{"id":"CVE-2026-89807","title":"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 …","summary":"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 …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 < 19c73848493ab58e39649700da6de11710a36de1","Linux >= 48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 < ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21","Linux >= 48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 < c643c229babe2e8efc5eefe60e19d44868a643ff","Linux >= 48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 < 6aa530642f95d5c48aa336416f94a35e7949b647","Linux 6.11"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T11:16:45.817","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89807","references":[{"url":"https://git.kernel.org/stable/c/19c73848493ab58e39649700da6de11710a36de1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6aa530642f95d5c48aa336416f94a35e7949b647","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c643c229babe2e8efc5eefe60e19d44868a643ff","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:54.006Z","epss":0.002,"epssPercentile":0.10118,"slug":"CVE-2026-89807","body":"## Overview\n\nIn 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().\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}