CVE-2022-49218

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/dp/drm_dp.c", "drivers/gpu/drm/tegra/dp.c", "include/drm/dp/drm_dp_helper.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "aeaed9a9fe694f8b1462fb81e2d33298c929180b", "status": "affected", "version": "79465e0ffeb9e4866939ea562bc55367be91e595", "versionType": "git"}, {"lessThan": "a2151490cc6c57b368d7974ffd447a8b36ade639", "status": "affected", "version": "79465e0ffeb9e4866939ea562bc55367be91e595", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/dp/drm_dp.c", "drivers/gpu/drm/tegra/dp.c", "include/drm/dp/drm_dp_helper.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.5"}, {"lessThan": "5.5", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.17.*", "status": "unaffected", "version": "5.17.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.18", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "88FA4E2D-4337-4268-BDC0-75FB6658B219", "versionEndExcluding": "5.17.2", "versionStartIncluding": "5.5", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/dp: Fix OOB read when handling Post Cursor2 register\n\nThe link_status array was not large enough to read the Adjust Request\nPost Cursor2 register, so remove the common helper function to avoid\nan OOB read, found with a -Warray-bounds build:\n\ndrivers/gpu/drm/drm_dp_helper.c: In function 'drm_dp_get_adjust_request_post_cursor':\ndrivers/gpu/drm/drm_dp_helper.c:59:27: error: array subscript 10 is outside array bounds of 'const u8[6]' {aka 'const unsigned char[6]'} [-Werror=array-bounds]\n 59 | return link_status[r - DP_LANE0_1_STATUS];\n | ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~\ndrivers/gpu/drm/drm_dp_helper.c:147:51: note: while referencing 'link_status'\n 147 | u8 drm_dp_get_adjust_request_post_cursor(const u8 link_status[DP_LINK_STATUS_SIZE],\n | ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\nReplace the only user of the helper with an open-coded fetch and decode,\nsimilar to drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/dp: Se corrige la lectura OOB al manejar el registro Post Cursor2 La matriz link_status no era lo suficientemente grande para leer el registro Post Cursor2 de solicitud de ajuste, por lo que se debe eliminar la funci\u00f3n auxiliar com\u00fan para evitar una lectura OOB, que se encontr\u00f3 con una compilaci\u00f3n -Warray-bounds: drivers/gpu/drm/drm_dp_helper.c: En la funci\u00f3n 'drm_dp_get_adjust_request_post_cursor': drivers/gpu/drm/drm_dp_helper.c:59:27: error: el sub\u00edndice 10 de la matriz est\u00e1 fuera de los l\u00edmites de la matriz 'const u8[6]' {tambi\u00e9n conocido como 'const unsigned char[6]'} [-Werror=array-bounds] 59 | ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/drm_dp_helper.c:147:51: nota: al hacer referencia a 'link_status' 147 | u8 drm_dp_get_adjust_request_post_cursor(const u8 link_status[DP_LINK_STATUS_SIZE], | ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Reemplace el \u00fanico usuario del ayudante con una b\u00fasqueda y decodificaci\u00f3n de c\u00f3digo abierto, similar a drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c."}], "id": "CVE-2022-49218", "lastModified": "2026-06-17T05:17:25.153", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49218", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T19:46:31.327734Z", "version": "2.0.3"}}]}, "published": "2025-02-26T07:00:58.890", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a2151490cc6c57b368d7974ffd447a8b36ade639"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/aeaed9a9fe694f8b1462fb81e2d33298c929180b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-125"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: drm/dp: Fix OOB read when handling Post Cursor2 register", "id": "2348078", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348078"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/dp: Fix OOB read when handling Post Cursor2 register\nThe link_status array was not large enough to read the Adjust Request\nPost Cursor2 register, so remove the common helper function to avoid\nan OOB read, found with a -Warray-bounds build:\ndrivers/gpu/drm/drm_dp_helper.c: In function 'drm_dp_get_adjust_request_post_cursor':\ndrivers/gpu/drm/drm_dp_helper.c:59:27: error: array subscript 10 is outside array bounds of 'const u8[6]' {aka 'const unsigned char[6]'} [-Werror=array-bounds]\n59 | return link_status[r - DP_LANE0_1_STATUS];\n| ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~\ndrivers/gpu/drm/drm_dp_helper.c:147:51: note: while referencing 'link_status'\n147 | u8 drm_dp_get_adjust_request_post_cursor(const u8 link_status[DP_LINK_STATUS_SIZE],\n| ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\nReplace the only user of the helper with an open-coded fetch and decode,\nsimilar to drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c."], "name": "CVE-2022-49218", "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": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49218\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49218\nhttps://lore.kernel.org/linux-cve-announce/2025022621-CVE-2022-49218-26ee@gregkh/T"], "threat_severity": "Moderate"}

{}