{
  "cveId": "CVE-2026-46020",
  "url": "https://patchblox.com/security/cve/CVE-2026-46020",
  "summary": "CVE-2026-46020 is fixed in 19 products on 1 platform, first by ALAS2023-2026-1754, released May 25, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  mm/damon/core: validate damos_quota_goal-\u003Enid fo...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  mm/damon/core: validate damos_quota_goal-\u003Enid for node_mem_{used,free}_bp  Patch series \u0022mm/damon/core: validate damos_quota_goal-\u003Enid\u0022.  node_mem[cg]_{used,free}_bp DAMOS quota goals receive the node id.  The node id is used for si_meminfo_node() and NODE_DATA() without proper validation.  As a result, privileged users can trigger an out of bounds memory access using DAMON_SYSFS.  Fix the issues.  The issue was originally reported [1] with a fix by another author.  The original author announced [2] that they will stop working including the fix that was still in the review stage.  Hence I\u0027m restarting this.   This patch (of 2):  Users can set damos_quota_goal-\u003Enid with arbitrary value for node_mem_{used,free}_bp.  But DAMON core is using those for si_meminfo_node() without the 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 ./damo start --damos_action stat \\     \t--damos_quota_goal node_mem_used_bp 50% -1 \\     \t--damos_quota_interval 1s     $ sudo dmesg     [...]     [   65.565986] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000098  Fix this issue by adding the validation of the given node.  If an invalid node id is given, it returns 0% for used memory ratio, and 100% for free memory ratio.",
  "published": "2026-05-25T09:00:00Z",
  "severity": "high",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
  "epss": 0.00124,
  "epssPercentile": 0.02134,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.18.30-61.116",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.0.4-1",
      "fix": "DEBIAN-CVE-2026-46020",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-46020",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
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      "product": "perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
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      "product": "python3-perf6.18",
      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
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      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}