VulnerabilityPublished 19 Aug 2025Updated 5 Nov 2026

CVE-2025-38587: Linux kernel · ipv6: fix possible infinite loop in fib6_info_uses_dev()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in f8d8ce1b515a0a6af72b30502670a406cfb75073 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 23:23 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

EPSS

0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch

Available – fixed in f8d8ce1b515a0a6af72b30502670a406cfb75073, e09be457b71b983a085312ff9e981f51e4ed3211, db65739d406c72776fbdbbc334be827ef05880d2 +7

Exploitation evidence

Disclosed: evidence found.
CVE published 19 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected >=6.1.128 <6.1.148 >=6.6.75 <6.6.102 >=6.12.2 <6.12.42 >=6.11.11 <6.12	Fixed in f8d8ce1b515a0a6af72b30502670a406cfb75073 e09be457b71b983a085312ff9e981f51e4ed3211 db65739d406c72776fbdbbc334be827ef05880d2 bc85e62394f008fa848c4ba02c936c735a3e8ef5 16d21816c0918f8058b5fc14cbe8595d62046e2d 9cb6de8ee144a94ae7a40bdb32560329ab7276f0 6.12.42 6.12 6.6.102 6.1.148
LinuxLinux	Affected =6.13	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible infinite loop in fib6_info_uses_dev() fib6_info_uses_dev() seems to rely on RCU without an explicit protection. Like the prior fix in rt6_nlmsg_size(), we need to make sure fib6_del_route() or fib6_add_rt2node() have not removed the anchor from the list, or we risk an infinite loop.

References

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