CVE-2025-40139
smc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set().
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Nov 12, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
a046d57da19f812216f393e7c535f5858f793ac3 < 0736993bfe5c7a9c744ae3fac62d769dfdae54e1 a046d57da19f812216f393e7c535f5858f793ac3 < 935d783e5de9b64587f3adb25641dd8385e64ddb
Linux / Linux
4.11