CVE-2025-40139 (GCVE-0-2025-40139)
Vulnerability from cvelistv5
Published
2025-11-12 10:23
Modified
2026-10-15 22:02
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: a046d57da19f812216f393e7c535f5858f793ac3
Version: a046d57da19f812216f393e7c535f5858f793ac3
Version: a046d57da19f812216f393e7c535f5858f793ac3
Version: a046d57da19f812216f393e7c535f5858f793ac3
Version: a046d57da19f812216f393e7c535f5858f793ac3
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