c6e504867Affected
  • f0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f to before f76f0a964bc3d7b7e253b43c669c41356bc54e71Affected
  • f0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f to before 7fe000eb32904758a85e62f6ea9483f89d5dabfcAffected
  • 5b3609d9b9650bdea0bfdf643e0ce57e1aed67fcAffected
  • 6.17.6 to before 6.18Affected
LinuxLinux
  • 6.18Affected
  • before 6.18Not affected
  • 6.18.21 through 6.18.*Not affected
  • 6.19.11 through 6.19.*Not affected
  • 7.0 and laterNot affected

References

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