{"id":"CVE-2025-21805","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rtrs: Add missing deinit() call\n\nA warning is triggered when repeatedly connecting and disconnecting the\nrnbd:\n list_add corruption","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rtrs: Add missing deinit() call\n\nA warning is triggered when repeatedly connecting and disconnecting the\nrnbd:\n list_add corruption. prev->next should be next (fff…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 6.12, < 6.12.13","linux_kernel >= 6.13, < 6.13.2"],"patched":["linux_kernel 6.13.2"],"published":"2025-02-27","updated":"2026-07-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-21805","references":[{"url":"https://git.kernel.org/stable/c/1af2c769032b6b334cd2a867d7d8c7cbbc527b2d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5a79cc9bc961fafe90787f86e8f53ba6fad8d63b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/81468c4058a62e84e475433b83b3edc613294f5e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00392,"epssPercentile":0.30486,"ingestedAt":"2026-07-30T06:53:10.088Z","slug":"CVE-2025-21805","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rtrs: Add missing deinit() call\n\nA warning is triggered when repeatedly connecting and disconnecting the\nrnbd:\n list_add corruption. prev->next should be next (ffff88800b13e480), but was ffff88801ecd1338. (prev=ffff88801ecd1340).\n WARNING: CPU: 1 PID: 36562 at lib/list_debug.c:32 __list_add_valid_or_report+0x7f/0xa0\n Workqueue: ib_cm cm_work_handler [ib_cm]\n RIP: 0010:__list_add_valid_or_report+0x7f/0xa0\n  ? __list_add_valid_or_report+0x7f/0xa0\n  ib_register_event_handler+0x65/0x93 [ib_core]\n  rtrs_srv_ib_dev_init+0x29/0x30 [rtrs_server]\n  rtrs_ib_dev_find_or_add+0x124/0x1d0 [rtrs_core]\n  __alloc_path+0x46c/0x680 [rtrs_server]\n  ? rtrs_rdma_connect+0xa6/0x2d0 [rtrs_server]\n  ? rcu_is_watching+0xd/0x40\n  ? __mutex_lock+0x312/0xcf0\n  ? get_or_create_srv+0xad/0x310 [rtrs_server]\n  ? rtrs_rdma_connect+0xa6/0x2d0 [rtrs_server]\n  rtrs_rdma_connect+0x23c/0x2d0 [rtrs_server]\n  ? __lock_release+0x1b1/0x2d0\n  cma_cm_event_handler+0x4a/0x1a0 [rdma_cm]\n  cma_ib_req_handler+0x3a0/0x7e0 [rdma_cm]\n  cm_process_work+0x28/0x1a0 [ib_cm]\n  ? _raw_spin_unlock_irq+0x2f/0x50\n  cm_req_handler+0x618/0xa60 [ib_cm]\n  cm_work_handler+0x71/0x520 [ib_cm]\n\nCommit 667db86bcbe8 (\"RDMA/rtrs: Register ib event handler\") introduced a\nnew element .deinit but never used it at all. Fix it by invoking the\n`deinit()` to appropriately unregister the IB event handler.\n\n## Affected\n\n- `linux_kernel >= 6.12, < 6.12.13`\n- `linux_kernel >= 6.13, < 6.13.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.13.2`","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}