{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43477", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:56.011Z", "datePublished": "2026-05-13T15:08:26.763Z", "dateUpdated": "2026-05-13T15:08:26.763Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-13T15:08:26.763Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/vrr: Configure VRR timings after enabling TRANS_DDI_FUNC_CTL\n\nApparently ICL may hang with an MCE if we write TRANS_VRR_VMAX/FLIPLINE\nbefore enabling TRANS_DDI_FUNC_CTL.\n\nPersonally I was only able to reproduce a hang (on an Dell XPS 7390\n2-in-1) with an external display connected via a dock using a dodgy\ntype-C cable that made the link training fail. After the failed\nlink training the machine would hang. TGL seemed immune to the\nproblem for whatever reason.\n\nBSpec does tell us to configure VRR after enabling TRANS_DDI_FUNC_CTL\nas well. The DMC firmware also does the VRR restore in two stages:\n- first stage seems to be unconditional and includes TRANS_VRR_CTL\n and a few other VRR registers, among other things\n- second stage is conditional on the DDI being enabled,\n and includes TRANS_DDI_FUNC_CTL and TRANS_VRR_VMAX/VMIN/FLIPLINE,\n among other things\n\nSo let's reorder the steps to match to avoid the hang, and\ntoss in an extra WARN to make sure we don't screw this up later.\n\nBSpec: 22243\n(cherry picked from commit 93f3a267c3dd4d811b224bb9e179a10d81456a74)"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/i915/display/intel_display.c", "drivers/gpu/drm/i915/display/intel_vrr.c"], "versions": [{"version": "dda7dcd9da73c5327aef42b89f0519bb51e84217", "lessThan": "8a7d29b8bda144d44e61df1b2705b1d4378f4e44", "status": "affected", "versionType": "git"}, {"version": "dda7dcd9da73c5327aef42b89f0519bb51e84217", "lessThan": "bf9e3b6ffd76da38dd4961c65d80571b25bf10a5", "status": "affected", "versionType": "git"}, {"version": "dda7dcd9da73c5327aef42b89f0519bb51e84217", "lessThan": "237aab549676288d9255bb8dcc284738e56eaa31", "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/i915/display/intel_display.c", "drivers/gpu/drm/i915/display/intel_vrr.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.20", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.9", "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:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "6.18.20"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "6.19.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8a7d29b8bda144d44e61df1b2705b1d4378f4e44"}, {"url": "https://git.kernel.org/stable/c/bf9e3b6ffd76da38dd4961c65d80571b25bf10a5"}, {"url": "https://git.kernel.org/stable/c/237aab549676288d9255bb8dcc284738e56eaa31"}], "title": "drm/i915/vrr: Configure VRR timings after enabling TRANS_DDI_FUNC_CTL", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/vrr: Configure VRR timings after enabling TRANS_DDI_FUNC_CTL\n\nApparently ICL may hang with an MCE if we write TRANS_VRR_VMAX/FLIPLINE\nbefore enabling TRANS_DDI_FUNC_CTL.\n\nPersonally I was only able to reproduce a hang (on an Dell XPS 7390\n2-in-1) with an external display connected via a dock using a dodgy\ntype-C cable that made the link training fail. After the failed\nlink training the machine would hang. TGL seemed immune to the\nproblem for whatever reason.\n\nBSpec does tell us to configure VRR after enabling TRANS_DDI_FUNC_CTL\nas well. The DMC firmware also does the VRR restore in two stages:\n- first stage seems to be unconditional and includes TRANS_VRR_CTL\n and a few other VRR registers, among other things\n- second stage is conditional on the DDI being enabled,\n and includes TRANS_DDI_FUNC_CTL and TRANS_VRR_VMAX/VMIN/FLIPLINE,\n among other things\n\nSo let's reorder the steps to match to avoid the hang, and\ntoss in an extra WARN to make sure we don't screw this up later.\n\nBSpec: 22243\n(cherry picked from commit 93f3a267c3dd4d811b224bb9e179a10d81456a74)"}], "id": "CVE-2026-43477", "lastModified": "2026-05-13T16:16:50.807", "metrics": {}, "published": "2026-05-13T16:16:50.807", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/237aab549676288d9255bb8dcc284738e56eaa31"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8a7d29b8bda144d44e61df1b2705b1d4378f4e44"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bf9e3b6ffd76da38dd4961c65d80571b25bf10a5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: drm/i915/vrr: Configure VRR timings after enabling TRANS_DDI_FUNC_CTL", "id": "2477093", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477093"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-841", "details": ["A flaw was found in the Linux kernel. Incorrectly configuring Variable Refresh Rate (VRR) timings before enabling display functionality can cause the system to hang. This issue, which may occur with certain display setups, can lead to a complete system freeze, resulting in a denial of service."], "name": "CVE-2026-43477", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43477\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43477\nhttps://lore.kernel.org/linux-cve-announce/2026051347-CVE-2026-43477-189e@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[dda7dcd9da73c5327aef42b89f0519bb51e84217,8a7d29b8bda144d44e61df1b2705b1d4378f4e44)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[dda7dcd9da73c5327aef42b89f0519bb51e84217,bf9e3b6ffd76da38dd4961c65d80571b25bf10a5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[dda7dcd9da73c5327aef42b89f0519bb51e84217,237aab549676288d9255bb8dcc284738e56eaa31)"}}], "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": "affected", "versions": {"scheme": "semver", "value": "6.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.20,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.9,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "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": "2026-05-13T17:45:25.465094+00:00", "updated": "2026-05-14T15:30:16.438753+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}