CVE-2025-38588
What it is
In the Linux kernel, the following vulnerability has been resolved: ipv6: prevent infinite loop in rt6_nlmsg_size() While testing prior patch, I was able to trigger an infinite loop in rt6_nlmsg_size() in the following place: list_for_each_entry_rcu(sibling, &f6i->fib6_siblings, fib6_siblings) { rt6_nh_nlmsg_size(sibling->fib6_nh, &nexthop_len); } This is because fib6_del_route() and fib6_add_rt2node() uses list_del_rcu(), which can confuse rcu readers, because they might no longer see the head of the list. Restart the loop if f6i->fib6_nsiblings is zero.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of service disruption.
- Exploit odds
- 0.2% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.2% in the next 30 days (EPSS).
- Severity: 5.5 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.2% · EPSS, next 30 days
- Weakness
- CWE-835
- Record status
- Analyzed
Affected
- Linux Kernel < 6.1.148
- Linux Kernel < 6.6.102
- Linux Kernel < 6.12
- Linux Kernel < 6.12.42
- Linux Kernel < 6.15.10
- Linux Kernel < 6.16.1
- Debian Linux 11.0
Attack profile CVSS 3.1 · 5.5
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2025-38588.md and follow it. Check whether this project is affected by CVE-2025-38588. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/3c13db3e47e170bab19e574404e7b6be45ea873d
- https://git.kernel.org/stable/c/46aeb66e9e54ed0d56c18615e1c3dbd502b327ab
- https://git.kernel.org/stable/c/54e6fe9dd3b0e7c481c2228782c9494d653546da
- https://git.kernel.org/stable/c/6d345136c9b875f065d226908a29c25cdf9343f8
- https://git.kernel.org/stable/c/cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38
- https://git.kernel.org/stable/c/e1b7932af47f92432be8303d2439d1bf77b0be23
References
- https://git.kernel.org/stable/c/3c13db3e47e170bab19e574404e7b6be45ea873d
- https://git.kernel.org/stable/c/46aeb66e9e54ed0d56c18615e1c3dbd502b327ab
- https://git.kernel.org/stable/c/54e6fe9dd3b0e7c481c2228782c9494d653546da
- https://git.kernel.org/stable/c/6d345136c9b875f065d226908a29c25cdf9343f8
- https://git.kernel.org/stable/c/cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38
- https://git.kernel.org/stable/c/e1b7932af47f92432be8303d2439d1bf77b0be23
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html