{"id":"CVE-2026-80589","revision":"3b6b3be5ee8f4efe813ef052c695aba0","records":[{"revision":"3b6b3be5ee8f4efe813ef052c695aba0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80589","aliases":[],"title":"block: stop the timeout timer when releasing a never added disk","description":"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->timeout, 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->queue 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->admin_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.","state":0,"publishedAt":"2026-08-26T14:37:43.293+00:00","modifiedAt":"2026-10-16T19:26:29.099+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                        \"block/genhd.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6f8191fdf41d3a53cc1d63fe2234e812c55a0092\",\n                            \"lessThan\": \"6ae7364f68e6c7af6b6df4bbb14040b89e5975d0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6f8191fdf41d3a53cc1d63fe2234e812c55a0092\",\n                            \"lessThan\": \"6f06dbe5012c160e0dba418a5a9cb16c456ad46a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6f8191fdf41d3a53cc1d63fe2234e812c55a0092\",\n                            \"lessThan\": \"1a0ae4d502062a2759f2a92d12bdeab3c64c7372\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6f8191fdf41d3a53cc1d63fe2234e812c55a0092\",\n                            \"lessThan\": \"bb03b56d1d754908a37a160603be21769da423cf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6f8191fdf41d3a53cc1d63fe2234e812c55a0092\",\n                            \"lessThan\": \"93d620519d71dfc6ee64b5baea74f1d85d4439fb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6f8191fdf41d3a53cc1d63fe2234e812c55a0092\",\n                            \"lessThan\": \"26cb8ebbfaf713c82e142d08828d4d765057633b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d27b66257db183fe11c10f31246ae965adb005d3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.19.12\",\n                            \"lessThan\": \"5.20\",\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                        \"block/genhd.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.184\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.153\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.105\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.46\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.10\",\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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/6ae7364f68e6c7af6b6df4bbb14040b89e5975d0","https://git.kernel.org/stable/c/6f06dbe5012c160e0dba418a5a9cb16c456ad46a","https://git.kernel.org/stable/c/1a0ae4d502062a2759f2a92d12bdeab3c64c7372","https://git.kernel.org/stable/c/bb03b56d1d754908a37a160603be21769da423cf","https://git.kernel.org/stable/c/93d620519d71dfc6ee64b5baea74f1d85d4439fb","https://git.kernel.org/stable/c/26cb8ebbfaf713c82e142d08828d4d765057633b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80589","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80589","identifiers":["CVE-2026-80589"]},"retained":false,"historicalAffected":[]}],"coverage":[]}