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CVE-2026-98590VulnerabilityPublished Updated

Microsoft · bpf: Fix bpf_sock context code generation

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-98590· Medium

Not known to be exploited · fixed in ea4dc96c902ccfa49dd3e4f23c443dab4a74b018 : update Microsoft when convenient.

Data as of 2 Nov 2026, 10:58 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS
0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in ea4dc96c902ccfa49dd3e4f23c443dab4a74b018, e3ddcf4aeb342d4de2e5761c7042270d454752de, d95dd5a6c6cd08d5ae466d3aed27b3cf59155a6c +5

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
  • ≥ c3c16f2ea6d20159903cf93afbb1155f3d8348d5, < ea4dc96c902ccfa49dd3e4f23c443dab4a74b018
Fixed in
  • ea4dc96c902ccfa49dd3e4f23c443dab4a74b018
LinuxLinuxAffected
  • ≥ c3c16f2ea6d20159903cf93afbb1155f3d8348d5, < e3ddcf4aeb342d4de2e5761c7042270d454752de
Fixed in
  • e3ddcf4aeb342d4de2e5761c7042270d454752de
LinuxLinuxAffected
  • ≥ c3c16f2ea6d20159903cf93afbb1155f3d8348d5, < d95dd5a6c6cd08d5ae466d3aed27b3cf59155a6c
Fixed in
  • d95dd5a6c6cd08d5ae466d3aed27b3cf59155a6c
LinuxLinuxAffected
  • ≥ c3c16f2ea6d20159903cf93afbb1155f3d8348d5, < b3f37afc7fd7c52bc2114310aff1eb24c7cd4d73
Fixed in
  • b3f37afc7fd7c52bc2114310aff1eb24c7cd4d73
LinuxLinuxAffected
  • ≥ c3c16f2ea6d20159903cf93afbb1155f3d8348d5, < 70288599d1754e157df8326239316dbdf08ea33c
Fixed in
  • 70288599d1754e157df8326239316dbdf08ea33c
LinuxLinuxAffected
  • ≥ c3c16f2ea6d20159903cf93afbb1155f3d8348d5, < 84ebb991ae985149079ae9ab51b7e3ba25a9ff53
Fixed in
  • 84ebb991ae985149079ae9ab51b7e3ba25a9ff53

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

Description

CVE-2026-98590 is a vulnerability related to the bpf_sock context code generation in Microsoft software versions 3.0 and 4.0. The advisory does not provide detailed technical information or impact specifics. No CVSS score or exploit information is available.

References

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