{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-37772","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T04:51:23.939Z","datePublished":"2025-05-01T13:07:12.168Z","dateUpdated":"2026-05-11T21:14:51.155Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:14:51.155Z"},"descriptions":[{"lang":"en","value":"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 *)<absent>\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":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/core/cma.c"],"versions":[{"version":"925d046e7e52c71c3531199ce137e141807ef740","lessThan":"51003b2c872c63d28bcf5fbcc52cf7b05615f7b7","status":"affected","versionType":"git"},{"version":"925d046e7e52c71c3531199ce137e141807ef740","lessThan":"c2b169fc7a12665d8a675c1ff14bca1b9c63fb9a","status":"affected","versionType":"git"},{"version":"925d046e7e52c71c3531199ce137e141807ef740","lessThan":"d23fd7a539ac078df119707110686a5b226ee3bb","status":"affected","versionType":"git"},{"version":"925d046e7e52c71c3531199ce137e141807ef740","lessThan":"b172a4a0de254f1fcce7591833a9a63547c2f447","status":"affected","versionType":"git"},{"version":"925d046e7e52c71c3531199ce137e141807ef740","lessThan":"45f5dcdd049719fb999393b30679605f16ebce14","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/infiniband/core/cma.c"],"versions":[{"version":"6.0","status":"affected"},{"version":"0","lessThan":"6.0","status":"unaffected","versionType":"semver"},{"version":"6.1.135","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.88","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.25","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.14.4","lessThanOrEqual":"6.14.*","status":"unaffected","versionType":"semver"},{"version":"6.15","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":"6.0","versionEndExcluding":"6.1.135"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.6.88"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.12.25"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.14.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.15"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/51003b2c872c63d28bcf5fbcc52cf7b05615f7b7"},{"url":"https://git.kernel.org/stable/c/c2b169fc7a12665d8a675c1ff14bca1b9c63fb9a"},{"url":"https://git.kernel.org/stable/c/d23fd7a539ac078df119707110686a5b226ee3bb"},{"url":"https://git.kernel.org/stable/c/b172a4a0de254f1fcce7591833a9a63547c2f447"},{"url":"https://git.kernel.org/stable/c/45f5dcdd049719fb999393b30679605f16ebce14"}],"title":"RDMA/cma: Fix workqueue crash in cma_netevent_work_handler","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T19:54:49.961Z"}}]}}