{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43191", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.992Z", "datePublished": "2026-05-06T11:28:00.470Z", "dateUpdated": "2026-05-06T11:28:00.470Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-06T11:28:00.470Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Adjust PHY FSM transition to TX_EN-to-PLL_ON for TMDS on DCN35\n\n[Why]\nA backport of the change made for DCN401 that addresses an issue where\nwe turn off the PHY PLL when disabling TMDS output, which causes the\nOTG to remain stuck.\n\nThe OTG being stuck can lead to a hang in the DCHVM's ability to ACK\ninvalidations when it thinks the HUBP is still on but it's not receiving\nglobal sync.\n\nThe transition to PLL_ON needs to be atomic as there's no guarantee\nthat the thread isn't pre-empted or is able to complete before the\nIOMMU watchdog times out.\n\n[How]\nBackport the implementation from dcn401 back to dcn35.\n\nThere's a functional difference in when the eDP output is disabled in\ndcn401 code so we don't want to utilize it directly."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c", "drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.h", "drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_init.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d1f7ceb00e8956ff6d183b7b45ef4e73c96f4c51", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "75372d75a4e23783583998ed99d5009d555850da", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c", "drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.h", "drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_init.c"], "versions": [{"version": "6.19.6", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.19.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d1f7ceb00e8956ff6d183b7b45ef4e73c96f4c51"}, {"url": "https://git.kernel.org/stable/c/75372d75a4e23783583998ed99d5009d555850da"}], "title": "drm/amd/display: Adjust PHY FSM transition to TX_EN-to-PLL_ON for TMDS on DCN35", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Adjust PHY FSM transition to TX_EN-to-PLL_ON for TMDS on DCN35\n\n[Why]\nA backport of the change made for DCN401 that addresses an issue where\nwe turn off the PHY PLL when disabling TMDS output, which causes the\nOTG to remain stuck.\n\nThe OTG being stuck can lead to a hang in the DCHVM's ability to ACK\ninvalidations when it thinks the HUBP is still on but it's not receiving\nglobal sync.\n\nThe transition to PLL_ON needs to be atomic as there's no guarantee\nthat the thread isn't pre-empted or is able to complete before the\nIOMMU watchdog times out.\n\n[How]\nBackport the implementation from dcn401 back to dcn35.\n\nThere's a functional difference in when the eDP output is disabled in\ndcn401 code so we don't want to utilize it directly."}], "id": "CVE-2026-43191", "lastModified": "2026-05-06T13:07:51.607", "metrics": {}, "published": "2026-05-06T12:16:37.970", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/75372d75a4e23783583998ed99d5009d555850da"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d1f7ceb00e8956ff6d183b7b45ef4e73c96f4c51"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: drm/amd/display: Adjust PHY FSM transition to TX_EN-to-PLL_ON for TMDS on DCN35", "id": "2467111", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467111"}, "csaw": false, "cwe": "CWE-821", "details": ["A flaw was found in the Linux kernel's AMD display (drm/amd/display) component. An issue occurs when the physical layer's finite state machine (PHY FSM) incorrectly transitions during the disabling of Transition Minimized Differential Signaling (TMDS) output on DCN35 hardware. This can cause the Output Timing Generator (OTG) to become stuck, leading to a system hang and a denial of service."], "name": "CVE-2026-43191", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43191\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43191\nhttps://lore.kernel.org/linux-cve-announce/2026050642-CVE-2026-43191-8efb@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,d1f7ceb00e8956ff6d183b7b45ef4e73c96f4c51)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,75372d75a4e23783583998ed99d5009d555850da)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.6,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-06T14:15:05.983114+00:00", "updated": "2026-05-07T06:15:23.475614+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}