CVE-2025-40168

Linux Kernel 4.11-6.17.3 - Use-After-Free in SMC Connection Prefix Matching

Title source: llm

Description

In the Linux kernel, the following vulnerability has been resolved: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match(). smc_clc_prfx_match() is called from smc_listen_work() and not under RCU nor RTNL. Using sk_dst_get(sk)->dev could trigger UAF. Let's use __sk_dst_get() and dst_dev_rcu(). Note that the returned value of smc_clc_prfx_match() is not used in the caller.

References (2)

Core 2

Core References

Patch

https://git.kernel.org/stable/c/d26e80f7fb62d77757b67a1b94e4ac756bc9c658

Patch

https://git.kernel.org/stable/c/235f81045c008169cc4e1955b4a64e118eebe61b

Scores

EPSS 0.0017

EPSS Percentile 6.6%

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

Status published

Products (7)

linux/Kernel 4.11.0 - 6.17.3linux

Linux/Linux < 4.11

Linux/Linux 4.11

Linux/Linux 6.17.3 - 6.17.*

Linux/Linux 6.18

Linux/Linux a046d57da19f812216f393e7c535f5858f793ac3 - 235f81045c008169cc4e1955b4a64e118eebe61b

Linux/Linux a046d57da19f812216f393e7c535f5858f793ac3 - d26e80f7fb62d77757b67a1b94e4ac756bc9c658

Published Nov 12, 2025

Tracked Since Feb 18, 2026