{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-80589", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.770Z", "datePublished": "2026-08-26T14:37:43.293Z", "dateUpdated": "2026-08-26T14:37:43.293Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-26T14:37:43.293Z" }, "descriptions": [ { "lang": "en", "value": "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." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "block/genhd.c" ], "versions": [ { "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "6ae7364f68e6c7af6b6df4bbb14040b89e5975d0", "status": "affected", "versionType": "git" }, { "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "6f06dbe5012c160e0dba418a5a9cb16c456ad46a", "status": "affected", "versionType": "git" }, { "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "1a0ae4d502062a2759f2a92d12bdeab3c64c7372", "status": "affected", "versionType": "git" }, { "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "bb03b56d1d754908a37a160603be21769da423cf", "status": "affected", "versionType": "git" }, { "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "93d620519d71dfc6ee64b5baea74f1d85d4439fb", "status": "affected", "versionType": "git" }, { "version": "6f8191fdf41d3a53cc1d63fe2234e812c55a0092", "lessThan": "26cb8ebbfaf713c82e142d08828d4d765057633b", "status": "affected", "versionType": "git" }, { "version": "d27b66257db183fe11c10f31246ae965adb005d3", "status": "affected", "versionType": "git" }, { "version": "5.19.12", "lessThan": "5.20", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "block/genhd.c" ], "versions": [ { "version": "6.0", "status": "affected" }, { "version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.184", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.153", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.105", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.46", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.10", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.1.184" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.6.153" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.105" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.18.46" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.1.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/6ae7364f68e6c7af6b6df4bbb14040b89e5975d0" }, { "url": "https://git.kernel.org/stable/c/6f06dbe5012c160e0dba418a5a9cb16c456ad46a" }, { "url": "https://git.kernel.org/stable/c/1a0ae4d502062a2759f2a92d12bdeab3c64c7372" }, { "url": "https://git.kernel.org/stable/c/bb03b56d1d754908a37a160603be21769da423cf" }, { "url": "https://git.kernel.org/stable/c/93d620519d71dfc6ee64b5baea74f1d85d4439fb" }, { "url": "https://git.kernel.org/stable/c/26cb8ebbfaf713c82e142d08828d4d765057633b" } ], "title": "block: stop the timeout timer when releasing a never added disk", "x_generator": { "engine": "bippy-1.2.0" } } } }