{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-37772", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-37772", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-05-01T13:07:12.168Z", "updatedAt": "2026-05-11T21:14:51.155Z", "importedAt": "2026-10-24T01:57:34.152Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "RDMA/cma: Fix workqueue crash in cma_netevent_work_handler", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cma: Fix workqueue crash in cma_netevent_work_handler\n\nstruct rdma_cm_id has member \"struct work_struct net_work\"\nthat is reused for enqueuing cma_netevent_work_handler()s\nonto cma_wq.\n\nBelow crash[1] can occur if more than one call to\ncma_netevent_callback() occurs in quick succession,\nwhich further enqueues cma_netevent_work_handler()s for the\nsame rdma_cm_id, overwriting any previously queued work-item(s)\nthat was just scheduled to run i.e. there is no guarantee\nthe queued work item may run between two successive calls\nto cma_netevent_callback() and the 2nd INIT_WORK would overwrite\nthe 1st work item (for the same rdma_cm_id), despite grabbing\nid_table_lock during enqueue.\n\nAlso drgn analysis [2] indicates the work item was likely overwritten.\n\nFix this by moving the INIT_WORK() to __rdma_create_id(),\nso that it doesn't race with any existing queue_work() or\nits worker thread.\n\n[1] Trimmed crash stack:\n=============================================\nBUG: kernel NULL pointer dereference, address: 0000000000000008\nkworker/u256:6 ... 6.12.0-0...\nWorkqueue: cma_netevent_work_handler [rdma_cm] (rdma_cm)\nRIP: 0010:process_one_work+0xba/0x31a\nCall Trace:\n worker_thread+0x266/0x3a0\n kthread+0xcf/0x100\n ret_from_fork+0x31/0x50\n ret_from_fork_asm+0x1a/0x30\n=============================================\n\n[2] drgn crash analysis:\n\n>>> trace = prog.crashed_thread().stack_trace()\n>>> trace\n(0) crash_setup_regs (./arch/x86/include/asm/kexec.h:111:15)\n(1) __crash_kexec (kernel/crash_core.c:122:4)\n(2) panic (kernel/panic.c:399:3)\n(3) oops_end (arch/x86/kernel/dumpstack.c:382:3)\n...\n(8) process_one_work (kernel/workqueue.c:3168:2)\n(9) process_scheduled_works (kernel/workqueue.c:3310:3)\n(10) worker_thread (kernel/workqueue.c:3391:4)\n(11) kthread (kernel/kthread.c:389:9)\n\nLine workqueue.c:3168 for this kernel version is in process_one_work():\n3168\tstrscpy(worker->desc, pwq->wq->name, WORKER_DESC_LEN);\n\n>>> trace[8][\"work\"]\n*(struct work_struct *)0xffff92577d0a21d8 = {\n\t.data = (atomic_long_t){\n\t\t.counter = (s64)536870912, <=== Note\n\t},\n\t.entry = (struct list_head){\n\t\t.next = (struct list_head *)0xffff924d075924c0,\n\t\t.prev = (struct list_head *)0xffff924d075924c0,\n\t},\n\t.func = (work_func_t)cma_netevent_work_handler+0x0 = 0xffffffffc2cec280,\n}\n\nSuspicion is that pwq is NULL:\n>>> trace[8][\"pwq\"]\n(struct pool_workqueue *)\n\nIn process_one_work(), pwq is assigned from:\nstruct pool_workqueue *pwq = get_work_pwq(work);\n\nand get_work_pwq() is:\nstatic struct pool_workqueue *get_work_pwq(struct work_struct *work)\n{\n \tunsigned long data = atomic_long_read(&work->data);\n\n \tif (data & WORK_STRUCT_PWQ)\n \t\treturn work_struct_pwq(data);\n \telse\n \t\treturn NULL;\n}\n\nWORK_STRUCT_PWQ is 0x4:\n>>> print(repr(prog['WORK_STRUCT_PWQ']))\nObject(prog, 'enum work_flags', value=4)\n\nBut work->data is 536870912 which is 0x20000000.\nSo, get_work_pwq() returns NULL and we crash in process_one_work():\n3168\tstrscpy(worker->desc, pwq->wq->name, WORKER_DESC_LEN);\n=============================================", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "925d046e7e52c71c3531199ce137e141807ef740", "status": "affected", "versionType": "git", "lessThan": "51003b2c872c63d28bcf5fbcc52cf7b05615f7b7" }, { "version": "925d046e7e52c71c3531199ce137e141807ef740", "status": "affected", "versionType": "git", "lessThan": "c2b169fc7a12665d8a675c1ff14bca1b9c63fb9a" }, { "version": "925d046e7e52c71c3531199ce137e141807ef740", "status": "affected", "versionType": "git", "lessThan": "d23fd7a539ac078df119707110686a5b226ee3bb" }, { "version": "925d046e7e52c71c3531199ce137e141807ef740", "status": "affected", "versionType": "git", "lessThan": "b172a4a0de254f1fcce7591833a9a63547c2f447" }, { "version": "925d046e7e52c71c3531199ce137e141807ef740", "status": "affected", "versionType": "git", "lessThan": "45f5dcdd049719fb999393b30679605f16ebce14" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.0", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.0" }, { "version": "6.1.135", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.88", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.25", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.14.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.14.*" }, { "version": "6.15", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }