Skip to main content
CVE-2026-97559VulnerabilityPublished Updated

Microsoft · smb: client: fail DACL rewrite when the new DACL exceeds 64K

Affects MicrosoftSource GCVE Database

0
Compare
Authoritative record:CVE-2026-97559· Medium

Not known to be exploited · fixed in f033d6e5aadf3e8c6a12873110557ed40cd71388 : update Microsoft when convenient.

Data as of 7 Nov 2026, 12:35 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in f033d6e5aadf3e8c6a12873110557ed40cd71388, ee13d687d06a6fbb2008625dd560c654231b28e0, d05045177a855386bca5e1909e08d06290e6e3b3 +3

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
  • ≥ f5065508897a922327f32223082325d10b069ebc, < f033d6e5aadf3e8c6a12873110557ed40cd71388
Fixed in
  • f033d6e5aadf3e8c6a12873110557ed40cd71388
LinuxLinuxAffected
  • ≥ f5065508897a922327f32223082325d10b069ebc, < ee13d687d06a6fbb2008625dd560c654231b28e0
Fixed in
  • ee13d687d06a6fbb2008625dd560c654231b28e0
LinuxLinuxAffected
  • ≥ f5065508897a922327f32223082325d10b069ebc, < d05045177a855386bca5e1909e08d06290e6e3b3
Fixed in
  • d05045177a855386bca5e1909e08d06290e6e3b3
LinuxLinuxAffected
  • ≥ f5065508897a922327f32223082325d10b069ebc, < d433376abc47e10870ae732f89c7c1a60b199a0c
Fixed in
  • d433376abc47e10870ae732f89c7c1a60b199a0c
LinuxLinuxAffected
  • ≥ f5065508897a922327f32223082325d10b069ebc, < 284877c6189fda1ac3d81771dd8482660a0c7dc1
Fixed in
  • 284877c6189fda1ac3d81771dd8482660a0c7dc1
LinuxLinuxAffected
  • ≥ f5065508897a922327f32223082325d10b069ebc, < 2ef532a01f44687f5b95001e88247cf05bff9892
Fixed in
  • 2ef532a01f44687f5b95001e88247cf05bff9892

Description

A vulnerability identified as CVE-2026-97559 affects Microsoft SMB client versions 3.0 and 4.0, involving a failure in Discretionary Access Control List (DACL) rewriting when the new DACL exceeds 64KB in size. The issue is published but lacks detailed technical or impact information and no CVSS score is assigned.

References

Community reviews

Loading reviews…