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CVE-2026-98626VulnerabilityPublished Updated

Microsoft · bpf: Restrict CO-RE poisoning to relocatable instructions

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-98626· High

Not known to be exploited · fixed in f2a24101e89dd0804e717da7c1bd6af513698aa2 : patch Microsoft soon.

Data as of 2 Nov 2026, 10:58 UTC

Severity
High

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS
0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in f2a24101e89dd0804e717da7c1bd6af513698aa2, d3219c229d16900cef936adad28633c98946e432, a8c47e62d9aea2d47a09e06c1682c59c21b92449 +4

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Oct 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 2 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ d7a252708dbc950ca2064310217e8b9f85846e2f, < f2a24101e89dd0804e717da7c1bd6af513698aa2
Fixed in
  • f2a24101e89dd0804e717da7c1bd6af513698aa2
LinuxLinuxAffected
  • ≥ d7a252708dbc950ca2064310217e8b9f85846e2f, < d3219c229d16900cef936adad28633c98946e432
Fixed in
  • d3219c229d16900cef936adad28633c98946e432
LinuxLinuxAffected
  • ≥ d7a252708dbc950ca2064310217e8b9f85846e2f, < a8c47e62d9aea2d47a09e06c1682c59c21b92449
Fixed in
  • a8c47e62d9aea2d47a09e06c1682c59c21b92449
LinuxLinuxAffected
  • ≥ d7a252708dbc950ca2064310217e8b9f85846e2f, < a0b79cdfcf34b53c85bac2d3cf022fc1342eeca0
Fixed in
  • a0b79cdfcf34b53c85bac2d3cf022fc1342eeca0
LinuxLinuxAffected
  • ≥ d7a252708dbc950ca2064310217e8b9f85846e2f, < 394ae398337c5f87e567f6cd63b937fc2b2f6ddc
Fixed in
  • 394ae398337c5f87e567f6cd63b937fc2b2f6ddc
LinuxLinuxAffected
  • ≥ d7a252708dbc950ca2064310217e8b9f85846e2f, < 8e4cbcca1e0a2fc5e6c8edb68e0cf5f2587f9319
Fixed in
  • 8e4cbcca1e0a2fc5e6c8edb68e0cf5f2587f9319

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

This vulnerability, identified as CVE-2026-98626, concerns the BPF (Berkeley Packet Filter) subsystem and involves restricting CO-RE (Compile Once - Run Everywhere) poisoning to relocatable instructions. The advisory is from Microsoft Security Response Center and affects specific versions 3.0 and 4.0 of the Microsoft product. No CVSS score or detailed impact information is provided, and no known exploits are reported in the wild.

References

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