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CVE-2026-98473VulnerabilityPublished Updated

Microsoft · s390/vfio-ap: fix KVM GISC and page leak when queue removed from host config

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-98473· Medium

Not known to be exploited · fixed in da69d3ac53490724eba0ade9deb4e539a6ae9034 : update Microsoft when convenient.

Data as of 29 Oct 2026, 10:37 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS
0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in da69d3ac53490724eba0ade9deb4e539a6ae9034, cf441a0db681dfad5e89b015d6be11365159d7a9, 65e05ec252a9b79e75930d3c4dd42d8877db04c5 +3

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 29 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • >=6.6.15 <6.7
  • >=6.7.3 <6.8
Fixed in
  • da69d3ac53490724eba0ade9deb4e539a6ae9034
  • cf441a0db681dfad5e89b015d6be11365159d7a9
  • 65e05ec252a9b79e75930d3c4dd42d8877db04c5
  • 6.8
  • 6.7
  • 3c3433657c82f200dae36c29e2b80681c81b85be
LinuxLinuxAffected
  • =6.8
Fixed in–

Description

This vulnerability, identified as CVE-2026-98473, relates to the s390/vfio-ap component and involves fixing KVM GISC and a page leak when a queue is removed from the host configuration. It affects Microsoft products with versions 3.0 and 4.0. The published information does not include a CVSS score or detailed impact analysis.

References

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