CVE-2026-31459

Estado: AnalizadaMedia (5.5)—

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

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 5.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.16%
Percentil entre todas las CVEs puntuadas: 5
Fecha de la puntuación: 5/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-401

Referencias

JSON original (NVD)

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/sysfs: fix param_ctx leak on damon_sysfs_new_test_ctx() failure\n\nPatch series \"mm/damon/sysfs: fix memory leak and NULL dereference\nissues\", v4.\n\nDAMON_SYSFS can leak memory under allocation failure, and do NULL pointer\ndereference when a privileged user make wrong sequences of control.  Fix\nthose.\n\n\nThis patch (of 3):\n\nWhen damon_sysfs_new_test_ctx() fails in damon_sysfs_commit_input(),\nparam_ctx is leaked because the early return skips the cleanup at the out\nlabel.  Destroy param_ctx before returning."
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