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CVE-2026-98127VulnerabilityPublished Updated

Microsoft · smb/client: validate new EOF for insert range

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-98127· Medium

Not known to be exploited · fixed in f8cbfe3a3fcee7d991fd223f660f3e5df13221cf : update Microsoft when convenient.

Data as of 7 Nov 2026, 12:19 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Patch
Available – fixed in f8cbfe3a3fcee7d991fd223f660f3e5df13221cf, bc7602b9082ef195d913c4c16fa9853dd262333e, b7f2e33d9f5db7b8e6e5e0a5a93d0c5e31870356 +2

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Sep 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
  • ≥ 7fe6fe95b936084dce6eedcc2cccadf96eafae73, < f8cbfe3a3fcee7d991fd223f660f3e5df13221cf
Fixed in
  • f8cbfe3a3fcee7d991fd223f660f3e5df13221cf
LinuxLinuxAffected
  • ≥ 7fe6fe95b936084dce6eedcc2cccadf96eafae73, < bc7602b9082ef195d913c4c16fa9853dd262333e
Fixed in
  • bc7602b9082ef195d913c4c16fa9853dd262333e
LinuxLinuxAffected
  • ≥ 7fe6fe95b936084dce6eedcc2cccadf96eafae73, < b7f2e33d9f5db7b8e6e5e0a5a93d0c5e31870356
Fixed in
  • b7f2e33d9f5db7b8e6e5e0a5a93d0c5e31870356
LinuxLinuxAffected
  • ≥ 7fe6fe95b936084dce6eedcc2cccadf96eafae73, < 1519dc88c87f5346dae0464d7d6da1b6bf1f6e8e
Fixed in
  • 1519dc88c87f5346dae0464d7d6da1b6bf1f6e8e
LinuxLinuxAffected
  • ≥ 7fe6fe95b936084dce6eedcc2cccadf96eafae73, < 7c2c69045aa76ccaa7f16f1478eb312130ce4951
Fixed in
  • 7c2c69045aa76ccaa7f16f1478eb312130ce4951
LinuxLinuxAffected
  • =5.13
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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