CVE-2026-98098: Linux kernel · tipc: fix NULL deref in tipc_named_node_up() on empty publication list
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in d0d82f1214f321143c5dbc2e48e4a4e6c4226895 : patch Linux kernel soon.
Data as of 26 Oct 2026, 14:05 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in d0d82f1214f321143c5dbc2e48e4a4e6c4226895, b5344e459996afb45e30fdc407b41e6674793b21, b3b76e9f4f2476f1135b2ba7743a821db4a0df4b +4
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Sep 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 to a fixed release listed under Affected software.
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
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
A fix is available and has been applied in the Linux kernel commits listed under fixedVersions. Users should update their Linux kernel to a version including these fixes to prevent the NULL pointer dereference and ensure reliable TIPC notifications. No additional mitigation is required beyond applying the official patch.
Description
A vulnerability in the Linux kernel's TIPC subsystem allows a NULL pointer dereference in the function tipc_named_node_up() when the publication list is empty. This occurs if user-space applications bind more than 65535 local-scope service addresses, causing protocol service types to not be inserted into the name table. This results in subscribers not receiving node or link state notifications and triggers a kernel NULL pointer dereference crash. The issue is fixed by ensuring protocol service types are always inserted and reducing the maximum number of local publications by one.
References
- git.kernel.org/stable/c/246a4b4aace490664927042e93400a6f940d197f (opens in a new tab)
- git.kernel.org/stable/c/6188cf0c989dea60f2efe800eaebb7d0bd16e2b2 (opens in a new tab)
- git.kernel.org/stable/c/b5344e459996afb45e30fdc407b41e6674793b21 (opens in a new tab)
- git.kernel.org/stable/c/68619f965329d2f7b113a3d5811aa23198f39105 (opens in a new tab)
- git.kernel.org/stable/c/ad805326d874062f8bc72a94884f86046148cde3 (opens in a new tab)
- git.kernel.org/stable/c/d0d82f1214f321143c5dbc2e48e4a4e6c4226895 (opens in a new tab)
- git.kernel.org/stable/c/b3b76e9f4f2476f1135b2ba7743a821db4a0df4b (opens in a new tab)