Vulnerability-Lookup

GHSA-6C8G-Q98P-W229

Vulnerability from github – Published: 2026-04-22 15:31 – Updated: 2026-04-22 15:31

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31459"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-22T14:16:41Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-6c8g-q98p-w229",
  "modified": "2026-04-22T15:31:41Z",
  "published": "2026-04-22T15:31:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31459"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7fe000eb32904758a85e62f6ea9483f89d5dabfc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e9de9f3ce06b133a348006668bc8d25c6e504867"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f76f0a964bc3d7b7e253b43c669c41356bc54e71"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-31459 (GCVE-0-2026-31459)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:53 – Updated: 2026-04-22 13:53

Title

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

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.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/e9de9f3ce06b133a3…
	https://git.kernel.org/stable/c/f76f0a964bc3d7b7e…
	https://git.kernel.org/stable/c/7fe000eb32904758a…

Impacted products

Vendor

Product

Version

Linux

Affected: f0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f , < e9de9f3ce06b133a348006668bc8d25c6e504867 (git)
Affected: f0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f , < f76f0a964bc3d7b7e253b43c669c41356bc54e71 (git)
Affected: f0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f , < 7fe000eb32904758a85e62f6ea9483f89d5dabfc (git)
Affected: 5b3609d9b9650bdea0bfdf643e0ce57e1aed67fc (git)

Linux

Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/damon/sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e9de9f3ce06b133a348006668bc8d25c6e504867",
              "status": "affected",
              "version": "f0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f",
              "versionType": "git"
            },
            {
              "lessThan": "f76f0a964bc3d7b7e253b43c669c41356bc54e71",
              "status": "affected",
              "version": "f0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f",
              "versionType": "git"
            },
            {
              "lessThan": "7fe000eb32904758a85e62f6ea9483f89d5dabfc",
              "status": "affected",
              "version": "f0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5b3609d9b9650bdea0bfdf643e0ce57e1aed67fc",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "mm/damon/sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.18.21",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.19.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.21",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                },
                {
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                  "versionStartIncluding": "6.17.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-22T13:53:51.554Z",
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        },
        {
          "url": "https://git.kernel.org/stable/c/7fe000eb32904758a85e62f6ea9483f89d5dabfc"
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      ],
      "title": "mm/damon/sysfs: fix param_ctx leak on damon_sysfs_new_test_ctx() failure",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "cveId": "CVE-2026-31459",
    "datePublished": "2026-04-22T13:53:51.554Z",
    "dateReserved": "2026-03-09T15:48:24.092Z",
    "dateUpdated": "2026-04-22T13:53:51.554Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-6C8G-Q98P-W229

CVE-2026-31459 (GCVE-0-2026-31459)

Tags

Sightings

Nomenclature