{"id":"CVE-2026-43305","state":"PUBLISHED","title":"drm/amd/display: Fix mismatched unlock for DMUB HW lock in HWSS fast path","description":"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't 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.","publishedAt":"2026-05-08T13:11:24.952Z","updatedAt":"2026-05-11T22:21:59.194Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7d041982fe11fff29b32a09228c4d52f159b56ad","status":"affected","lessThan":"4e387ad67efb100b645630ffbce7716786f52283","versionType":"git"},{"version":"7d041982fe11fff29b32a09228c4d52f159b56ad","status":"affected","lessThan":"af3303970da5ce5bfe6dffdd07f38f42aad603e0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c"]}],"references":["https://git.kernel.org/stable/c/4e387ad67efb100b645630ffbce7716786f52283","https://git.kernel.org/stable/c/af3303970da5ce5bfe6dffdd07f38f42aad603e0"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43305.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43305","state":"PUBLISHED","datePublished":"2026-05-08T13:11:24.952Z","dateUpdated":"2026-05-11T22:21:59.194Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:56.000Z"},"containers":{"cna":{"title":"drm/amd/display: Fix mismatched unlock for DMUB HW lock in HWSS fast path","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't 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7d041982fe11fff29b32a09228c4d52f159b56ad","status":"affected","lessThan":"4e387ad67efb100b645630ffbce7716786f52283","versionType":"git"},{"version":"7d041982fe11fff29b32a09228c4d52f159b56ad","status":"affected","lessThan":"af3303970da5ce5bfe6dffdd07f38f42aad603e0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/4e387ad67efb100b645630ffbce7716786f52283"},{"url":"https://git.kernel.org/stable/c/af3303970da5ce5bfe6dffdd07f38f42aad603e0"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:21:59.194Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}