{
    "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"
            }
        }
    }
}