289 lines
15 KiB
JSON
289 lines
15 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-64219",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-07-19T15:36:31.770Z",
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"datePublished": "2026-07-24T15:23:06.379Z",
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"dateUpdated": "2026-10-19T20:28:15.578Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:40:07.374Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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)"
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/amd/display/dc/core/dc.c"
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],
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"versions": [
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{
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"version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6",
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"lessThan": "d6590e3f766e3111dd1beaf88b9384d117acfa6b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6",
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"lessThan": "16a5fa57565afb6bf37e18129921c270c93d8e2b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6",
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"lessThan": "90c398e822ca76e40548df0c061dd4f93ea92d71",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6",
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"lessThan": "3265f3ed373fb8048be713aadcdf702579a0e53d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6",
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"lessThan": "1ecde19bfce6535bffddad1139ff466b6d401b8e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6",
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"lessThan": "1c8c6e912f2945b2a3e669afca6b52174b88e86e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4f8e37dbaf584de6d38f58b3000b0bfd7eaf2ff6",
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"lessThan": "6c92f6d9600efa3ef0d9e560a2b52776d9803c29",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/amd/display/dc/core/dc.c"
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],
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"versions": [
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{
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"version": "5.13",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.13",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.209",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.175",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.142",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.92",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.34",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.0.11",
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"lessThanOrEqual": "7.0.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.13",
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"versionEndExcluding": "5.15.209"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.13",
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"versionEndExcluding": "6.1.175"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.13",
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"versionEndExcluding": "6.6.142"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.13",
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"versionEndExcluding": "6.12.92"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.13",
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"versionEndExcluding": "6.18.34"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.13",
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"versionEndExcluding": "7.0.11"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.13",
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"versionEndExcluding": "7.1"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/d6590e3f766e3111dd1beaf88b9384d117acfa6b"
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},
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{
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"url": "https://git.kernel.org/stable/c/16a5fa57565afb6bf37e18129921c270c93d8e2b"
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},
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{
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"url": "https://git.kernel.org/stable/c/90c398e822ca76e40548df0c061dd4f93ea92d71"
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},
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{
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"url": "https://git.kernel.org/stable/c/3265f3ed373fb8048be713aadcdf702579a0e53d"
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},
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{
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"url": "https://git.kernel.org/stable/c/1ecde19bfce6535bffddad1139ff466b6d401b8e"
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},
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{
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"url": "https://git.kernel.org/stable/c/1c8c6e912f2945b2a3e669afca6b52174b88e86e"
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},
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{
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"url": "https://git.kernel.org/stable/c/6c92f6d9600efa3ef0d9e560a2b52776d9803c29"
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}
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],
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"title": "drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-64219",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:37:34.646600Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-121",
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"description": "CWE-121 Stack-based Buffer Overflow"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-19T20:28:15.578Z"
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}
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}
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]
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}
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} |