CVE-2026-31459

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinuxf0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f < e9de9f3ce06b133a348006668bc8d25c6e504867affected
LinuxLinuxf0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f < f76f0a964bc3d7b7e253b43c669c41356bc54e71affected
LinuxLinuxf0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f < 7fe000eb32904758a85e62f6ea9483f89d5dabfcaffected
LinuxLinux5b3609d9b9650bdea0bfdf643e0ce57e1aed67fcaffected
LinuxLinux6.17.6 < 6.18affected
LinuxLinux6.18affected
LinuxLinux0 < 6.18unaffected
LinuxLinux6.18.21 <= 6.18.*unaffected
LinuxLinux6.19.11 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References