Vulnerability-Lookup

GHSA-Q4G6-XQ34-4JXW

Vulnerability from github – Published: 2026-05-08 15:31 – Updated: 2026-05-08 15:31

Details

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

drm/amdgpu: add upper bound check on user inputs in signal ioctl

Huge input values in amdgpu_userq_signal_ioctl can lead to a OOM and could be exploited.

So check these input value against AMDGPU_USERQ_MAX_HANDLES which is big enough value for genuine use cases and could potentially avoid OOM.

(cherry picked from commit be267e15f99bc97cbe202cd556717797cdcf79a5)

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43400"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-08T15:16:51Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: add upper bound check on user inputs in signal ioctl\n\nHuge input values in amdgpu_userq_signal_ioctl can lead to a OOM and\ncould be exploited.\n\nSo check these input value against AMDGPU_USERQ_MAX_HANDLES\nwhich is big enough value for genuine use cases and could\npotentially avoid OOM.\n\n(cherry picked from commit be267e15f99bc97cbe202cd556717797cdcf79a5)",
  "id": "GHSA-q4g6-xq34-4jxw",
  "modified": "2026-05-08T15:31:27Z",
  "published": "2026-05-08T15:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43400"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/46630d966b99b0fc6cb01fef4110587f3375a0c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6fff5204d8aa26b1be50b6427f833bd3e8899c4f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ea78f8c68f4f6211c557df49174c54d167821962"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-43400 (GCVE-0-2026-43400)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:21 – Updated: 2026-05-11 22:23

Title

drm/amdgpu: add upper bound check on user inputs in signal ioctl

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: add upper bound check on user inputs in signal ioctl Huge input values in amdgpu_userq_signal_ioctl can lead to a OOM and could be exploited. So check these input value against AMDGPU_USERQ_MAX_HANDLES which is big enough value for genuine use cases and could potentially avoid OOM. (cherry picked from commit be267e15f99bc97cbe202cd556717797cdcf79a5)

Severity ?

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/6fff5204d8aa26b1b…
https://git.kernel.org/stable/c/46630d966b99b0fc6…
https://git.kernel.org/stable/c/ea78f8c68f4f6211c…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: a292fdecd72834b3bec380baa5db1e69e7f70679 , < 6fff5204d8aa26b1be50b6427f833bd3e8899c4f (git) Affected: a292fdecd72834b3bec380baa5db1e69e7f70679 , < 46630d966b99b0fc6cb01fef4110587f3375a0c0 (git) Affected: a292fdecd72834b3bec380baa5db1e69e7f70679 , < ea78f8c68f4f6211c557df49174c54d167821962 (git)
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (semver) Unaffected: 6.18.19 , ≤ 6.18.* (semver) Unaffected: 6.19.9 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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            },
            {
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              "status": "affected",
              "version": "a292fdecd72834b3bec380baa5db1e69e7f70679",
              "versionType": "git"
            },
            {
              "lessThan": "ea78f8c68f4f6211c557df49174c54d167821962",
              "status": "affected",
              "version": "a292fdecd72834b3bec380baa5db1e69e7f70679",
              "versionType": "git"
            }
          ]
        },
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
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            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.19",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
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                },
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                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: add upper bound check on user inputs in signal ioctl\n\nHuge input values in amdgpu_userq_signal_ioctl can lead to a OOM and\ncould be exploited.\n\nSo check these input value against AMDGPU_USERQ_MAX_HANDLES\nwhich is big enough value for genuine use cases and could\npotentially avoid OOM.\n\n(cherry picked from commit be267e15f99bc97cbe202cd556717797cdcf79a5)"
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      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:23:51.059Z",
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        },
        {
          "url": "https://git.kernel.org/stable/c/ea78f8c68f4f6211c557df49174c54d167821962"
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    "cveId": "CVE-2026-43400",
    "datePublished": "2026-05-08T14:21:42.225Z",
    "dateReserved": "2026-05-01T14:12:56.007Z",
    "dateUpdated": "2026-05-11T22:23:51.059Z",
    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date	Other

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-Q4G6-XQ34-4JXW

CVE-2026-43400 (GCVE-0-2026-43400)

Tags

Sightings

Nomenclature