{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53765","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-12-08T01:18:04.281Z","datePublished":"2025-12-08T01:19:27.831Z","dateUpdated":"2026-05-11T19:51:15.067Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:51:15.067Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm cache: free background tracker's queued work in btracker_destroy\n\nOtherwise the kernel can BUG with:\n\n[ 2245.426978] =============================================================================\n[ 2245.435155] BUG bt_work (Tainted: G    B   W         ): Objects remaining in bt_work on __kmem_cache_shutdown()\n[ 2245.445233] -----------------------------------------------------------------------------\n[ 2245.445233]\n[ 2245.454879] Slab 0x00000000b0ce2b30 objects=64 used=2 fp=0x000000000a3c6a4e flags=0x17ffffc0000200(slab|node=0|zone=2|lastcpupid=0x1fffff)\n[ 2245.467300] CPU: 7 PID: 10805 Comm: lvm Kdump: loaded Tainted: G    B   W          6.0.0-rc2 #19\n[ 2245.476078] Hardware name: Dell Inc. PowerEdge R7525/0590KW, BIOS 2.5.6 10/06/2021\n[ 2245.483646] Call Trace:\n[ 2245.486100]  <TASK>\n[ 2245.488206]  dump_stack_lvl+0x34/0x48\n[ 2245.491878]  slab_err+0x95/0xcd\n[ 2245.495028]  __kmem_cache_shutdown.cold+0x31/0x136\n[ 2245.499821]  kmem_cache_destroy+0x49/0x130\n[ 2245.503928]  btracker_destroy+0x12/0x20 [dm_cache]\n[ 2245.508728]  smq_destroy+0x15/0x60 [dm_cache_smq]\n[ 2245.513435]  dm_cache_policy_destroy+0x12/0x20 [dm_cache]\n[ 2245.518834]  destroy+0xc0/0x110 [dm_cache]\n[ 2245.522933]  dm_table_destroy+0x5c/0x120 [dm_mod]\n[ 2245.527649]  __dm_destroy+0x10e/0x1c0 [dm_mod]\n[ 2245.532102]  dev_remove+0x117/0x190 [dm_mod]\n[ 2245.536384]  ctl_ioctl+0x1a2/0x290 [dm_mod]\n[ 2245.540579]  dm_ctl_ioctl+0xa/0x20 [dm_mod]\n[ 2245.544773]  __x64_sys_ioctl+0x8a/0xc0\n[ 2245.548524]  do_syscall_64+0x5c/0x90\n[ 2245.552104]  ? syscall_exit_to_user_mode+0x12/0x30\n[ 2245.556897]  ? do_syscall_64+0x69/0x90\n[ 2245.560648]  ? do_syscall_64+0x69/0x90\n[ 2245.564394]  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n[ 2245.569447] RIP: 0033:0x7fe52583ec6b\n...\n[ 2245.646771] ------------[ cut here ]------------\n[ 2245.651395] kmem_cache_destroy bt_work: Slab cache still has objects when called from btracker_destroy+0x12/0x20 [dm_cache]\n[ 2245.651408] WARNING: CPU: 7 PID: 10805 at mm/slab_common.c:478 kmem_cache_destroy+0x128/0x130\n\nFound using: lvm2-testsuite --only \"cache-single-split.sh\"\n\nBen bisected and found that commit 0495e337b703 (\"mm/slab_common:\nDeleting kobject in kmem_cache_destroy() without holding\nslab_mutex/cpu_hotplug_lock\") first exposed dm-cache's incomplete\ncleanup of its background tracker work objects."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-cache-background-tracker.c"],"versions":[{"version":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","lessThan":"673a3af21d5e3ed769f3eaed0c888244290a3506","status":"affected","versionType":"git"},{"version":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","lessThan":"ed56ad5cacb7a3aeb611494d5d66e2399d2bfecc","status":"affected","versionType":"git"},{"version":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","lessThan":"95ab80a8a0fef2ce0cc494a306dd283948066ce7","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-cache-background-tracker.c"],"versions":[{"version":"4.12","status":"affected"},{"version":"0","lessThan":"4.12","status":"unaffected","versionType":"semver"},{"version":"6.1.16","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2.3","lessThanOrEqual":"6.2.*","status":"unaffected","versionType":"semver"},{"version":"6.3","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":"4.12","versionEndExcluding":"6.1.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.2.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/673a3af21d5e3ed769f3eaed0c888244290a3506"},{"url":"https://git.kernel.org/stable/c/ed56ad5cacb7a3aeb611494d5d66e2399d2bfecc"},{"url":"https://git.kernel.org/stable/c/95ab80a8a0fef2ce0cc494a306dd283948066ce7"}],"title":"dm cache: free background tracker's queued work in btracker_destroy","x_generator":{"engine":"bippy-1.2.0"}}}}