Microsoft · mmc: core: Add validation for host-provided max_segs
Affects MicrosoftSource GCVE Database
Not known to be exploited · fixed in c465608bd25d7f8565be7817a6a36a5d69f8aa14 : patch Microsoft soon.
Data as of 2 Nov 2026, 10:58 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Thin evidence
One scorer or none- EPSS
- 0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in c465608bd25d7f8565be7817a6a36a5d69f8aa14, b037c2f7794aa01ee2a00e43c29645fd2dd2dfb9, a8283f7d93f0d9336b15618b9665279ff6944319 +3
Exploitation evidence
Disclosed: evidence found.
CVE published 23 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 2 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | 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
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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Description
CVE-2026-98884 is a vulnerability in Microsoft software related to the 'mmc: core' component, specifically involving the addition of validation for host-provided max_segs. The advisory references the Microsoft Support Lifecycle for determining software support status. No detailed technical or impact information is provided.