CVE-2025-40168
Published: November 14, 2025Last modified: June 24, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match(). smc_clc_prfx_match() is called from smc_listen_work() and not under RCU nor RTNL. Using sk_dst_get(sk)->dev could trigger UAF. Let's use __sk_dst_get() and dst_dev_rcu(). Note that the returned value of smc_clc_prfx_match() is not used in the caller.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.1 |
| Attack Vector | NETWORK |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Vulnerable (6.1.158-r0) |
| 25 LTS | linux-lts | Vulnerable (6.12.57-r0) | |
| Stream | linux-lts | Fixed (6.18.35-r1) |
References
- https://git.kernel.org/stable/c/235f81045c008169cc4e1955b4a64e118eebe61b
- https://git.kernel.org/stable/c/326e5cf301d0bec0a672aa834d8254c4f9df6255
- https://git.kernel.org/stable/c/3f119c37aa293af41400cccb3d89fab8dcf774b0
- https://git.kernel.org/stable/c/4f5f52a5842937f945582a93cb9daed9ea526fee
- https://git.kernel.org/stable/c/d26e80f7fb62d77757b67a1b94e4ac756bc9c658