smb/client: zero-initialize stack-allocated cifs_open_info_data (CVE-2026-93801) | HOL Guard CVE

High · CVSS 7.0CVE-2026-93801

smb/client: zero-initialize stack-allocated cifs_open_info_data

Answer in brief

CVE-2026-93801 records a High severity (CVSS 7.0) vulnerability in smb/client: zero-initialize stack-allocated cifs_open_info_data. The current sources do not mark it as known exploited. The current feed maps Linux/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 Sep 24, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.0
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.0. 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/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <74ff47e6c4213fcfeba2de448d9cbda200507d22 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <22532dd88694ed20bdd47523ffa709f166ce776b \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8fce4cf4369c766a3293a05419500cbfde72e60d \|\| >=0 <6.12.111 \|\| >=0 <6.18.53	74ff47e6c4213fcfeba2de448d9cbda200507d22, 22532dd88694ed20bdd47523ffa709f166ce776b, 8fce4cf4369c766a3293a05419500cbfde72e60d, 6.12.111, 6.18.53

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux.
Review the reported fix. Update Linux/Linux to 74ff47e6c4213fcfeba2de448d9cbda200507d22 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: smb/client: zero-initialize stack-allocated cifs_open_info_data Stack-allocated cifs_open_info_data may contain random data. This can make some fields have wrong value if they are not set later.

Quoted source text, attributed separately from HOL analysis.