CVE-2026-43305 (GCVE-0-2026-43305)
Vulnerability from cvelistv5
Published
2026-05-08 13:11
Modified
2026-05-11 22:21
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix mismatched unlock for DMUB HW lock in HWSS fast path [Why] The evaluation for whether we need to use the DMUB HW lock isn't the same as whether we need to unlock which results in a hang when the fast path is used for ASIC without FAMS support. [How] Store a flag that indicates whether we should use the lock and use that same flag to specify whether unlocking is needed.
References
Impacted products
Vendor Product Version
Linux Linux Version: 7d041982fe11fff29b32a09228c4d52f159b56ad
Version: 7d041982fe11fff29b32a09228c4d52f159b56ad
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "vendor": "Linux",
          "versions": [
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              "version": "6.19"
            },
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              "status": "unaffected",
              "version": "0",
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            {
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              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.6",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "7.0",
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                  "vulnerable": true
                }
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix mismatched unlock for DMUB HW lock in HWSS fast path\n\n[Why]\nThe evaluation for whether we need to use the DMUB HW lock isn\u0027t the\nsame as whether we need to unlock which results in a hang when the\nfast path is used for ASIC without FAMS support.\n\n[How]\nStore a flag that indicates whether we should use the lock and use\nthat same flag to specify whether unlocking is needed."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:21:59.194Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4e387ad67efb100b645630ffbce7716786f52283"
        },
        {
          "url": "https://git.kernel.org/stable/c/af3303970da5ce5bfe6dffdd07f38f42aad603e0"
        }
      ],
      "title": "drm/amd/display: Fix mismatched unlock for DMUB HW lock in HWSS fast path",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43305",
    "datePublished": "2026-05-08T13:11:24.952Z",
    "dateReserved": "2026-05-01T14:12:56.000Z",
    "dateUpdated": "2026-05-11T22:21:59.194Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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