CVE-2026-98151: Linux kernel · bpf: Fix REG INVARIANTS VIOLATION on speculative pointer arithmetic
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in d623a4a58bb238443505d5c2949d1182dcfc26b6 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 13:47 UTC
Rated Low by Threat Radar's AI analysis · 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.
- Patch
- Available – fixed in d623a4a58bb238443505d5c2949d1182dcfc26b6, 150aeba624e8b7cac51c39440d7e8e1fd11de9a0, 21a681526c715aebb4f918b8c131583442d1b3d8 +1
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 Linux kernel to d623a4a58bb238443505d5c2949d1182dcfc26b6, 150aeba624e8b7cac51c39440d7e8e1fd11de9a0, 21a681526c715aebb4f918b8c131583442d1b3d8 or 9f9477ae73de9c5a28e8ab7000d8097b078faee4.
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– |
AI-suggested
A fix is available in the Linux kernel as indicated by the fixed commit versions. Users and administrators should update to a Linux kernel version that includes the fix identified by the commits d623a4a58bb238443505d5c2949d1182dcfc26b6, 150aeba624e8b7cac51c39440d7e8e1fd11de9a0, 21a681526c715aebb4f918b8c131583442d1b3d8, or 9f9477ae73de9c5a28e8ab7000d8097b078faee4. No additional mitigation steps are indicated.
Description
CVE-2026-98151 is a vulnerability in the Linux kernel's BPF verifier related to a REG INVARIANTS VIOLATION triggered by speculative pointer arithmetic. The issue arises from inconsistent tracking of 32-bit subregister bounds during speculative execution paths, causing verifier warnings and potential instability. The flaw is fixed by adjusting the order of operations to maintain consistent register state snapshots during verification.
References
- git.kernel.org/stable/c/21a681526c715aebb4f918b8c131583442d1b3d8 (opens in a new tab)
- git.kernel.org/stable/c/d623a4a58bb238443505d5c2949d1182dcfc26b6 (opens in a new tab)
- git.kernel.org/stable/c/9f9477ae73de9c5a28e8ab7000d8097b078faee4 (opens in a new tab)
- git.kernel.org/stable/c/150aeba624e8b7cac51c39440d7e8e1fd11de9a0 (opens in a new tab)