{"id":"CVE-2023-53629","revision":null,"records":[{"revision":"bf2f55a1bdbb49cbb2a50c3c2b5826cb","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-53629","aliases":[],"title":"fs: dlm: fix use after free in midcomms commit","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs: dlm: fix use after free in midcomms commit\n\nWhile working on processing dlm message in softirq context I experienced\nthe following KASAN use-after-free warning:\n\n[ 151.760477] ==================================================================\n[ 151.761803] BUG: KASAN: use-after-free in dlm_midcomms_commit_mhandle+0x19d/0x4b0\n[ 151.763414] Read of size 4 at addr ffff88811a980c60 by task lock_torture/1347\n\n[ 151.765284] CPU: 7 PID: 1347 Comm: lock_torture Not tainted 6.1.0-rc4+ #2828\n[ 151.766778] Hardware name: Red Hat KVM/RHEL-AV, BIOS 1.16.0-3.module+el8.7.0+16134+e5908aa2 04/01/2014\n[ 151.768726] Call Trace:\n[ 151.769277] \n[ 151.769748] dump_stack_lvl+0x5b/0x86\n[ 151.770556] print_report+0x180/0x4c8\n[ 151.771378] ? kasan_complete_mode_report_info+0x7c/0x1e0\n[ 151.772241] ? dlm_midcomms_commit_mhandle+0x19d/0x4b0\n[ 151.773069] kasan_report+0x93/0x1a0\n[ 151.773668] ? dlm_midcomms_commit_mhandle+0x19d/0x4b0\n[ 151.774514] __asan_load4+0x7e/0xa0\n[ 151.775089] dlm_midcomms_commit_mhandle+0x19d/0x4b0\n[ 151.775890] ? create_message.isra.29.constprop.64+0x57/0xc0\n[ 151.776770] send_common+0x19f/0x1b0\n[ 151.777342] ? remove_from_waiters+0x60/0x60\n[ 151.778017] ? lock_downgrade+0x410/0x410\n[ 151.778648] ? __this_cpu_preempt_check+0x13/0x20\n[ 151.779421] ? rcu_lockdep_current_cpu_online+0x88/0xc0\n[ 151.780292] _convert_lock+0x46/0x150\n[ 151.780893] convert_lock+0x7b/0xc0\n[ 151.781459] dlm_lock+0x3ac/0x580\n[ 151.781993] ? 0xffffffffc0540000\n[ 151.782522] ? torture_stop+0x120/0x120 [dlm_locktorture]\n[ 151.783379] ? dlm_scan_rsbs+0xa70/0xa70\n[ 151.784003] ? preempt_count_sub+0xd6/0x130\n[ 151.784661] ? is_module_address+0x47/0x70\n[ 151.785309] ? torture_stop+0x120/0x120 [dlm_locktorture]\n[ 151.786166] ? 0xffffffffc0540000\n[ 151.786693] ? lockdep_init_map_type+0xc3/0x360\n[ 151.787414] ? 0xffffffffc0540000\n[ 151.787947] torture_dlm_lock_sync.isra.3+0xe9/0x150 [dlm_locktorture]\n[ 151.789004] ? torture_stop+0x120/0x120 [dlm_locktorture]\n[ 151.789858] ? 0xffffffffc0540000\n[ 151.790392] ? lock_torture_cleanup+0x20/0x20 [dlm_locktorture]\n[ 151.791347] ? delay_tsc+0x94/0xc0\n[ 151.791898] torture_ex_iter+0xc3/0xea [dlm_locktorture]\n[ 151.792735] ? torture_start+0x30/0x30 [dlm_locktorture]\n[ 151.793606] lock_torture+0x177/0x270 [dlm_locktorture]\n[ 151.794448] ? torture_dlm_lock_sync.isra.3+0x150/0x150 [dlm_locktorture]\n[ 151.795539] ? lock_torture_stats+0x80/0x80 [dlm_locktorture]\n[ 151.796476] ? do_raw_spin_lock+0x11e/0x1e0\n[ 151.797152] ? mark_held_locks+0x34/0xb0\n[ 151.797784] ? _raw_spin_unlock_irqrestore+0x30/0x70\n[ 151.798581] ? __kthread_parkme+0x79/0x110\n[ 151.799246] ? trace_preempt_on+0x2a/0xf0\n[ 151.799902] ? __kthread_parkme+0x79/0x110\n[ 151.800579] ? preempt_count_sub+0xd6/0x130\n[ 151.801271] ? __kasan_check_read+0x11/0x20\n[ 151.801963] ? __kthread_parkme+0xec/0x110\n[ 151.802630] ? lock_torture_stats+0x80/0x80 [dlm_locktorture]\n[ 151.803569] kthread+0x192/0x1d0\n[ 151.804104] ? kthread_complete_and_exit+0x30/0x30\n[ 151.804881] ret_from_fork+0x1f/0x30\n[ 151.805480] \n\n[ 151.806111] Allocated by task 1347:\n[ 151.806681] kasan_save_stack+0x26/0x50\n[ 151.807308] kasan_set_track+0x25/0x30\n[ 151.807920] kasan_save_alloc_info+0x1e/0x30\n[ 151.808609] __kasan_slab_alloc+0x63/0x80\n[ 151.809263] kmem_cache_alloc+0x1ad/0x830\n[ 151.809916] dlm_allocate_mhandle+0x17/0x20\n[ 151.810590] dlm_midcomms_get_mhandle+0x96/0x260\n[ 151.811344] _create_message+0x95/0x180\n[ 151.811994] create_message.isra.29.constprop.64+0x57/0xc0\n[ 151.812880] send_common+0x129/0x1b0\n[ 151.813467] _convert_lock+0x46/0x150\n[ 151.814074] convert_lock+0x7b/0xc0\n[ 151.814648] dlm_lock+0x3ac/0x580\n[ 151.815199] torture_dlm_lock_sync.isra.3+0xe9/0x150 [dlm_locktorture]\n[ 151.816258] torture_ex_iter+0xc3/0xea [dlm_locktorture]\n[ 151.817129] lock_t\n---truncated---","state":0,"publishedAt":"2025-10-07T15:19:32.96+00:00","modifiedAt":"2026-10-15T21:41:32.249+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 \"fs/dlm/midcomms.c\"\n ],\n \"versions\": [\n {\n \"version\": \"489d8e559c6596eb08e16447d9830bc39afbe54e\",\n \"lessThan\": \"84d6ce2aef1d06a53f606211da68a2085dfeb50d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"489d8e559c6596eb08e16447d9830bc39afbe54e\",\n \"lessThan\": \"a3b0e9ac3c2447008db942d51f593841d8329e99\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"489d8e559c6596eb08e16447d9830bc39afbe54e\",\n \"lessThan\": \"a2de9f9b686c71b4fa3663ae374f5f643c46a446\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"489d8e559c6596eb08e16447d9830bc39afbe54e\",\n \"lessThan\": \"724b6bab0d75f1dc01fdfbf7fe8d4217a5cb90ba\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\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 \"fs/dlm/midcomms.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.14\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.14\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.209\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.20\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.2.3\",\n \"lessThanOrEqual\": \"6.2.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.3\",\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/84d6ce2aef1d06a53f606211da68a2085dfeb50d","https://git.kernel.org/stable/c/a3b0e9ac3c2447008db942d51f593841d8329e99","https://git.kernel.org/stable/c/a2de9f9b686c71b4fa3663ae374f5f643c46a446","https://git.kernel.org/stable/c/724b6bab0d75f1dc01fdfbf7fe8d4217a5cb90ba"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53629","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-53629","identifiers":["CVE-2023-53629"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-09T13:04:36.1502744+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T13:04:36.1502744+00:00","lastSuccessAt":"2026-11-09T13:04:36.3096956+00:00","error":null,"lastVerifiedAt":"2026-11-09T13:04:36.3096959+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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