242 lines
13 KiB
JSON
242 lines
13 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-2026-74447",
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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": "2026-08-15T05:44:03.898Z",
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"datePublished": "2026-08-15T12:26:53.305Z",
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"dateUpdated": "2026-10-16T19:05:46.230Z"
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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": "2026-08-17T05:47:18.735Z"
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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/amdkfd: fix uint32_t overflow in EOP ring buffer size alignment\n\neop_ring_buffer_size in struct queue_properties is a u32. In\nkfd_queue_acquire_buffers() the expected EOP buffer size is computed as\nALIGN(eop_ring_buffer_size, PAGE_SIZE); ALIGN uses typeof(x), so the\naddition is done in 32-bit. A user-supplied size of 0xFFFFF001 wraps to\n0, causing kfd_queue_buffer_get() to skip its exact-size check (gated on\nsize != 0) and accept any BO mapped at the address. On GFX8/GFX9 the MQD\ncp_hqd_eop_control is then programmed for an 8KB EOP ring backed by a 4KB\nBO, so CP EOP writes can land past the buffer and fault the GPU.\n\nCast the operand to u64 so the alignment is computed in 64-bit; the size\ncheck in kfd_queue_buffer_get() then rejects the oversized request.\n\n(cherry picked from commit ae443117b742c357bfef3a7bddabf76fcf86e9ef)"
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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:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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 - Exploitation requires local ioctl access to /dev/kfd (KFD_IOC_CREATE_QUEUE) after opening the AMDGPU render node; there is no network, adjacent-wireless, or physical-device path to the vulnerable kfd_queue_acquire_buffers() code.\nAC:L - An attacker who can open /dev/kfd and map GPU buffers can reliably bypass the EOP size check with eop_buffer_size=0xFFFFF001 (32-bit ALIGN wraps to 0) and trigger CP EOP writes by submitting compute work on the created queue.\nPR:L - Only a local unprivileged user with AMDGPU/KFD access (typically membership in the render group for /dev/dri/renderD* and /dev/kfd) is required; no real-root or init-namespace capabilities are needed.\nUI:N - No victim interaction is required; the attacker drives the full chain via their own KFD and DRM file descriptors, GPU memory mappings, and queue submission.\nS:U - The bug corrupts GPU virtual memory within the attacker's own process VMID and can fault or reset the shared GPU; it does not cross a VM/host, IOMMU, or sandbox security boundary into another authority.\nC:H - CP hardware performs out-of-bounds EOP writes up to 8KB into a 4KB backing object, corrupting adjacent GPU-mapped memory that can be read back or chained into further memory disclosure primitives.\nI:H - The MQD is programmed with an 8KB EOP ring while only a 4KB buffer is validated, causing the GPU command processor to write attacker-triggered data past the buffer end into adjacent GPU mappings.\nA:H - EOP writes beyond the undersized buffer cause GPU VM faults that can hang the device and schedule amdgpu_amdkfd_gpu_reset(), denying GPU service to all co-located workloads on shared cloud/HPC/desktop GPUs."
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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/amdkfd/kfd_queue.c"
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],
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"versions": [
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{
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"version": "ee0dc6c66a913260311876a4b2b53fe0b9bc3f94",
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"lessThan": "273548eb997c6be85230c1236b18784b09f6203c",
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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": "acfc84cfa70aca5b970faf152979bc97b9f8b0c0",
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"lessThan": "6dc0b4b39ed4f11ef70f76ecea8537e35f45342b",
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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": "42ea9cf2f16b7131cb7302acb3dac510968f8bdc",
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"lessThan": "7c54bd225d83bc1bcb44430ed4b4d3a5c36b1961",
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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": "42ea9cf2f16b7131cb7302acb3dac510968f8bdc",
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"lessThan": "83463a96ea3c7d8ae636a4d6a0ba63c9ce410724",
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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": "c6ce687077cc67e4f3cbd0c89cb356fbbce91f4c",
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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": "6.12.75",
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"lessThan": "6.12.103",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.18.16",
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"lessThan": "6.18.44",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.19.6",
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"lessThan": "6.20",
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"status": "affected",
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"versionType": "semver"
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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/amdkfd/kfd_queue.c"
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],
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"versions": [
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{
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"version": "7.0",
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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": "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": "6.12.103",
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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": "6.18.44",
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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": "7.1.8",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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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"nodes": [
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.12.75",
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"versionEndExcluding": "6.12.103"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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/273548eb997c6be85230c1236b18784b09f6203c"
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},
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{
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"url": "https://git.kernel.org/stable/c/6dc0b4b39ed4f11ef70f76ecea8537e35f45342b"
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},
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{
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"url": "https://git.kernel.org/stable/c/7c54bd225d83bc1bcb44430ed4b4d3a5c36b1961"
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},
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{
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"url": "https://git.kernel.org/stable/c/83463a96ea3c7d8ae636a4d6a0ba63c9ce410724"
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}
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],
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"title": "drm/amdkfd: fix uint32_t overflow in EOP ring buffer size alignment",
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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-2026-74447",
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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": "2026-10-16T18:56:43.690802Z"
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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": "2026-10-16T19:05:46.230Z"
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}
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}
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} |