{"id":"CVE-2026-89807","state":"PUBLISHED","title":"drm/amdkfd: guard against NULL restore_mqd in CRIU queue restore","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: guard against NULL restore_mqd in CRIU queue restore\n\nBoth create_queue_cpsch() and create_queue_nocpsch() unconditionally\ncall mqd_mgr->restore_mqd() when a CRIU restore is in progress\n(qd != NULL), with no NULL guard. On any system where restore_mqd is\nnot implemented for the given queue type, a user holding\nCAP_CHECKPOINT_RESTORE can trigger a kernel NULL pointer dereference\nand panic the machine by issuing KFD_IOC_CRIU_OP_RESTORE with a\ncrafted queue restore object. Note that checkpoint_mqd is likewise\nunimplemented on GFX12, so no legitimate CRIU image can reach this\npath — only a hand-crafted restore payload.\n\nAdd a NULL guard for restore_mqd immediately after mqd_mgr is\nresolved, unwinding via the existing error labels and returning\n-EOPNOTSUPP if the callback is not implemented. This mirrors the\nexisting checkpoint_mqd guard in checkpoint_mqd().","publishedAt":"2026-09-16T10:30:40.572Z","updatedAt":"2026-10-19T08:53:01.788Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"48f0bdf4e38e42b8285622cfcfc7e6e490b1a719","status":"affected","lessThan":"19c73848493ab58e39649700da6de11710a36de1","versionType":"git"},{"version":"48f0bdf4e38e42b8285622cfcfc7e6e490b1a719","status":"affected","lessThan":"ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21","versionType":"git"},{"version":"48f0bdf4e38e42b8285622cfcfc7e6e490b1a719","status":"affected","lessThan":"c643c229babe2e8efc5eefe60e19d44868a643ff","versionType":"git"},{"version":"48f0bdf4e38e42b8285622cfcfc7e6e490b1a719","status":"affected","lessThan":"6aa530642f95d5c48aa336416f94a35e7949b647","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.11","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c"]}],"references":["https://git.kernel.org/stable/c/19c73848493ab58e39649700da6de11710a36de1","https://git.kernel.org/stable/c/ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21","https://git.kernel.org/stable/c/c643c229babe2e8efc5eefe60e19d44868a643ff","https://git.kernel.org/stable/c/6aa530642f95d5c48aa336416f94a35e7949b647"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89807.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89807","state":"PUBLISHED","datePublished":"2026-09-16T10:30:40.572Z","dateUpdated":"2026-10-19T08:53:01.788Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.767Z"},"containers":{"cna":{"title":"drm/amdkfd: guard against NULL restore_mqd in CRIU queue restore","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: guard against NULL restore_mqd in CRIU queue restore\n\nBoth create_queue_cpsch() and create_queue_nocpsch() unconditionally\ncall mqd_mgr->restore_mqd() when a CRIU restore is in progress\n(qd != NULL), with no NULL guard. On any system where restore_mqd is\nnot implemented for the given queue type, a user holding\nCAP_CHECKPOINT_RESTORE can trigger a kernel NULL pointer dereference\nand panic the machine by issuing KFD_IOC_CRIU_OP_RESTORE with a\ncrafted queue restore object. Note that checkpoint_mqd is likewise\nunimplemented on GFX12, so no legitimate CRIU image can reach this\npath — only a hand-crafted restore payload.\n\nAdd a NULL guard for restore_mqd immediately after mqd_mgr is\nresolved, unwinding via the existing error labels and returning\n-EOPNOTSUPP if the callback is not implemented. This mirrors the\nexisting checkpoint_mqd guard in checkpoint_mqd()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"48f0bdf4e38e42b8285622cfcfc7e6e490b1a719","status":"affected","lessThan":"19c73848493ab58e39649700da6de11710a36de1","versionType":"git"},{"version":"48f0bdf4e38e42b8285622cfcfc7e6e490b1a719","status":"affected","lessThan":"ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21","versionType":"git"},{"version":"48f0bdf4e38e42b8285622cfcfc7e6e490b1a719","status":"affected","lessThan":"c643c229babe2e8efc5eefe60e19d44868a643ff","versionType":"git"},{"version":"48f0bdf4e38e42b8285622cfcfc7e6e490b1a719","status":"affected","lessThan":"6aa530642f95d5c48aa336416f94a35e7949b647","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.11","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/19c73848493ab58e39649700da6de11710a36de1"},{"url":"https://git.kernel.org/stable/c/ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21"},{"url":"https://git.kernel.org/stable/c/c643c229babe2e8efc5eefe60e19d44868a643ff"},{"url":"https://git.kernel.org/stable/c/6aa530642f95d5c48aa336416f94a35e7949b647"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:53:01.788Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.18.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"7.2.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}