Vulnerability-Lookup

GHSA-XJXP-4739-CHG8

Vulnerability from github – Published: 2026-08-22 18:30 – Updated: 2026-08-22 18:30

Details

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

drm/amd/display: Check for tg ops in dce110_set_avmute

Some older DCE timing generators do not implement is_tg_enabled in their ops table. Calling it unconditionally when waiting for AV mute frames causes a NULL pointer dereference on Southern Islands dGPUs when turning the display off over HDMI.

Check that tg and the required ops exist before waiting for frames.

(cherry picked from commit 2686a0c0aaa07bec2e24131835cf27b5fd4935a5)

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-74732"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T16:16:48Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Check for tg ops in dce110_set_avmute\n\nSome older DCE timing generators do not implement is_tg_enabled in\ntheir ops table. Calling it unconditionally when waiting for AV mute\nframes causes a NULL pointer dereference on Southern Islands dGPUs\nwhen turning the display off over HDMI.\n\nCheck that tg and the required ops exist before waiting for frames.\n\n(cherry picked from commit 2686a0c0aaa07bec2e24131835cf27b5fd4935a5)",
  "id": "GHSA-xjxp-4739-chg8",
  "modified": "2026-08-22T18:30:30Z",
  "published": "2026-08-22T18:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74732"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3141e3d61469bba2624a91c5e2407f110b33b29e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5edbb409b0bc5001195f4b7cfca19122361211a1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/853c2d31408bd45dcf92d0eb1f06eb439a56cf04"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d089f32d34f821c8f0ef23d5fcd77bd43c1b3b92"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-74732 (GCVE-0-2026-74732)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:33 – Updated: 2026-08-22 15:33

Title

drm/amd/display: Check for tg ops in dce110_set_avmute

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Check for tg ops in dce110_set_avmute Some older DCE timing generators do not implement is_tg_enabled in their ops table. Calling it unconditionally when waiting for AV mute frames causes a NULL pointer dereference on Southern Islands dGPUs when turning the display off over HDMI. Check that tg and the required ops exist before waiting for frames. (cherry picked from commit 2686a0c0aaa07bec2e24131835cf27b5fd4935a5)

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/853c2d31408bd45dc…
https://git.kernel.org/stable/c/d089f32d34f821c8f…
https://git.kernel.org/stable/c/5edbb409b0bc50011…
https://git.kernel.org/stable/c/3141e3d61469bba26…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 853c2d31408bd45dcf92d0eb1f06eb439a56cf04 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d089f32d34f821c8f0ef23d5fcd77bd43c1b3b92 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5edbb409b0bc5001195f4b7cfca19122361211a1 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3141e3d61469bba2624a91c5e2407f110b33b29e (git) Affected: 0 , < 6.12.104 (semver) Affected: 0 , < 6.18.45 (semver) Affected: 0 , < 7.1.9 (semver)
Linux	Linux	Unaffected: 6.12.104 , ≤ 6.12.* (semver) Unaffected: 6.18.45 , ≤ 6.18.* (semver) Unaffected: 7.1.9 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "853c2d31408bd45dcf92d0eb1f06eb439a56cf04",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "d089f32d34f821c8f0ef23d5fcd77bd43c1b3b92",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "5edbb409b0bc5001195f4b7cfca19122361211a1",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "3141e3d61469bba2624a91c5e2407f110b33b29e",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "6.12.104",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.18.45",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "7.1.9",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.104",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.45",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Check for tg ops in dce110_set_avmute\n\nSome older DCE timing generators do not implement is_tg_enabled in\ntheir ops table. Calling it unconditionally when waiting for AV mute\nframes causes a NULL pointer dereference on Southern Islands dGPUs\nwhen turning the display off over HDMI.\n\nCheck that tg and the required ops exist before waiting for frames.\n\n(cherry picked from commit 2686a0c0aaa07bec2e24131835cf27b5fd4935a5)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-22T15:33:20.934Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/853c2d31408bd45dcf92d0eb1f06eb439a56cf04"
        },
        {
          "url": "https://git.kernel.org/stable/c/d089f32d34f821c8f0ef23d5fcd77bd43c1b3b92"
        },
        {
          "url": "https://git.kernel.org/stable/c/5edbb409b0bc5001195f4b7cfca19122361211a1"
        },
        {
          "url": "https://git.kernel.org/stable/c/3141e3d61469bba2624a91c5e2407f110b33b29e"
        }
      ],
      "title": "drm/amd/display: Check for tg ops in dce110_set_avmute",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74732",
    "datePublished": "2026-08-22T15:33:20.934Z",
    "dateReserved": "2026-08-15T05:44:03.930Z",
    "dateUpdated": "2026-08-22T15:33:20.934Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.