{"id":"CVE-2026-80589","summary":"block: stop the timeout timer when releasing a never added disk","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock: stop the timeout timer when releasing a never added disk\n\ndisk_release() undoes blk_mq_init_allocated_queue() for a disk whose\nprobe failed before add_disk(), but it only calls blk_mq_exit_queue().\nNothing there stops q-\u003etimeout, and that timer rolls forward: it stays\npending until it next expires, not until the last request completes.\nSo if the driver issued any I/O before adding the disk, the\nrequest_queue is freed while still linked into a timer wheel bucket.\n\nCommit 6f8191fdf41d (\"block: simplify disk shutdown\") dropped the\nblk_cleanup_queue() call that used to stop it.  __del_gendisk() and\nblk_mq_destroy_queue() still do; only the probe failure path lost it.\n\nnvme gets there because nvme_update_ns_info() submits Report Zones or\nFDP io-mgmt-recv on ns-\u003equeue before the disk is added, so a later\nfailure - a concurrent reset setting NVME_CTRL_FROZEN, or\ndevice_add_disk() failing - lands in put_disk() with the timer armed:\n\n  BUG: KASAN: slab-use-after-free in detach_if_pending+0x30c/0x340\n  Write of size 8 at addr ffff888004d71310 by task kworker/u8:2/37\n   __timer_delete_sync+0x156/0x240 kernel/time/timer.c:1621\n   blk_sync_queue+0x22/0x40 block/blk-core.c:222\n   nvme_sync_queues+0x100/0x150 drivers/nvme/host/core.c:5362\n   nvme_reset_work+0x138/0x930 drivers/nvme/host/pci.c:3264\n\n  Allocated by task 34:\n   __blk_mq_alloc_disk+0x33/0x100 block/blk-mq.c:4462\n   nvme_alloc_ns+0x290/0x3870 drivers/nvme/host/core.c:4146\n\n  Freed by task 0:\n   blk_free_queue_rcu+0x3a/0x50 block/blk-core.c:254\n   rcu_core+0xc10/0x1730 kernel/rcu/tree.c:2857\n\nThe queue being synced there is ctrl-\u003eadmin_q, only a victim sharing a\ntimer wheel bucket with the freed queue's dangling entry; other runs\ntripped in enqueue_timer(), __run_timers() or blk_mq_timeout_work().\nFailing nvme_alloc_ns() with a debug patch makes it deterministic: one\nleaked timer trips KASAN within seconds, while 1987 patched releases\nproduced no splat.\n\nStop the timer and the queue work items before blk_mq_exit_queue(), like\nblk_mq_destroy_queue() does.\n\nFound by FuzzNvme.","modified":"2026-08-28T03:47:29.347624198Z","published":"2026-08-26T14:37:43.293Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80589.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1a0ae4d502062a2759f2a92d12bdeab3c64c7372"},{"type":"WEB","url":"https://git.kernel.org/stable/c/26cb8ebbfaf713c82e142d08828d4d765057633b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6ae7364f68e6c7af6b6df4bbb14040b89e5975d0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6f06dbe5012c160e0dba418a5a9cb16c456ad46a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/93d620519d71dfc6ee64b5baea74f1d85d4439fb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bb03b56d1d754908a37a160603be21769da423cf"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80589.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80589"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6f8191fdf41d3a53cc1d63fe2234e812c55a0092"},{"fixed":"6ae7364f68e6c7af6b6df4bbb14040b89e5975d0"},{"fixed":"6f06dbe5012c160e0dba418a5a9cb16c456ad46a"},{"fixed":"1a0ae4d502062a2759f2a92d12bdeab3c64c7372"},{"fixed":"bb03b56d1d754908a37a160603be21769da423cf"},{"fixed":"93d620519d71dfc6ee64b5baea74f1d85d4439fb"},{"fixed":"26cb8ebbfaf713c82e142d08828d4d765057633b"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"d27b66257db183fe11c10f31246ae965adb005d3"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.19.12"},{"fixed":"5.20"}]}],"versions":["v5.19.11","v5.19.10","v5.19.9","v5.19.8","v5.19.7","v5.19.6","v5.19","v5.19.5","v5.19.4","v5.19.3","v5.19.2","v5.19.1","v5.19-rc1","v5.19-rc5","v5.19-rc8","v5.19-rc6","v5.18","v5.19-rc2","v5.19-rc7","v5.19-rc3","v5.19-rc4","v5.18-rc1","v5.18-rc7","v5.18-rc2","v5.18-rc5","v5.17","v5.18-rc4","v5.18-rc3","v5.18-rc6","v5.17-rc6","v5.17-rc4","v5.17-rc8","v5.17-rc7","v5.17-rc1","v5.17-rc3","v5.17-rc2","v5.17-rc5","v5.16","v5.16-rc1","v5.16-rc8","v5.16-rc5","v5.16-rc6","v5.16-rc7","v5.16-rc3","v5.16-rc2","v5.16-rc4","v5.15","v5.15-rc2","v5.15-rc1","v5.15-rc4","v5.15-rc7","v5.15-rc3","v5.15-rc5","v5.15-rc6","v5.14","v5.14-rc3","v5.14-rc1","v5.14-rc2","v5.14-rc7","v5.14-rc6","v5.13-rc1","v5.14-rc5","v5.14-rc4","v5.13","v5.13-rc6","v5.13-rc7","v5.13-rc3","v5.13-rc2","v5.13-rc4","v5.13-rc5","v5.12","v5.12-rc2","v5.12-rc1-dontuse","v5.12-rc1","v5.12-rc8","v5.12-rc3","v5.12-rc7","v5.12-rc5","v5.12-rc6","v5.12-rc4","v5.10","v5.11","v5.11-rc3","v5.11-rc7","v5.11-rc6","v5.11-rc5","v5.11-rc1","v5.11-rc4","v5.11-rc2","v5.10-rc1","v5.10-rc7","v5.10-rc4","v5.10-rc3","v5.10-rc6","v5.9","v5.10-rc2","v5.10-rc5","v5.9-rc1","v5.9-rc7","v5.9-rc8","v5.9-rc6","v5.9-rc4","v5.9-rc5","v5.9-rc3","v5.9-rc2","v5.8","v5.7","v5.8-rc2","v5.8-rc1","v5.8-rc7","v5.8-rc5","v5.8-rc3","v5.8-rc4","v5.8-rc6","v5.7-rc4","v5.7-rc7","v5.7-rc1","v5.7-rc3","v5.7-rc2","v5.7-rc5","v5.7-rc6","v5.6","v5.6-rc1","v5.6-rc7","v5.6-rc6","v5.6-rc3","v5.6-rc4","v5.6-rc2","v5.6-rc5","v5.5","v5.5-rc5","v5.5-rc7","v5.5-rc2","v5.5-rc1","v5.4","v5.5-rc4","v5.5-rc3","v5.5-rc6","v5.4-rc1","v5.4-rc6","v5.4-rc3","v5.4-rc4","v5.4-rc8","v5.4-rc7","v5.4-rc5","v5.3","v5.4-rc2","v5.3-rc5","v5.3-rc1","v5.3-rc2","v5.3-rc3","v5.3-rc8","v5.3-rc7","v5.3-rc4","v5.2","v5.3-rc6","v5.2-rc2","v5.2-rc7","v5.2-rc4","v5.2-rc1","v5.2-rc5","v5.2-rc6","v5.2-rc3","v5.1","v5.0-rc8","v5.1-rc7","v5.1-rc1","v5.1-rc6","v5.1-rc5","v5.0","v5.1-rc3","v5.1-rc2","v5.1-rc4","v5.0-rc1","v5.0-rc4","v5.0-rc3","v5.0-rc6","v5.0-rc7","v5.0-rc2","v5.0-rc5","v4.20-rc1","v4.19","v4.20","v4.20-rc7","v4.20-rc5","v4.20-rc6","v4.20-rc4","v4.20-rc2","v4.20-rc3","v4.19-rc2","v4.19-rc8","v4.19-rc4","v4.19-rc1","v4.19-rc7","v4.19-rc6","v4.19-rc5","v4.19-rc3","v4.18","v4.18-rc1","v4.18-rc8","v4.18-rc2","v4.18-rc5","v4.18-rc6","v4.18-rc7","v4.17","v4.18-rc3","v4.18-rc4","v4.17-rc1","v4.17-rc2","v4.17-rc7","v4.17-rc3","v4.17-rc4","v4.16","v4.17-rc6","v4.17-rc5","v4.16-rc7","v4.16-rc4","v4.16-rc1","v4.16-rc2","v4.16-rc5","v4.16-rc3","v4.16-rc6","v4.14","v4.15","v4.15-rc1","v4.15-rc4","v4.15-rc9","v4.15-rc8","v4.15-rc7","v4.15-rc3","v4.15-rc2","v4.15-rc5","v4.15-rc6","v4.14-rc1","v4.14-rc7","v4.14-rc3","v4.13","v4.14-rc8","v4.14-rc4","v4.14-rc6","v4.14-rc2","v4.14-rc5","v4.13-rc2","v4.13-rc1","v4.13-rc3","v4.13-rc7","v4.13-rc4","v4.13-rc5","v4.13-rc6","v4.12-rc1","v4.12","v4.12-rc5","v4.12-rc7","v4.12-rc6","v4.12-rc4","v4.12-rc2","v4.12-rc3","v4.11","v4.11-rc1","v4.11-rc6","v4.11-rc8","v4.11-rc7","v4.11-rc3","v4.11-rc5","v4.11-rc2","v4.11-rc4","v4.10","v4.9","v4.10-rc8","v4.10-rc3","v4.10-rc1","v4.10-rc7","v4.10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