GHSA-XP2W-QR8J-R6P4

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-06-24 18:32
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

mm/damon/core: validate damos_quota_goal->nid for node_memcg_{used,free}_bp

Users can set damos_quota_goal->nid with arbitrary value for node_memcg_{used,free}_bp. But DAMON core is using those for NODE-DATA() without a validation of the value. This can result in out of bounds memory access. The issue can actually triggered using DAMON user-space tool (damo), like below.

$ sudo mkdir /sys/fs/cgroup/foo
$ sudo ./damo start --damos_action stat --damos_quota_interval 1s \
        --damos_quota_goal node_memcg_used_bp 50% -1 /foo
$ sudo dmseg
[...]
[  524.181426] Unable to handle kernel paging request at virtual address 0000000000002c00

Fix this issue by adding the validation of the given node id. If an invalid node id is given, it returns 0% for used memory ratio, and 100% for free memory ratio.

Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2026-46067"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:27Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/core: validate damos_quota_goal-\u003enid for node_memcg_{used,free}_bp\n\nUsers can set damos_quota_goal-\u003enid with arbitrary value for\nnode_memcg_{used,free}_bp.  But DAMON core is using those for NODE-DATA()\nwithout a validation of the value.  This can result in out of bounds\nmemory access.  The issue can actually triggered using DAMON user-space\ntool (damo), like below.\n\n    $ sudo mkdir /sys/fs/cgroup/foo\n    $ sudo ./damo start --damos_action stat --damos_quota_interval 1s \\\n            --damos_quota_goal node_memcg_used_bp 50% -1 /foo\n    $ sudo dmseg\n    [...]\n    [  524.181426] Unable to handle kernel paging request at virtual address 0000000000002c00\n\nFix this issue by adding the validation of the given node id.  If an\ninvalid node id is given, it returns 0% for used memory ratio, and 100%\nfor free memory ratio.",
  "id": "GHSA-xp2w-qr8j-r6p4",
  "modified": "2026-06-24T18:32:29Z",
  "published": "2026-05-27T15:33:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46067"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a34dac6482e53e2c76944f25b1489b9b7da3a6e6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/da10db73ada26345244ea5dc52f974692bd05f66"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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