Vulnerability-Lookup

FKIE_CVE-2026-23338

Vulnerability from fkie_nvd - Published: 2026-03-25 11:16 - Updated: 2026-03-25 15:41

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/userq: Do not allow userspace to trivially triger kernel warnings Userspace can either deliberately pass in the too small num_fences, or the required number can legitimately grow between the two calls to the userq wait ioctl. In both cases we do not want the emit the kernel warning backtrace since nothing is wrong with the kernel and userspace will simply get an errno reported back. So lets simply drop the WARN_ONs. (cherry picked from commit 2c333ea579de6cc20ea7bc50e9595ef72863e65c)

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1753f5f81ab60a553287f9ee659a6ac363adf8d7
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7321302edca3a349ddaea689df95b986beee6c4a
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7b7d7693a55d606d700beb9549c9f7f0e5d9c24f

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/userq: Do not allow userspace to trivially triger kernel warnings\n\nUserspace can either deliberately pass in the too small num_fences, or the\nrequired number can legitimately grow between the two calls to the userq\nwait ioctl. In both cases we do not want the emit the kernel warning\nbacktrace since nothing is wrong with the kernel and userspace will simply\nget an errno reported back. So lets simply drop the WARN_ONs.\n\n(cherry picked from commit 2c333ea579de6cc20ea7bc50e9595ef72863e65c)"
    }
  ],
  "id": "CVE-2026-23338",
  "lastModified": "2026-03-25T15:41:33.977",
  "metrics": {},
  "published": "2026-03-25T11:16:31.537",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1753f5f81ab60a553287f9ee659a6ac363adf8d7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7321302edca3a349ddaea689df95b986beee6c4a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7b7d7693a55d606d700beb9549c9f7f0e5d9c24f"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

CVE-2026-23338 (GCVE-0-2026-23338)

Vulnerability from cvelistv5 – Published: 2026-03-25 10:27 – Updated: 2026-03-25 10:27

Title

drm/amdgpu/userq: Do not allow userspace to trivially triger kernel warnings

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/1753f5f81ab60a553…
	https://git.kernel.org/stable/c/7321302edca3a349d…
	https://git.kernel.org/stable/c/7b7d7693a55d606d7…

Impacted products

Vendor

Product

Version

Linux

Affected: a292fdecd72834b3bec380baa5db1e69e7f70679 , < 1753f5f81ab60a553287f9ee659a6ac363adf8d7 (git)
Affected: a292fdecd72834b3bec380baa5db1e69e7f70679 , < 7321302edca3a349ddaea689df95b986beee6c4a (git)
Affected: a292fdecd72834b3bec380baa5db1e69e7f70679 , < 7b7d7693a55d606d700beb9549c9f7f0e5d9c24f (git)

Linux

Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.18.17 , ≤ 6.18.* (semver)
Unaffected: 6.19.7 , ≤ 6.19.* (semver)
Unaffected: 7.0-rc2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "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": [
            {
              "lessThan": "1753f5f81ab60a553287f9ee659a6ac363adf8d7",
              "status": "affected",
              "version": "a292fdecd72834b3bec380baa5db1e69e7f70679",
              "versionType": "git"
            },
            {
              "lessThan": "7321302edca3a349ddaea689df95b986beee6c4a",
              "status": "affected",
              "version": "a292fdecd72834b3bec380baa5db1e69e7f70679",
              "versionType": "git"
            },
            {
              "lessThan": "7b7d7693a55d606d700beb9549c9f7f0e5d9c24f",
              "status": "affected",
              "version": "a292fdecd72834b3bec380baa5db1e69e7f70679",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "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": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.17",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.7",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0-rc2",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/userq: Do not allow userspace to trivially triger kernel warnings\n\nUserspace can either deliberately pass in the too small num_fences, or the\nrequired number can legitimately grow between the two calls to the userq\nwait ioctl. In both cases we do not want the emit the kernel warning\nbacktrace since nothing is wrong with the kernel and userspace will simply\nget an errno reported back. So lets simply drop the WARN_ONs.\n\n(cherry picked from commit 2c333ea579de6cc20ea7bc50e9595ef72863e65c)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-25T10:27:27.377Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1753f5f81ab60a553287f9ee659a6ac363adf8d7"
        },
        {
          "url": "https://git.kernel.org/stable/c/7321302edca3a349ddaea689df95b986beee6c4a"
        },
        {
          "url": "https://git.kernel.org/stable/c/7b7d7693a55d606d700beb9549c9f7f0e5d9c24f"
        }
      ],
      "title": "drm/amdgpu/userq: Do not allow userspace to trivially triger kernel warnings",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23338",
    "datePublished": "2026-03-25T10:27:27.377Z",
    "dateReserved": "2026-01-13T15:37:45.997Z",
    "dateUpdated": "2026-03-25T10:27:27.377Z",
    "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

FKIE_CVE-2026-23338

CVE-2026-23338 (GCVE-0-2026-23338)

Tags

Sightings

Nomenclature