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VulnerabilityPublished

CVE-2026-63969: Linux kernel · ipv6: fix possible infinite loop in rt6_fill_node()

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 12 Nov 2026, 15:35 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
Linux LinuxAffected
  • 6.1.128 – 6.12.2
4 affected builds
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

Community reviews

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