FKIE_CVE-2026-53135

Vulnerability from fkie_nvd - Published: 2026-06-25 09:16 - Updated: 2026-06-30 14:44
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix NULL deref and buffer over-read in SDP debugfs [Why & How] dp_sdp_message_debugfs_write() dereferences connector->base.state->crtc without checking for NULL. A connector can be connected but not bound to any CRTC (e.g. after hot-plug before the next atomic commit), causing a kernel crash when writing to the sdp_message debugfs node. The function also ignores the user-provided size argument and always passes 36 bytes to copy_from_user(), reading past the user buffer when size < 36. Fix both issues by: - Returning -ENODEV when connector->base.state or state->crtc is NULL - Clamping write_size to min(size, sizeof(data)) (cherry picked from commit 6ab4c36a522842ff70474a1c0af2e40e50fc8300)
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7ae95c0275c330b5dbae806f8e431720edad776f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7fc4fab4acc307ad2903312c195872b2953d32c3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a2de1d71891a038a9346b2c1a72b88c8350f2479
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/adf67034b1f61f7119295208085bfd43f85f56af
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b781f90a9528555c709e59789550893581ef0be4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bb6f705b73b5f191f14ad004e2c8c4b615806187
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c90954cdea4d6998ec345de0d840d030c145b89e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ee9cfcf77a8e8af637396dc00966df5f701e661c
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ee9cfcf77a8e8af637396dc00966df5f701e661c",
              "status": "affected",
              "version": "c7ba3653e9773256b2b08508a2ed2ca28ea7566b",
              "versionType": "git"
            },
            {
              "lessThan": "b781f90a9528555c709e59789550893581ef0be4",
              "status": "affected",
              "version": "c7ba3653e9773256b2b08508a2ed2ca28ea7566b",
              "versionType": "git"
            },
            {
              "lessThan": "a2de1d71891a038a9346b2c1a72b88c8350f2479",
              "status": "affected",
              "version": "c7ba3653e9773256b2b08508a2ed2ca28ea7566b",
              "versionType": "git"
            },
            {
              "lessThan": "7fc4fab4acc307ad2903312c195872b2953d32c3",
              "status": "affected",
              "version": "c7ba3653e9773256b2b08508a2ed2ca28ea7566b",
              "versionType": "git"
            },
            {
              "lessThan": "7ae95c0275c330b5dbae806f8e431720edad776f",
              "status": "affected",
              "version": "c7ba3653e9773256b2b08508a2ed2ca28ea7566b",
              "versionType": "git"
            },
            {
              "lessThan": "bb6f705b73b5f191f14ad004e2c8c4b615806187",
              "status": "affected",
              "version": "c7ba3653e9773256b2b08508a2ed2ca28ea7566b",
              "versionType": "git"
            },
            {
              "lessThan": "c90954cdea4d6998ec345de0d840d030c145b89e",
              "status": "affected",
              "version": "c7ba3653e9773256b2b08508a2ed2ca28ea7566b",
              "versionType": "git"
            },
            {
              "lessThan": "adf67034b1f61f7119295208085bfd43f85f56af",
              "status": "affected",
              "version": "c7ba3653e9773256b2b08508a2ed2ca28ea7566b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.2"
            },
            {
              "lessThan": "5.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.259",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.94",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix NULL deref and buffer over-read in SDP debugfs\n\n[Why \u0026 How]\ndp_sdp_message_debugfs_write() dereferences connector-\u003ebase.state-\u003ecrtc\nwithout checking for NULL. A connector can be connected but not bound to\nany CRTC (e.g. after hot-plug before the next atomic commit), causing a\nkernel crash when writing to the sdp_message debugfs node.\n\nThe function also ignores the user-provided size argument and always\npasses 36 bytes to copy_from_user(), reading past the user buffer when\nsize \u003c 36.\n\nFix both issues by:\n- Returning -ENODEV when connector-\u003ebase.state or state-\u003ecrtc is NULL\n- Clamping write_size to min(size, sizeof(data))\n\n(cherry picked from commit 6ab4c36a522842ff70474a1c0af2e40e50fc8300)"
    }
  ],
  "id": "CVE-2026-53135",
  "lastModified": "2026-06-30T14:44:27.313",
  "metrics": {},
  "published": "2026-06-25T09:16:30.787",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7ae95c0275c330b5dbae806f8e431720edad776f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7fc4fab4acc307ad2903312c195872b2953d32c3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a2de1d71891a038a9346b2c1a72b88c8350f2479"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/adf67034b1f61f7119295208085bfd43f85f56af"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b781f90a9528555c709e59789550893581ef0be4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bb6f705b73b5f191f14ad004e2c8c4b615806187"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c90954cdea4d6998ec345de0d840d030c145b89e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ee9cfcf77a8e8af637396dc00966df5f701e661c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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