{"id":"CVE-2026-97496","revision":"7ec5bdf868304a9bb7fa61f66346f5c4","records":[{"revision":"7ec5bdf868304a9bb7fa61f66346f5c4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-97496","aliases":[],"title":"drm/amdkfd: Fix OOB memory exposure in get_wave_state()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Fix OOB memory exposure in get_wave_state()\n\nThe get_wave_state() function for v9 trusts cp_hqd_cntl_stack_size and\ncp_hqd_cntl_stack_offset values read directly from the MQD, which are\nwritten by GPU microcode and fully attacker-controlled on the\nCRIU-restore path (via AMDKFD_IOC_RESTORE_PROCESS with H3).\n\nthis leads to an unbounded copy_to_user() that can leak adjacent\nGTT/kernel memory. If offset > size, integer underflow produces a ~4 GiB\nread length, if size is set to 1 MiB against a 4 KiB allocation, we leak\n1 MiB of adjacent kernel memory (other queues' MQDs, ring buffers, KASLR\npointers).\n\nFix by clamping both cp_hqd_cntl_stack_size to the actual allocated\nbuffer size (q->ctl_stack_size) and cp_hqd_cntl_stack_offset to the\nclamped size before performing arithmetic and copy_to_user().\n\nThis ensures we never read beyond the allocated kernel BO regardless of\nattacker-supplied MQD field values.","state":0,"publishedAt":"2026-09-24T16:04:43.625+00:00","modifiedAt":"2026-10-03T10:58:59.453+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_mqd_manager_v9.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"42c6c48214b726c30918e8dc80e2168607d13ae4\",\n                            \"lessThan\": \"e2bef0f168be46692a6b900916ff5da3771480ed\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"42c6c48214b726c30918e8dc80e2168607d13ae4\",\n                            \"lessThan\": \"d9183d974ddd5f09d029beaf359275ac20d4d5fe\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"42c6c48214b726c30918e8dc80e2168607d13ae4\",\n                            \"lessThan\": \"ec646686613d8ab05b282d1463a7baa49fd6b83b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"42c6c48214b726c30918e8dc80e2168607d13ae4\",\n                            \"lessThan\": \"7ef144458f48d5589e36f1b3d83e83db2e5c5ba5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\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_mqd_manager_v9.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.18\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.18\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.111\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\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:N/A:H","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/e2bef0f168be46692a6b900916ff5da3771480ed","https://git.kernel.org/stable/c/d9183d974ddd5f09d029beaf359275ac20d4d5fe","https://git.kernel.org/stable/c/ec646686613d8ab05b282d1463a7baa49fd6b83b","https://git.kernel.org/stable/c/7ef144458f48d5589e36f1b3d83e83db2e5c5ba5"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-97496","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-97496","identifiers":["CVE-2026-97496"]},"retained":false,"historicalAffected":[]}],"coverage":[]}