CVE-2025-40139 (GCVE-0-2025-40139)

Vulnerability from cvelistv5 – Published: 2025-11-12 10:23 – Updated: 2026-05-11 21:43
VLAI
Title
smc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set().
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a046d57da19f812216f393e7c535f5858f793ac3 , < 0736993bfe5c7a9c744ae3fac62d769dfdae54e1 (git)
Affected: a046d57da19f812216f393e7c535f5858f793ac3 , < 935d783e5de9b64587f3adb25641dd8385e64ddb (git)
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Linux Linux Affected: 4.11
Unaffected: 0 , < 4.11 (semver)
Unaffected: 6.17.3 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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    "dateReserved": "2025-04-16T07:20:57.171Z",
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