CVE-2026-63969: Linux kernel · ipv6: fix possible infinite loop in rt6_fill_node()
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 12 Nov 2026, 15:35 UTC
Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 19 Jul 2026
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 12 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Linux Linux | Affected
| Fixed in– |
AI-suggested
A fix for this vulnerability has been applied in the Linux kernel versions listed. Users should update to the fixed versions (=6.1.128, =6.6.75, =6.11.11, =6.12.2) to remediate this issue. No additional mitigation steps are indicated.
Description
A vulnerability in the Linux kernel's IPv6 implementation could cause a possible infinite loop in the rt6_fill_node() function, leading to CPU stalls. This issue arises from improper handling of linked list pointers under certain locking conditions. The flaw has been fixed by applying a patch that ensures reliable detachment signals during route deletion.
References
- git.kernel.org/stable/c/b014a63d2f2c2c767762b548381882dfb1655529 (opens in a new tab)
- git.kernel.org/stable/c/279853aec9f58d5cd723e6e5617c1c3337b30383 (opens in a new tab)
- git.kernel.org/stable/c/c65b1f60237daac7c56c2652e064cc566a45dc81 (opens in a new tab)
- git.kernel.org/stable/c/dc36a04621dcc2447dae428709207810b6c06e14 (opens in a new tab)
- git.kernel.org/stable/c/5e40de719ee76b8d96e2556ce36dbd3bd07bf37d (opens in a new tab)
- git.kernel.org/stable/c/9f72412bcf60144f252b0d6205106abf14344abc (opens in a new tab)