{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80747", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.790Z", "datePublished": "2026-09-03T08:26:28.938Z", "dateUpdated": "2026-09-04T04:58:27.054Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-04T04:58:27.054Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Add bounds check for CRAT subtype length\n\nThe CRAT parser validates that the subtype header fits within the image,\nbut does not verify that the advertised subtype length fits. A malformed\nCRAT table with an oversized length field causes out-of-bounds reads when\nkfd_parse_subtype() casts the header to specific subtype structures.\n\nAdd validation that sub_type_hdr + length does not exceed the image\nboundary before parsing the subtype contents.\n\n(cherry picked from commit 48e1d1e6e8798aef0312e68d8e586021b5b3cf4d)"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H", "baseScore": 8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable kfd_parse_crat_table() runs only during amdgpu/amdkfd bring-up (kfd_topology_init at module load and kfd_topology_add_device on GPU probe). On affected kernels, ACPI CRAT is copied from firmware via acpi_get_table(\"CRAT\"); there is no network, ioctl, or /dev/kfd path to this parser.\nAC:L - A malicious ACPI CRAT can set subtype length so only the 8-byte generic header fits in the remaining image while kfd_parse_subtype() casts to larger structs (cache, CU, iolink). The out-of-bounds read is deterministic at boot with no races or attacker-uncontrollable memory layout.\nPR:N - Exploitation requires only a crafted ACPI CRAT in platform firmware/UEFI parsed automatically at boot via kfd_create_crat_image_acpi(). No Linux user account, capability, or /dev/kfd access is needed; only control of firmware-supplied CRAT contents before KFD topology initialization.\nUI:N - CRAT parsing occurs automatically during kernel boot and amdgpu/KFD module initialization when topology is built. No user mount, file open, or other discretionary action is required beyond powering on hardware that contains the malicious ACPI table.\nS:U - Impact is confined to kernel heap out-of-bounds reads and corrupted topology metadata within the host kernel security domain. This is not a guest/host VM escape, container sandbox breakout, or IOMMU/DMA boundary bypass.\nC:H - kfd_parse_subtype() casts the generic header to large subtype structures and reads past the CRAT buffer boundary (e.g., cache sibling_map[32], iolink, computeunit fields). Leaked adjacent kernel heap bytes populate topology objects exposed via world-readable /sys/class/kfd/kfd/topology/ attributes (0444).\nI:L - Out-of-bounds read values (sizes, proximity domains, sibling maps, bandwidth fields) are stored into kmalloc'd kernel topology structures (mem_props, cache_props, io_link_props), modifying kernel metadata with attacker-influenced data derived from reads past the allocation.\nA:H - Out-of-bounds reads during early init can dereference unmapped pages and trigger a kernel oops or panic during amdgpu/KFD bring-up. Related malformed-CRAT parser bugs at the same code path also cause infinite-loop denial of service, confirming high availability impact from CRAT parsing flaws."}]}], "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/amdkfd/kfd_crat.c"], "versions": [{"version": "5b5c4e40a37e858e2bff8cd91be8e972256392c4", "lessThan": "ca91e0cc8087568e4b791648a7c01e804f48cb73", "status": "affected", "versionType": "git"}, {"version": "5b5c4e40a37e858e2bff8cd91be8e972256392c4", "lessThan": "6e7566ba4739dd573c331adde1c96690f7a567bd", "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/amdkfd/kfd_crat.c"], "versions": [{"version": "3.19", "status": "affected"}, {"version": "0", "lessThan": "3.19", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.10", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "3.19", "versionEndExcluding": "7.1.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ca91e0cc8087568e4b791648a7c01e804f48cb73"}, {"url": "https://git.kernel.org/stable/c/6e7566ba4739dd573c331adde1c96690f7a567bd"}], "title": "drm/amdkfd: Add bounds check for CRAT subtype length", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/amdkfd/kfd_crat.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ca91e0cc8087568e4b791648a7c01e804f48cb73", "status": "affected", "version": "5b5c4e40a37e858e2bff8cd91be8e972256392c4", "versionType": "git"}, {"lessThan": "6e7566ba4739dd573c331adde1c96690f7a567bd", "status": "affected", "version": "5b5c4e40a37e858e2bff8cd91be8e972256392c4", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/amdkfd/kfd_crat.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.19"}, {"lessThan": "3.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Add bounds check for CRAT subtype length\n\nThe CRAT parser validates that the subtype header fits within the image,\nbut does not verify that the advertised subtype length fits. A malformed\nCRAT table with an oversized length field causes out-of-bounds reads when\nkfd_parse_subtype() casts the header to specific subtype structures.\n\nAdd validation that sub_type_hdr + length does not exceed the image\nboundary before parsing the subtype contents.\n\n(cherry picked from commit 48e1d1e6e8798aef0312e68d8e586021b5b3cf4d)"}], "id": "CVE-2026-80747", "lastModified": "2026-09-04T05:17:14.673", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.5, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-03T13:06:14.303", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6e7566ba4739dd573c331adde1c96690f7a567bd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ca91e0cc8087568e4b791648a7c01e804f48cb73"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}