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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2025-38588

ipv6: prevent infinite loop in rt6_nlmsg_size()CVE-2025-38588

Answer in brief

CVE-2025-38588 records a Unknown severity vulnerability in ipv6: prevent infinite loop in rt6_nlmsg_size(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 19, 2025Updated Nov 5, 2026Source checked Nov 5, 2026First seen by HOL Nov 5, 2026Material review Nov 5, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Nov 5, 2026
References
7 linked sources
Open source record

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2 <6d345136c9b875f065d226908a29c25cdf9343f8 || >=52da02521ede55fb86546c3fffd9377b3261b91f <e1b7932af47f92432be8303d2439d1bf77b0be23 || >=34a949e7a0869dfa31a40416d2a56973fae1807b <cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38 || >=d9ccb18f83ea2bb654289b6ecf014fd267cc988b <3c13db3e47e170bab19e574404e7b6be45ea873d || >=d9ccb18f83ea2bb654289b6ecf014fd267cc988b <46aeb66e9e54ed0d56c18615e1c3dbd502b327ab || >=d9ccb18f83ea2bb654289b6ecf014fd267cc988b <54e6fe9dd3b0e7c481c2228782c9494d653546da || 11edcd026012ac18acee0f1514db3ed1b160fc6f || >=6.1.128 <6.1.148 || >=6.6.75 <6.6.102 || >=6.12.2 <6.12.42 || >=6.11.11 <6.126d345136c9b875f065d226908a29c25cdf9343f8, e1b7932af47f92432be8303d2439d1bf77b0be23, cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38, 3c13db3e47e170bab19e574404e7b6be45ea873d, 46aeb66e9e54ed0d56c18615e1c3dbd502b327ab, 54e6fe9dd3b0e7c481c2228782c9494d653546da, 6.1.148, 6.6.102, 6.12.42, 6.12
Linux/Linuxgeneric6.13Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 6d345136c9b875f065d226908a29c25cdf9343f8 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 19, 2025

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 5, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencelists.debian.org
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.