CVE-2025-38588

MEDIUM EPSS 4.3%
Published Aug 19, 202510mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Aug 19, 2025 10mo ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-835

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel*≥6.1.128  –  <6.1.148
linuxlinux_kernel*≥6.6.75  –  <6.6.102
linuxlinux_kernel*≥6.11.11  –  <6.12
linuxlinux_kernel*≥6.12.2  –  <6.12.42
linuxlinux_kernel*≥6.13  –  <6.15.10
linuxlinux_kernel*≥6.16  –  <6.16.1
debiandebian_linux11.0any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/3c13db3e47e170bab19e574404e7b6be45ea873d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/46aeb66e9e54ed0d56c18615e1c3dbd502b327ab
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/54e6fe9dd3b0e7c481c2228782c9494d653546da
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6d345136c9b875f065d226908a29c25cdf9343f8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e1b7932af47f92432be8303d2439d1bf77b0be23
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Third Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/3c13db3e47e170bab19e574404e7b6be45ea873d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/46aeb66e9e54ed0d56c18615e1c3dbd502b327ab
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/54e6fe9dd3b0e7c481c2228782c9494d653546da
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6d345136c9b875f065d226908a29c25cdf9343f8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e1b7932af47f92432be8303d2439d1bf77b0be23
    Patch