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.

INFO

Published Date :

2025-11-12T10:23:24.216Z

Last Modified :

2025-12-01T06:18:47.147Z

Source :

Linux
AFFECTED PRODUCTS

The following products are affected by CVE-2025-40139 vulnerability.

Vendors Products
Linux
  • Linux Kernel
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-40139.

URL Resource
https://git.kernel.org/stable/c/0736993bfe5c7a9c744ae3fac62d769dfdae54e1 cve-icon cve-icon
https://git.kernel.org/stable/c/935d783e5de9b64587f3adb25641dd8385e64ddb cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025111255-CVE-2025-40139-a030@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-40139 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-40139 cve-icon
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