CVE-2026-98151: Linux kernel · bpf: Fix REG INVARIANTS VIOLATION on speculative pointer arithmetic
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 12:55 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
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
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available that corrects the order of register state updates during BPF verification to maintain consistency in speculative paths. Users should apply the official Linux kernel updates that include this fix. Since this is a kernel-level fix, upgrading to patched kernel versions is the recommended remediation.
Description
A vulnerability in the Linux kernel's BPF verifier involving speculative pointer arithmetic has been fixed. The issue caused a verifier warning due to inconsistent register state snapshots during speculative execution paths. This inconsistency could lead to a REG INVARIANTS VIOLATION warning triggered by the verifier. The fix involves adjusting the order of operations to maintain consistent register state during speculative path verification.
References
- ubuntu.com/security/CVE-2026-98151 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98151 (opens in a new tab)
- git.kernel.org/stable/c/d623a4a58bb238443505d5c2949d1182dcfc26b6 (opens in a new tab)
- git.kernel.org/stable/c/150aeba624e8b7cac51c39440d7e8e1fd11de9a0 (opens in a new tab)
- git.kernel.org/stable/c/21a681526c715aebb4f918b8c131583442d1b3d8 (opens in a new tab)
- git.kernel.org/stable/c/9f9477ae73de9c5a28e8ab7000d8097b078faee4 (opens in a new tab)