CVE-2026-98598: Linux kernel · ipv6: Prevent rt6_insert_exception() for dying fib6_info.
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in e03e77071e75ce726d877f0a4349a28b6e1f487a : update Linux kernel when convenient.
Data as of 26 Oct 2026, 13:47 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in e03e77071e75ce726d877f0a4349a28b6e1f487a, 649ffc76ed5483b2caf35ed90d3787538efc4e53, 0346ec2f080b40d95ed05b853bb9226289e75212
Exploitation evidence
Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.
What to do
Upgrade Linux kernel to e03e77071e75ce726d877f0a4349a28b6e1f487a, 649ffc76ed5483b2caf35ed90d3787538efc4e53 or 0346ec2f080b40d95ed05b853bb9226289e75212.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available and has been applied in the Linux kernel source (commits e03e77071e75ce726d877f0a4349a28b6e1f487a, 649ffc76ed5483b2caf35ed90d3787538efc4e53, and 0346ec2f080b40d95ed05b853bb9226289e75212). Users should update to a kernel version including these commits to remediate the issue.
Description
A vulnerability in the Linux kernel IPv6 implementation allows a reference cycle and resource leak during route exception insertion for dying fib6_info structures. This can stall network device unregistration due to leaked fib6_info, nexthop devices, and per-CPU routes.