CVE-2025-40139

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0736993bfe5c7a9c744ae3fac62d769dfdae54e1
https://git.kernel.org/stable/c/5a2fccc4b32c13ddde3676f9e15e1a9baa7d6fde
https://git.kernel.org/stable/c/80d1fd39f4e37d836655e9f7ffccaf78925049bf
https://git.kernel.org/stable/c/935d783e5de9b64587f3adb25641dd8385e64ddb
https://git.kernel.org/stable/c/956c57daba55cf9ed25d9f2512883b8a1a927599

Configurations

No configuration.

History

No history.

Information

Published : 2025-11-12 11:15

Updated : 2026-09-02 13:16

NVD link : CVE-2025-40139

Mitre link : CVE-2025-40139

CVE.ORG link : CVE-2025-40139

JSON object : View

Products Affected

No product.

CWE

No CWE.

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