CVEvulnerability
CVE-2025-40139
7.8 HIGH
Official page ↗
- Status
- Deferred
- Published
- 2025-11-12
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
References
- https://git.kernel.org/stable/c/0736993bfe5c7a9c744ae3fac62d769dfdae54e1 git.kernel.org
- https://git.kernel.org/stable/c/5a2fccc4b32c13ddde3676f9e15e1a9baa7d6fde git.kernel.org
- https://git.kernel.org/stable/c/80d1fd39f4e37d836655e9f7ffccaf78925049bf git.kernel.org
- https://git.kernel.org/stable/c/935d783e5de9b64587f3adb25641dd8385e64ddb git.kernel.org
- https://git.kernel.org/stable/c/956c57daba55cf9ed25d9f2512883b8a1a927599 git.kernel.org