wifi: iwlwifi: mvm: validate TX_CMD response layout (CVE-2026-93793) | HOL Guard CVE

High · CVSS 8.8CVE-2026-93793

wifi: iwlwifi: mvm: validate TX_CMD response layout

Answer in brief

CVE-2026-93793 records a High severity (CVSS 8.8) vulnerability in wifi: iwlwifi: mvm: validate TX_CMD response layout. 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 8.8
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 8.8. 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 <fc14f5fe8a4374ed1088cfbddc1dae4d16c9935b \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4d942dfc13aec393e003ab28ff58db744c26e6eb \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8d70881707b47353359df57df12f6de67fdacdd2 \|\| >=0 <6.12.111 \|\| >=0 <6.18.53	fc14f5fe8a4374ed1088cfbddc1dae4d16c9935b, 4d942dfc13aec393e003ab28ff58db744c26e6eb, 8d70881707b47353359df57df12f6de67fdacdd2, 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 fc14f5fe8a4374ed1088cfbddc1dae4d16c9935b 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: wifi: iwlwifi: mvm: validate TX_CMD response layout TX_CMD parsing uses frame_count to walk status entries and then read the trailing SCD SSN. Make the minimum-length check follow that exact runtime layout calculation before parsing the payload. For new TX API, reject TX_CMD responses with frame_count != 1 and warn/return in the aggregation handler to document that aggregated accounting is expected via BA notifications.

Quoted source text, attributed separately from HOL analysis.