Vulnerability-Lookup

GHSA-66R8-MWCH-7X3R

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33

Details

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

drm/nouveau: fix u32 overflow in pushbuf reloc bounds check

nouveau_gem_pushbuf_reloc_apply() validates each relocation with

if (r->reloc_bo_offset + 4 > nvbo->bo.base.size)

but reloc_bo_offset is __u32 (uapi/drm/nouveau_drm.h) and the integer literal 4 promotes to unsigned int, so the addition is performed in 32 bits and wraps before the comparison against the size_t bo size.

Cast to u64 so the addition happens in 64-bit arithmetic.

[ Add Fixes: tag. - Danilo ]

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46006"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:18Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau: fix u32 overflow in pushbuf reloc bounds check\n\nnouveau_gem_pushbuf_reloc_apply() validates each relocation with\n\n    if (r-\u003ereloc_bo_offset + 4 \u003e nvbo-\u003ebo.base.size)\n\nbut reloc_bo_offset is __u32 (uapi/drm/nouveau_drm.h) and the integer\nliteral 4 promotes to unsigned int, so the addition is performed in 32\nbits and wraps before the comparison against the size_t bo size.\n\nCast to u64 so the addition happens in 64-bit arithmetic.\n\n[ Add Fixes: tag. - Danilo ]",
  "id": "GHSA-66r8-mwch-7x3r",
  "modified": "2026-05-27T15:33:20Z",
  "published": "2026-05-27T15:33:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46006"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2fc87d37be1b730a149b035f9375fdb8cc5333a5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/332884f5eb79dd60a7162b079d09d39208567a31"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d749a9a0ee4014681487e7ae549901aa8c176637"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e441d5c23ec644c8d27593db3b8928e8933512a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fa297e919d1680c38ab268ff952b1698dac987f6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-46006 (GCVE-0-2026-46006)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:56 – Updated: 2026-05-27 12:56

Title

drm/nouveau: fix u32 overflow in pushbuf reloc bounds check

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: fix u32 overflow in pushbuf reloc bounds check nouveau_gem_pushbuf_reloc_apply() validates each relocation with if (r->reloc_bo_offset + 4 > nvbo->bo.base.size) but reloc_bo_offset is __u32 (uapi/drm/nouveau_drm.h) and the integer literal 4 promotes to unsigned int, so the addition is performed in 32 bits and wraps before the comparison against the size_t bo size. Cast to u64 so the addition happens in 64-bit arithmetic. [ Add Fixes: tag. - Danilo ]

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/fa297e919d1680c38…
https://git.kernel.org/stable/c/d749a9a0ee4014681…
https://git.kernel.org/stable/c/332884f5eb79dd60a…
https://git.kernel.org/stable/c/e441d5c23ec644c8d…
https://git.kernel.org/stable/c/2fc87d37be1b730a1…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: a1606a9596e54da90ad6209071b357a4c1b0fa82 , < fa297e919d1680c38ab268ff952b1698dac987f6 (git) Affected: a1606a9596e54da90ad6209071b357a4c1b0fa82 , < d749a9a0ee4014681487e7ae549901aa8c176637 (git) Affected: a1606a9596e54da90ad6209071b357a4c1b0fa82 , < 332884f5eb79dd60a7162b079d09d39208567a31 (git) Affected: a1606a9596e54da90ad6209071b357a4c1b0fa82 , < e441d5c23ec644c8d27593db3b8928e8933512a9 (git) Affected: a1606a9596e54da90ad6209071b357a4c1b0fa82 , < 2fc87d37be1b730a149b035f9375fdb8cc5333a5 (git)
Linux	Linux	Affected: 2.6.34 Unaffected: 0 , < 2.6.34 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.86 , ≤ 6.12.* (semver) Unaffected: 6.18.27 , ≤ 6.18.* (semver) Unaffected: 7.0.4 , ≤ 7.0.* (semver) Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/nouveau/nouveau_gem.c"
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          "vendor": "Linux",
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            {
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              "status": "affected",
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              "versionType": "git"
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        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
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          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
              "version": "0",
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.27",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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        {
          "url": "https://git.kernel.org/stable/c/2fc87d37be1b730a149b035f9375fdb8cc5333a5"
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    "datePublished": "2026-05-27T12:56:05.273Z",
    "dateReserved": "2026-05-13T15:03:33.092Z",
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    "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-66R8-MWCH-7X3R

CVE-2026-46006 (GCVE-0-2026-46006)

Tags

Sightings

Nomenclature