CVE-2025-37772: Linux kernel · RDMA/cma: Fix workqueue crash in cma_netevent_work_handler
Source GCVE Database
Not known to be exploited · CVSS 5.5 Medium.
Data as of 4 Nov 2026, 18:12 UTC
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 1 May 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 4 Nov 2026.
What to do
AI-suggested
A fix is available that moves the initialization of the work_struct to an earlier point in the code to prevent race conditions and crashes. Users should apply the official Linux kernel patches that address this issue once released. Until patched, avoid rapid successive calls to cma_netevent_callback() if possible.
Description
CVE-2025-37772 is a vulnerability in the Linux kernel's RDMA/cma subsystem where a workqueue crash occurs due to improper handling of work items in cma_netevent_work_handler. The issue arises when multiple calls to cma_netevent_callback() happen in quick succession, causing the reuse and overwriting of the same work_struct, leading to a NULL pointer dereference and kernel crash. The flaw is fixed by initializing the work item earlier to avoid race conditions.
References
- nvd.nist.gov/vuln/detail/CVE-2025-37772 (opens in a new tab)
- git.kernel.org/stable/c/45f5dcdd049719fb999393b30679605f16ebce14 (opens in a new tab)
- git.kernel.org/stable/c/51003b2c872c63d28bcf5fbcc52cf7b05615f7b7 (opens in a new tab)
- git.kernel.org/stable/c/b172a4a0de254f1fcce7591833a9a63547c2f447 (opens in a new tab)
- git.kernel.org/stable/c/c2b169fc7a12665d8a675c1ff14bca1b9c63fb9a (opens in a new tab)
- git.kernel.org/stable/c/d23fd7a539ac078df119707110686a5b226ee3bb (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/05/msg00045.html (opens in a new tab)