vulnerability
Red Hat: CVE-2025-40158: kernel: ipv6: use RCU in ip6_output() (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:M/Au:S/C:C/I:C/A:C) | Nov 12, 2025 | Feb 3, 2026 | Feb 3, 2026 |
Severity
7
CVSS
(AV:L/AC:M/Au:S/C:C/I:C/A:C)
Published
Nov 12, 2025
Added
Feb 3, 2026
Modified
Feb 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().
Solutions
redhat-upgrade-kernelredhat-upgrade-kernel-rt
References
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