CVE-2024-46813

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There is no network-facing path to dc_get_link_at_index().\nAC:L - On an affected platform (DCN3.1-class hardware with 4 USB4 DPIA links plus a VBIOS reporting enough connector indices to push link_count past MAX_LINKS) the out-of-bounds access occurs deterministically on every driver load, and the subsequent use of the corrupted ddc.handle is reached reliably by enabling HDCP. No unpredictable memory-layout or timing condition must be won.\nPR:L - The out-of-bounds read and type-confused write occur during unprivileged driver initialization, and the corrupted HDCP DDC handle is subsequently dereferenced through the Content Protection connector property, which a local user with access to /dev/dri can set via the DRM atomic ioctl. No root or CAP_SYS_ADMIN is required.\nUI:N - The out-of-bounds indexing happens automatically at driver probe with no victim action, and the follow-on HDCP DDC path is driven entirely by the attacker's own DRM ioctls.\nS:U - The out-of-bounds access and the resulting corruption are confined to kernel memory within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The out-of-bounds read pulls adjacent struct dc members (link_srv, current_state, res_pool, clk_mgr) and treats them as a struct dc_link, so subsequent field reads and the HDCP DDC read_dpcd/read_i2c calls interpret arbitrary kernel memory as link state, and the resulting memory corruption can be leveraged for further information disclosure.\nI:H - The type-confused pointer is written through (link->priv = aconnector, link->psr_settings.* = ...), corrupting a live kernel object such as struct link_service or dc_state that contains function pointers, giving a memory-corruption primitive exploitable for control-flow hijacking.\nA:H - Dereferencing an out-of-bounds pointer read as a struct dc_link, and corrupting adjacent live kernel structures, reliably produces a kernel oops/panic and leaves the display subsystem in an inconsistent state."}]}], "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/core/dc_link_exports.c"], "versions": [{"version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "8ad4c2cf6c1af18f556e5c591fb313b2982ddf60", "status": "affected", "versionType": "git"}, {"version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "032c5407a608ac3b2a98bf4fbda27d12c20c5887", "status": "affected", "versionType": "git"}, {"version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "ac04759b4a002969cf0f1384f1b8bb2001cfa782", "status": "affected", "versionType": "git"}, {"version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "8aa2864044b9d13e95fe224f32e808afbf79ecdf", "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/core/dc_link_exports.c"], "versions": [{"version": "4.15", "status": "affected"}, {"version": "0", "lessThan": "4.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.87", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.10.9", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11", "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": "4.15", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.6.87"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.10.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.11"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8ad4c2cf6c1af18f556e5c591fb313b2982ddf60"}, {"url": "https://git.kernel.org/stable/c/032c5407a608ac3b2a98bf4fbda27d12c20c5887"}, {"url": "https://git.kernel.org/stable/c/ac04759b4a002969cf0f1384f1b8bb2001cfa782"}, {"url": "https://git.kernel.org/stable/c/8aa2864044b9d13e95fe224f32e808afbf79ecdf"}], "title": "drm/amd/display: Check link_index before accessing dc->links[]", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-09-29T14:18:36.575115Z", "id": "CVE-2024-46813", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-29T14:18:48.301Z"}}]}}

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There is no network-facing path to dc_get_link_at_index().\nAC:L - On an affected platform (DCN3.1-class hardware with 4 USB4 DPIA links plus a VBIOS reporting enough connector indices to push link_count past MAX_LINKS) the out-of-bounds access occurs deterministically on every driver load, and the subsequent use of the corrupted ddc.handle is reached reliably by enabling HDCP. No unpredictable memory-layout or timing condition must be won.\nPR:L - The out-of-bounds read and type-confused write occur during unprivileged driver initialization, and the corrupted HDCP DDC handle is subsequently dereferenced through the Content Protection connector property, which a local user with access to /dev/dri can set via the DRM atomic ioctl. No root or CAP_SYS_ADMIN is required.\nUI:N - The out-of-bounds indexing happens automatically at driver probe with no victim action, and the follow-on HDCP DDC path is driven entirely by the attacker's own DRM ioctls.\nS:U - The out-of-bounds access and the resulting corruption are confined to kernel memory within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The out-of-bounds read pulls adjacent struct dc members (link_srv, current_state, res_pool, clk_mgr) and treats them as a struct dc_link, so subsequent field reads and the HDCP DDC read_dpcd/read_i2c calls interpret arbitrary kernel memory as link state, and the resulting memory corruption can be leveraged for further information disclosure.\nI:H - The type-confused pointer is written through (link->priv = aconnector, link->psr_settings.* = ...), corrupting a live kernel object such as struct link_service or dc_state that contains function pointers, giving a memory-corruption primitive exploitable for control-flow hijacking.\nA:H - Dereferencing an out-of-bounds pointer read as a struct dc_link, and corrupting adjacent live kernel structures, reliably produces a kernel oops/panic and leaves the display subsystem in an inconsistent state."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "8ad4c2cf6c1af18f556e5c591fb313b2982ddf60", "versionType": "git"}, {"status": "affected", "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "032c5407a608ac3b2a98bf4fbda27d12c20c5887", "versionType": "git"}, {"status": "affected", "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "ac04759b4a002969cf0f1384f1b8bb2001cfa782", "versionType": "git"}, {"status": "affected", "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "8aa2864044b9d13e95fe224f32e808afbf79ecdf", "versionType": "git"}], "programFiles": ["drivers/gpu/drm/amd/display/dc/core/dc_link_exports.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.15"}, {"status": "unaffected", "version": "0", "lessThan": "4.15", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.191", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.87", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.10.9", "versionType": "semver", "lessThanOrEqual": "6.10.*"}, {"status": "unaffected", "version": "6.11", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/gpu/drm/amd/display/dc/core/dc_link_exports.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/8ad4c2cf6c1af18f556e5c591fb313b2982ddf60"}, {"url": "https://git.kernel.org/stable/c/032c5407a608ac3b2a98bf4fbda27d12c20c5887"}, {"url": "https://git.kernel.org/stable/c/ac04759b4a002969cf0f1384f1b8bb2001cfa782"}, {"url": "https://git.kernel.org/stable/c/8aa2864044b9d13e95fe224f32e808afbf79ecdf"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Check link_index before accessing dc->links[]\n\n[WHY & HOW]\ndc->links[] has max size of MAX_LINKS and NULL is return when trying to\naccess with out-of-bound index.\n\nThis fixes 3 OVERRUN and 1 RESOURCE_LEAK issues reported by Coverity."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.191", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.87", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.10.9", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.11", "versionStartIncluding": "4.15"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:19:22.335Z"}}}, "cveMetadata": {"cveId": "CVE-2024-46813", "state": "PUBLISHED", "dateUpdated": "2026-10-30T12:19:22.335Z", "dateReserved": "2024-09-11T15:12:18.283Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-09-27T12:35:55.786Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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Esto soluciona 3 problemas de OVERRUN y 1 RESOURCE_LEAK informados por Coverity."}], "id": "CVE-2024-46813", "lastModified": "2026-10-30T13:17:36.323", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-46813", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-29T14:18:36.575115Z", "version": "2.0.3"}}]}, "published": "2024-09-27T13:15:14.230", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/032c5407a608ac3b2a98bf4fbda27d12c20c5887"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8aa2864044b9d13e95fe224f32e808afbf79ecdf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8ad4c2cf6c1af18f556e5c591fb313b2982ddf60"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ac04759b4a002969cf0f1384f1b8bb2001cfa782"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-129"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: drm/amd/display: Check link_index before accessing dc->links[]", "id": "2315164", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2315164"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-129", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/amd/display: Check link_index before accessing dc->links[]\n[WHY & HOW]\ndc->links[] has max size of MAX_LINKS and NULL is return when trying to\naccess with out-of-bound index.\nThis fixes 3 OVERRUN and 1 RESOURCE_LEAK issues reported by Coverity."], "name": "CVE-2024-46813", "package_state": [{"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": "2024-09-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-46813\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-46813\nhttps://lore.kernel.org/linux-cve-announce/2024092711-CVE-2024-46813-5eb9@gregkh/T"], "threat_severity": "Moderate"}

{}