CVE-2026-31767

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Bspec seems to be telling\nus to do this only in video mode, and this is also how the\nWindows driver does things.\n\nThis should also fix a div-by-zero on some machines because\nthe adjusted htotal ends up being so small that we end up with\nline_time_us==0 when trying to determine the vtotal value in\ncommand mode.\n\nNote that this doesn't actually make the display on the\nHuawei Matebook E work, but at least the kernel no longer\nexplodes when the driver loads.\n\n(cherry picked from commit 0b475e91ecc2313207196c6d7fd5c53e1a878525)"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/i915/dsi: No realizar ajustes de temporizaci\u00f3n horizontal DSC en modo comando\n\nDejar de ajustar los valores de temporizaci\u00f3n horizontal bas\u00e1ndose en la relaci\u00f3n de compresi\u00f3n en modo comando. Bspec parece indicarnos que hagamos esto solo en modo video, y as\u00ed es tambi\u00e9n como el controlador de Windows hace las cosas.\n\nEsto tambi\u00e9n deber\u00eda solucionar una divisi\u00f3n por cero en algunas m\u00e1quinas porque el htotal ajustado termina siendo tan peque\u00f1o que terminamos con line_time_us==0 al intentar determinar el valor de vtotal en modo comando.\n\nTenga en cuenta que esto en realidad no hace que la pantalla del Huawei Matebook E funcione, pero al menos el kernel ya no explota cuando el controlador se carga.\n\n(seleccionado de la confirmaci\u00f3n 0b475e91ecc2313207196c6d7fd5c53e1a878525)"}], "id": "CVE-2026-31767", "lastModified": "2026-11-11T21:10:00.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-31767", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T15:25:07.306539Z", "version": "2.0.3"}}]}, "published": "2026-05-01T15:16:39.870", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/33b5336e4fd8ba0e40a12989cadb3f5534a0f9e4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/481f7a463ae4bea9503ae7fa1481ad75dc872af4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4dfce79e098915d8e5fc2b9e1d980bc3251dd32c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/55efe8402f46af8399c8b634a18b130a05fd7820"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/80cc84bdc49addaee6b6e4f735f574ab5a424c42"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/86e926b108880c0109b8635e459450447156aeb7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-369"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: drm/i915/dsi: Don't do DSC horizontal timing adjustments in command mode", "id": "2464488", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464488"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-369", "details": ["A flaw was found in the `drm/i915/dsi` module of the Linux kernel. Incorrect horizontal timing adjustments for Display Stream Compression (DSC) in command mode can lead to a division-by-zero error. This occurs when the adjusted horizontal total (`htotal`) becomes too small, causing the kernel to crash when determining the vertical total (`vtotal`). This vulnerability could result in a Denial of Service (DoS)."], "name": "CVE-2026-31767", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31767\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31767\nhttps://lore.kernel.org/linux-cve-announce/2026050147-CVE-2026-31767-cfcf@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[53693f02d80e0a909e76c2a25f8aac8515f959db,55efe8402f46af8399c8b634a18b130a05fd7820)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[53693f02d80e0a909e76c2a25f8aac8515f959db,86e926b108880c0109b8635e459450447156aeb7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[53693f02d80e0a909e76c2a25f8aac8515f959db,33b5336e4fd8ba0e40a12989cadb3f5534a0f9e4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[53693f02d80e0a909e76c2a25f8aac8515f959db,4dfce79e098915d8e5fc2b9e1d980bc3251dd32c)"}}], "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": "generic", "value": "5.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.81,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.22,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.12,6.20.0)"}}, {"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": "2026-05-01T19:00:08.011065+00:00", "updated": "2026-05-11T20:15:09.899141+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}