VYPR
← All advisories
Unrated severityNVD Advisory· Published Nov 12, 2025· Updated Apr 15, 2026

CVE-2025-40139

CVE-2025-40139

Description

In the Linux kernel, the following vulnerability has been resolved:

smc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set().

smc_clc_prfx_set() is called during connect() and not under RCU nor RTNL.

Using sk_dst_get(sk)->dev could trigger UAF.

Let's use __sk_dst_get() and dev_dst_rcu() under rcu_read_lock() after kernel_getsockname().

Note that the returned value of smc_clc_prfx_set() is not used in the caller.

While at it, we change the 1st arg of smc_clc_prfx_set[46]_rcu() not to touch dst there.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

200

Patches

Vulnerability mechanics

References

2

News mentions

0

No linked articles in our index yet.