CVE-2024-57791: net/smc: check return value of sock_recvmsg when draining clc data

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-01-11 · updated 2026-10-15

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.

Affected products

Linux kernel: from 5.8.1 before 5.10.233; from 5.11 before 5.15.176; from 5.16 before 6.1.122; from 6.2 before 6.6.68; from 6.7 before 6.12.7; 5.8, 5.8-rc5, 5.8-rc6, 5.8-rc7, 6.13-rc1, 6.13-rc2 (+1) — fixed in 5.10.233, 5.15.176, 6.1.122, 6.12.7, 6.6.68

How to fix

Upgrade to a fixed version: Linux kernel 5.10.233, 5.15.176, 6.1.122, 6.12.7. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2024-57791 or the next vulnerability affects your stack