{"cve":"CVE-2023-53765","nvd":{"published":"2025-12-08T02:15:52.420","modified":"2026-06-17T06:46:01.870","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/673a3af21d5e3ed769f3eaed0c888244290a3506","https://git.kernel.org/stable/c/95ab80a8a0fef2ce0cc494a306dd283948066ce7","https://git.kernel.org/stable/c/ed56ad5cacb7a3aeb611494d5d66e2399d2bfecc"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:16:40.427100871+00:00"},"epss":{"cve":"CVE-2023-53765","score":0.00184,"percentile":0.07975,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}