CVE-2025-40158
Published: November 14, 2025Last modified: November 3, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: use RCU in ip6_output() Use RCU in ip6_output() in order to use dst_dev_rcu() to prevent possible UAF. We can remove rcu_read_lock()/rcu_read_unlock() pairs from ip6_finish_output2().
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 | Fixed (6.1.191-r0) |
| 25 LTS | linux-lts | Fixed (6.12.115-r0) | |
| Stream | linux-lts | Fixed (6.18.35-r1) |
References
- https://git.kernel.org/stable/c/0393f85c3241c19ba8550f04a812e7d19f6b3082
- https://git.kernel.org/stable/c/11709573cc4e48dc34c80fc7ab9ce5b159e29695
- https://git.kernel.org/stable/c/423895685f367b5a0a956bd14b02df0192bded4c
- https://git.kernel.org/stable/c/4549ce1057363c8dc072f40c6aa591c279eafed2
- https://git.kernel.org/stable/c/92803b826e40e49a5e8a6e208f4b4574e9d19426