{"id":"CVE-2026-74447","revision":"ec15b20e3331460ebe42119ff824f17a","records":[{"revision":"ec15b20e3331460ebe42119ff824f17a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74447","aliases":[],"title":"drm/amdkfd: fix uint32_t overflow in EOP ring buffer size alignment","description":"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)","state":0,"publishedAt":"2026-08-15T12:26:53.305+00:00","modifiedAt":"2026-10-16T19:05:46.23+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/amd/amdkfd/kfd_queue.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"ee0dc6c66a913260311876a4b2b53fe0b9bc3f94\",\n                            \"lessThan\": \"273548eb997c6be85230c1236b18784b09f6203c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"acfc84cfa70aca5b970faf152979bc97b9f8b0c0\",\n                            \"lessThan\": \"6dc0b4b39ed4f11ef70f76ecea8537e35f45342b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"42ea9cf2f16b7131cb7302acb3dac510968f8bdc\",\n                            \"lessThan\": \"7c54bd225d83bc1bcb44430ed4b4d3a5c36b1961\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"42ea9cf2f16b7131cb7302acb3dac510968f8bdc\",\n                            \"lessThan\": \"83463a96ea3c7d8ae636a4d6a0ba63c9ce410724\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c6ce687077cc67e4f3cbd0c89cb356fbbce91f4c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.12.75\",\n                            \"lessThan\": \"6.12.103\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.16\",\n                            \"lessThan\": \"6.18.44\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.6\",\n                            \"lessThan\": \"6.20\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/amd/amdkfd/kfd_queue.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"7.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.103\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.44\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.8\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/273548eb997c6be85230c1236b18784b09f6203c","https://git.kernel.org/stable/c/6dc0b4b39ed4f11ef70f76ecea8537e35f45342b","https://git.kernel.org/stable/c/7c54bd225d83bc1bcb44430ed4b4d3a5c36b1961","https://git.kernel.org/stable/c/83463a96ea3c7d8ae636a4d6a0ba63c9ce410724"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74447","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74447","identifiers":["CVE-2026-74447"]},"retained":false,"historicalAffected":[]}],"coverage":[]}