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drm/vmwgfx: validate DRAW_PRIMITIVES header size before division

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: validate DRAW_PRIMITIVES header size before division vmw_cmd_draw() computes maxnum = (header->size - sizeof(cmd->body)) / sizeof(*decl); where header->size is u32 and is taken straight from the user-supplied command stream. When header->size is less than sizeof(cmd->body) the unsigned subtraction wraps to nearly 4 GiB, producing a huge maxnum. Any user-controlled cmd->body.numVertexDecls then passes the bound and the loop dereferences decl[i] far past the end of the kernel command bounce buffer, producing an out-of-bounds read of kernel memory. Reject undersized headers up front.

Announced Source revision 1
Original source ↗

CVE-2026-74444

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-74444

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
        "lessThan": "b89ca4bba820f79dde52af15ee139fe6e8bbc314",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
        "lessThan": "bef30317fcb4c838a37bceb2fc76256eb6b975c1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
        "lessThan": "112c6ff29a56f3a22db4d5af869697aa07035ad6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
        "lessThan": "2666cddf0dd218aa9bd1f99db688d1b532eac21a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
        "lessThan": "fc0c02f510e41650df3479f96e257acf87d8a20a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
        "lessThan": "dc0be7662b7b0ce28cb5eea864737793ed7b9e70",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
        "lessThan": "c77cf8edae2bd3a1599115301cc7c98d0c78e731",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
        "lessThan": "85891d174707d8bddcec7a888fb4e1d17def34f3",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.33"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.33",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.265",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.216",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.183",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.151",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.103",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.44",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.8",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-74444

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#33154 · Revision 1
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Publisher date
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