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CVE-2026-98990VulnerabilityPublished Updated

Microsoft · namespace: check a submount for references right before unmounting it

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-98990· High

Not known to be exploited · fixed in f6394281834492c6516a405a348b545ae698a331 : patch Microsoft soon.

Data as of 7 Nov 2026, 12:19 UTC

Severity
High

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in f6394281834492c6516a405a348b545ae698a331, d73f04e92c1aab78d96ac6cadb234c8a3a373d22, cda0c4e502a0f74a191471ce100fb061e5ab35d6 +9

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 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 7 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • >=4.1.40 <4.2
  • >=4.4.54 <4.5
  • >=4.9.15 <4.10
  • >=4.10.3 <4.11
Fixed in
  • f6394281834492c6516a405a348b545ae698a331
  • d73f04e92c1aab78d96ac6cadb234c8a3a373d22
  • cda0c4e502a0f74a191471ce100fb061e5ab35d6
  • 18902a23ef36f83d32bafc58ae2484e6bb4bb8ef
  • 361f59e7f3f9a219fb5567bf9abc8482a154a399
  • 32bf92416614a1e3ff3524fc6b780259c7aad3ef
  • 6e4012e571867868b545c91ca9d6095fdb709907
  • 4.11
  • 4.10
  • 4.5
  • 4.2
  • 3f55f71291e4332983cd63b288d1f2be3c9c08fc
LinuxLinuxAffected
  • =4.11
Fixed in–

Description

To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

References

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