CVE-2022-49221

{"id": "CVE-2022-49221", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2025-02-26T07:00:59.167", "references": [{"url": "https://git.kernel.org/stable/c/104074ebc0c3f358dd1ee944fbcde92c6e5a21dd", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/413c62697b61226a236c8b1f5cd64dcf42bcc12f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5e602f5156910c7b19661699896cb6e3fb94fab9", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9525b8bcae8b99188990b56484799cf4b1b43786", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/fbba600f432a360b42452fee79d1fb35d3aa8aeb", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm/dp: populate connector of struct dp_panel\n\nDP CTS test case 4.2.2.6 has valid edid with bad checksum on purpose\nand expect DP source return correct checksum. During drm edid read,\ncorrect edid checksum is calculated and stored at\nconnector::real_edid_checksum.\n\nThe problem is struct dp_panel::connector never be assigned, instead the\nconnector is stored in struct msm_dp::connector. When we run compliance\ntesting test case 4.2.2.6 dp_panel_handle_sink_request() won't have a valid\nedid set in struct dp_panel::edid so we'll try to use the connectors\nreal_edid_checksum and hit a NULL pointer dereference error because the\nconnector pointer is never assigned.\n\nChanges in V2:\n-- populate panel connector at msm_dp_modeset_init() instead of at dp_panel_read_sink_caps()\n\nChanges in V3:\n-- remove unhelpful kernel crash trace commit text\n-- remove renaming dp_display parameter to dp\n\nChanges in V4:\n-- add more details to commit text\n\nChanges in v10:\n-- group into one series\n\nChanges in v11:\n-- drop drm/msm/dp: dp_link_parse_sink_count() return immediately if aux read\n\nSignee-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/msm/dp: rellenar el conector de struct dp_panel DP CTS caso de prueba 4.2.2.6 tiene un edid v\u00e1lido con suma de comprobaci\u00f3n incorrecta a prop\u00f3sito y espera que la fuente DP devuelva la suma de comprobaci\u00f3n correcta. Durante la lectura del edid de drm, se calcula la suma de comprobaci\u00f3n del edid correcta y se almacena en connector::real_edid_checksum. El problema es que struct dp_panel::connector nunca se asigna, en su lugar el conector se almacena en struct msm_dp::connector. Cuando ejecutamos el caso de prueba de prueba de cumplimiento 4.2.2.6 dp_panel_handle_sink_request() no tendr\u00e1 un edid v\u00e1lido establecido en struct dp_panel::edid, por lo que intentaremos usar el conector real_edid_checksum y nos encontraremos con un error de desreferencia de puntero NULL porque el puntero del conector nunca se asigna. Cambios en V2: -- rellenar el conector del panel en msm_dp_modeset_init() en lugar de en dp_panel_read_sink_caps() Cambios en V3: -- eliminar el texto de confirmaci\u00f3n de seguimiento de fallos del n\u00facleo que no es de ayuda -- eliminar el cambio de nombre del par\u00e1metro dp_display a dp Cambios en V4: -- a\u00f1adir m\u00e1s detalles al texto de confirmaci\u00f3n Cambios en v10: -- agrupar en una serie Cambios en v11: -- eliminar drm/msm/dp: dp_link_parse_sink_count() retorna inmediatamente si se lee aux. Firmado por: Kuogee Hsieh "}], "lastModified": "2025-03-18T19:33:38.933", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E35E629A-08A5-4AA5-AAD3-0327AB394504", "versionEndExcluding": "5.10.110", "versionStartIncluding": "5.10.67"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "097A0850-FAA6-4FFF-88C2-F5B49B5CE740", "versionEndExcluding": "5.14", "versionStartIncluding": "5.13.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "44ED6312-668B-40E9-985A-5399C9E479F5", "versionEndExcluding": "5.15.33", "versionStartIncluding": "5.14.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "20C43679-0439-405A-B97F-685BEE50613B", "versionEndExcluding": "5.16.19", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "210C679C-CF84-44A3-8939-E629C87E54BF", "versionEndExcluding": "5.17.2", "versionStartIncluding": "5.17"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}