CVE-2025-38588ipv6: prevent infinite loop in rt6_nlmsg_size()
- 5.5MediumCVSS base score
- 0.18%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 4 months later
· 4 months later
Published
- 15 months later
· 15 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2 – < 6d345136c9b875f065d226908a29c25cdf9343f8
- affected 52da02521ede55fb86546c3fffd9377b3261b91f – < e1b7932af47f92432be8303d2439d1bf77b0be23
- affected 34a949e7a0869dfa31a40416d2a56973fae1807b – < cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38
- affected d9ccb18f83ea2bb654289b6ecf014fd267cc988b – < 3c13db3e47e170bab19e574404e7b6be45ea873d
- affected d9ccb18f83ea2bb654289b6ecf014fd267cc988b – < 46aeb66e9e54ed0d56c18615e1c3dbd502b327ab
- affected d9ccb18f83ea2bb654289b6ecf014fd267cc988b – < 54e6fe9dd3b0e7c481c2228782c9494d653546da
- affected 11edcd026012ac18acee0f1514db3ed1b160fc6f
- affected 6.1.128 – < 6.1.148
- affected 6.6.75 – < 6.6.102
- affected 6.12.2 – < 6.12.42
- affected 6.11.11 – < 6.12
- affected 6.13
- unaffected < 6.13
- unaffected 6.1.148 – ≤ 6.1.*
- unaffected 6.6.102 – ≤ 6.6.*
- unaffected 6.12.42 – ≤ 6.12.*
- unaffected 6.15.10 – ≤ 6.15.*
- unaffected 6.16.1 – ≤ 6.16.*
- unaffected 6.17 – ≤ *
References
References7
- https://git.kernel.org/stable/c/6d345136c9b875f065d226908a29c25cdf9343f8 (opens in a new tab)
- https://git.kernel.org/stable/c/e1b7932af47f92432be8303d2439d1bf77b0be23 (opens in a new tab)
- https://git.kernel.org/stable/c/cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38 (opens in a new tab)
- https://git.kernel.org/stable/c/3c13db3e47e170bab19e574404e7b6be45ea873d (opens in a new tab)
- https://git.kernel.org/stable/c/46aeb66e9e54ed0d56c18615e1c3dbd502b327ab (opens in a new tab)
- https://git.kernel.org/stable/c/54e6fe9dd3b0e7c481c2228782c9494d653546da (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-27917 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-38588)Record last updated .