High · CVSS 7.5CVE-2023-32256

Kernel: ksmbd race issue from smb2 close and logoff with multichannelCVE-2023-32256

Answer in brief

CVE-2023-32256 records a High severity (CVSS 7.5) vulnerability in Kernel: ksmbd race issue from smb2 close and logoff with multichannel. The current sources do not mark it as known exploited. The current feed maps linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 1, 2025Updated Jun 29, 2026Source checked Nov 3, 2026First seen by HOL Jun 25, 2026Material review Jun 29, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
linuxgeneric	>=0 <5.15.145 \|\| >=6.0.0 <6.0.* \|\| >=6.1.0 <6.1.29 \|\| >=6.2.0 <6.2.16 \|\| >=6.3.0 <6.3.2	5.15.145, 6.0.*, 6.1.29, 6.2.16, 6.3.2

Recommended response

Check inventory. Check lockfiles and deployed manifests for linux.
Review the reported fix. Update linux to 5.15.145 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 1, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jun 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jun 25, 2026

Sources and claim methodology

Upstream source description

A flaw was found in the Linux kernel's ksmbd component. A race condition between smb2 close operation and logoff in multichannel connections could result in a use-after-free issue.

Quoted source text, attributed separately from HOL analysis.

Affected scope and exposure questions

The current feed maps linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
linuxgeneric	>=0 <5.15.145 \|\| >=6.0.0 <6.0.* \|\| >=6.1.0 <6.1.29 \|\| >=6.2.0 <6.2.16 \|\| >=6.3.0 <6.3.2	5.15.145, 6.0.*, 6.1.29, 6.2.16, 6.3.2

Sources and claim methodology

Upstream source description

A flaw was found in the Linux kernel's ksmbd component. A race condition between smb2 close operation and logoff in multichannel connections could result in a use-after-free issue.

Quoted source text, attributed separately from HOL analysis.