CVE-2026-64219

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64219", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.770Z", "datePublished": "2026-07-24T15:23:06.379Z", "dateUpdated": "2026-10-19T20:28:15.578Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:40:07.374Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async\n\n[Why&How]\ndc_process_dmub_aux_transfer_async() copies payload->length bytes into a\n16-byte stack buffer (dpaux.data[16]) guarded only by an ASSERT(), which\nis a no-op in release builds. If a caller ever passes length > 16 this\nresults in a stack buffer overflow via memcpy.\n\nAdditionally, link_index is used to dereference dc->links[] without\nbounds checking against dc->link_count, risking an out-of-bounds access.\n\nReplace the ASSERT with a hard runtime check that returns false when\npayload->length exceeds the destination buffer size, and add a bounds\ncheck for link_index before it is used.\n\n(cherry picked from commit ba4caa9fecdf7a38f98c878ad05a8a64148b6881)"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The closest attack surface is the local DRM DisplayPort AUX character-device path; no network protocol reaches this function. Physical USB4/DisplayPort devices can initiate AUX activity but cannot directly supply the vulnerable length or index.\nAC:H - All current callers cap transactions at 16 bytes, while link_index is derived from an internally created dc_link. Exploitation therefore requires an abnormal internal caller or corrupted state that the attacker cannot directly create.\nPR:L - Reaching the relevant DRM/AUX interfaces requires local device access, but the traced path contains no administrative capability or init-namespace privilege check. Basic session or device-ACL access is therefore sufficient.\nUI:N - Once the attacker has local device access and the required abnormal state exists, the vulnerable copy or dereference executes without further victim action.\nS:U - The corruption occurs within the host kernel and does not inherently cross a separate virtualization, IOMMU, or other security authority boundary.\nC:H - A length greater than 40 can copy payload-controlled bytes beyond the 64-byte stack command and overwrite control data. Successful control-flow hijacking would permit arbitrary kernel-memory disclosure.\nI:H - The unbounded stack write can overwrite saved state and potentially enable kernel code execution; an invalid link_index can also dereference a wild pointer. This supports complete integrity impact.\nA:H - FORTIFY converts a sufficiently large copy into a kernel panic, while unfortified stack corruption, stack-canary failure, or the unchecked link dereference can cause an oops or crash."}]}], "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.c"], "versions": [{"version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "lessThan": "d6590e3f766e3111dd1beaf88b9384d117acfa6b", "status": "affected", "versionType": "git"}, {"version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "lessThan": "16a5fa57565afb6bf37e18129921c270c93d8e2b", "status": "affected", "versionType": "git"}, {"version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "lessThan": "90c398e822ca76e40548df0c061dd4f93ea92d71", "status": "affected", "versionType": "git"}, {"version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "lessThan": "3265f3ed373fb8048be713aadcdf702579a0e53d", "status": "affected", "versionType": "git"}, {"version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "lessThan": "1ecde19bfce6535bffddad1139ff466b6d401b8e", "status": "affected", "versionType": "git"}, {"version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "lessThan": "1c8c6e912f2945b2a3e669afca6b52174b88e86e", "status": "affected", "versionType": "git"}, {"version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "lessThan": "6c92f6d9600efa3ef0d9e560a2b52776d9803c29", "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.c"], "versions": [{"version": "5.13", "status": "affected"}, {"version": "0", "lessThan": "5.13", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.142", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "5.13", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.6.142"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.12.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d6590e3f766e3111dd1beaf88b9384d117acfa6b"}, {"url": "https://git.kernel.org/stable/c/16a5fa57565afb6bf37e18129921c270c93d8e2b"}, {"url": "https://git.kernel.org/stable/c/90c398e822ca76e40548df0c061dd4f93ea92d71"}, {"url": "https://git.kernel.org/stable/c/3265f3ed373fb8048be713aadcdf702579a0e53d"}, {"url": "https://git.kernel.org/stable/c/1ecde19bfce6535bffddad1139ff466b6d401b8e"}, {"url": "https://git.kernel.org/stable/c/1c8c6e912f2945b2a3e669afca6b52174b88e86e"}, {"url": "https://git.kernel.org/stable/c/6c92f6d9600efa3ef0d9e560a2b52776d9803c29"}], "title": "drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-64219", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:37:34.646600Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-121", "description": "CWE-121 Stack-based Buffer Overflow"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T20:28:15.578Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-64219", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:37:34.646600Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-121", "description": "CWE-121 Stack-based Buffer Overflow"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:37:35.486Z"}}], "cna": {"title": "drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The closest attack surface is the local DRM DisplayPort AUX character-device path; no network protocol reaches this function. Physical USB4/DisplayPort devices can initiate AUX activity but cannot directly supply the vulnerable length or index.\nAC:H - All current callers cap transactions at 16 bytes, while link_index is derived from an internally created dc_link. Exploitation therefore requires an abnormal internal caller or corrupted state that the attacker cannot directly create.\nPR:L - Reaching the relevant DRM/AUX interfaces requires local device access, but the traced path contains no administrative capability or init-namespace privilege check. Basic session or device-ACL access is therefore sufficient.\nUI:N - Once the attacker has local device access and the required abnormal state exists, the vulnerable copy or dereference executes without further victim action.\nS:U - The corruption occurs within the host kernel and does not inherently cross a separate virtualization, IOMMU, or other security authority boundary.\nC:H - A length greater than 40 can copy payload-controlled bytes beyond the 64-byte stack command and overwrite control data. Successful control-flow hijacking would permit arbitrary kernel-memory disclosure.\nI:H - The unbounded stack write can overwrite saved state and potentially enable kernel code execution; an invalid link_index can also dereference a wild pointer. This supports complete integrity impact.\nA:H - FORTIFY converts a sufficiently large copy into a kernel panic, while unfortified stack corruption, stack-canary failure, or the unchecked link dereference can cause an oops or crash."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "lessThan": "d6590e3f766e3111dd1beaf88b9384d117acfa6b", "versionType": "git"}, {"status": "affected", "version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "lessThan": "16a5fa57565afb6bf37e18129921c270c93d8e2b", "versionType": "git"}, {"status": "affected", "version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "lessThan": "90c398e822ca76e40548df0c061dd4f93ea92d71", "versionType": "git"}, {"status": "affected", "version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "lessThan": "3265f3ed373fb8048be713aadcdf702579a0e53d", "versionType": "git"}, {"status": "affected", "version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "lessThan": "1ecde19bfce6535bffddad1139ff466b6d401b8e", "versionType": "git"}, {"status": "affected", "version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "lessThan": "1c8c6e912f2945b2a3e669afca6b52174b88e86e", "versionType": "git"}, {"status": "affected", "version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "lessThan": "6c92f6d9600efa3ef0d9e560a2b52776d9803c29", "versionType": "git"}], "programFiles": ["drivers/gpu/drm/amd/display/dc/core/dc.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.13"}, {"status": "unaffected", "version": "0", "lessThan": "5.13", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.209", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.175", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.142", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.92", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.34", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.11", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/gpu/drm/amd/display/dc/core/dc.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/d6590e3f766e3111dd1beaf88b9384d117acfa6b"}, {"url": "https://git.kernel.org/stable/c/16a5fa57565afb6bf37e18129921c270c93d8e2b"}, {"url": "https://git.kernel.org/stable/c/90c398e822ca76e40548df0c061dd4f93ea92d71"}, {"url": "https://git.kernel.org/stable/c/3265f3ed373fb8048be713aadcdf702579a0e53d"}, {"url": "https://git.kernel.org/stable/c/1ecde19bfce6535bffddad1139ff466b6d401b8e"}, {"url": "https://git.kernel.org/stable/c/1c8c6e912f2945b2a3e669afca6b52174b88e86e"}, {"url": "https://git.kernel.org/stable/c/6c92f6d9600efa3ef0d9e560a2b52776d9803c29"}], "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: Validate payload length and link_index in dc_process_dmub_aux_transfer_async\n\n[Why&How]\ndc_process_dmub_aux_transfer_async() copies payload->length bytes into a\n16-byte stack buffer (dpaux.data[16]) guarded only by an ASSERT(), which\nis a no-op in release builds. If a caller ever passes length > 16 this\nresults in a stack buffer overflow via memcpy.\n\nAdditionally, link_index is used to dereference dc->links[] without\nbounds checking against dc->link_count, risking an out-of-bounds access.\n\nReplace the ASSERT with a hard runtime check that returns false when\npayload->length exceeds the destination buffer size, and add a bounds\ncheck for link_index before it is used.\n\n(cherry picked from commit ba4caa9fecdf7a38f98c878ad05a8a64148b6881)"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.209", "versionStartIncluding": "5.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.175", "versionStartIncluding": "5.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.142", "versionStartIncluding": "5.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.92", "versionStartIncluding": "5.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.34", "versionStartIncluding": "5.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.11", "versionStartIncluding": "5.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1", "versionStartIncluding": "5.13"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:40:07.374Z"}}}, "cveMetadata": {"cveId": "CVE-2026-64219", "state": "PUBLISHED", "dateUpdated": "2026-10-19T20:28:15.578Z", "dateReserved": "2026-07-19T15:36:31.770Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-24T15:23:06.379Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/display/dc/core/dc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "d6590e3f766e3111dd1beaf88b9384d117acfa6b", "status": "affected", "version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "versionType": "git"}, {"lessThan": "16a5fa57565afb6bf37e18129921c270c93d8e2b", "status": "affected", "version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "versionType": "git"}, {"lessThan": "90c398e822ca76e40548df0c061dd4f93ea92d71", "status": "affected", "version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "versionType": "git"}, {"lessThan": "3265f3ed373fb8048be713aadcdf702579a0e53d", "status": "affected", "version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "versionType": "git"}, {"lessThan": "1ecde19bfce6535bffddad1139ff466b6d401b8e", "status": "affected", "version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "versionType": "git"}, {"lessThan": "1c8c6e912f2945b2a3e669afca6b52174b88e86e", "status": "affected", "version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "versionType": "git"}, {"lessThan": "6c92f6d9600efa3ef0d9e560a2b52776d9803c29", "status": "affected", "version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/display/dc/core/dc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.13"}, {"lessThan": "5.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.209", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.175", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.142", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.92", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.34", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.11", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9F743086-ED4F-414C-BC47-C10ACDAA072C", "versionEndExcluding": "5.15.209", "versionStartIncluding": "5.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "92385813-D91D-480D-83A1-F423D2CBB2BA", "versionEndExcluding": "6.1.175", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FBFF77B0-526A-4AF1-84D0-ED7187624A67", "versionEndExcluding": "6.6.142", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9CB90BD9-95B7-4D7F-9F17-4ECE6CFB66C9", "versionEndExcluding": "6.12.92", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A4B1EF6D-18D7-4838-BC37-7499D5DCC3C0", "versionEndExcluding": "6.18.34", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0520D091-FC52-4A50-AF07-70AE7D08B750", "versionEndExcluding": "7.0.11", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*", "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*", "matchCriteriaId": "E5910A9D-F60A-409A-B486-FE66BFEBA9B9", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async\n\n[Why&How]\ndc_process_dmub_aux_transfer_async() copies payload->length bytes into a\n16-byte stack buffer (dpaux.data[16]) guarded only by an ASSERT(), which\nis a no-op in release builds. If a caller ever passes length > 16 this\nresults in a stack buffer overflow via memcpy.\n\nAdditionally, link_index is used to dereference dc->links[] without\nbounds checking against dc->link_count, risking an out-of-bounds access.\n\nReplace the ASSERT with a hard runtime check that returns false when\npayload->length exceeds the destination buffer size, and add a bounds\ncheck for link_index before it is used.\n\n(cherry picked from commit ba4caa9fecdf7a38f98c878ad05a8a64148b6881)"}], "id": "CVE-2026-64219", "lastModified": "2026-10-19T21:17:27.287", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64219", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:37:34.646600Z", "version": "2.0.3"}}]}, "published": "2026-07-24T16:16:49.670", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/16a5fa57565afb6bf37e18129921c270c93d8e2b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1c8c6e912f2945b2a3e669afca6b52174b88e86e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1ecde19bfce6535bffddad1139ff466b6d401b8e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3265f3ed373fb8048be713aadcdf702579a0e53d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6c92f6d9600efa3ef0d9e560a2b52776d9803c29"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/90c398e822ca76e40548df0c061dd4f93ea92d71"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d6590e3f766e3111dd1beaf88b9384d117acfa6b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-674"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-121"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async", "id": "2506790", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2506790"}, "csaw": false, "cwe": "CWE-120", "details": ["No description is available for this CVE."], "name": "CVE-2026-64219", "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": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64219\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64219\nhttps://lore.kernel.org/linux-cve-announce/2026072416-CVE-2026-64219-75c3@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,d6590e3f766e3111dd1beaf88b9384d117acfa6b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,16a5fa57565afb6bf37e18129921c270c93d8e2b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,90c398e822ca76e40548df0c061dd4f93ea92d71)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,3265f3ed373fb8048be713aadcdf702579a0e53d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,1ecde19bfce6535bffddad1139ff466b6d401b8e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,1c8c6e912f2945b2a3e669afca6b52174b88e86e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,6c92f6d9600efa3ef0d9e560a2b52776d9803c29)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,5.15.209)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.1.175)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.6.142)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.92)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.34)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,7.0.11)"}}], "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": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.209,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.175,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.142,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.92,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.34,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.11,7.0.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "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": "2026-07-24T20:45:15.204014+00:00", "updated": "2026-10-20T04:00:14.880827+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-120", "CWE-121", "CWE-674"]}