wifi: rsi: validate beacon length before fixed buffer copy (CVE-2026-93802) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-93802

wifi: rsi: validate beacon length before fixed buffer copy

Answer in brief

CVE-2026-93802 records a Unknown severity vulnerability in wifi: rsi: validate beacon length before fixed buffer copy. 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 24, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 24, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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 <87710ad633ce4588aec88611d0d0745eb33a6991 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <266f195d5a14eec6c482fd09fbc924584c3371a7 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8ecdeb8b8a33b22c597299043c0dcfce50beb9ea \|\| >=0 <6.12.111 \|\| >=0 <6.18.53	87710ad633ce4588aec88611d0d0745eb33a6991, 266f195d5a14eec6c482fd09fbc924584c3371a7, 8ecdeb8b8a33b22c597299043c0dcfce50beb9ea, 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 87710ad633ce4588aec88611d0d0745eb33a6991 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 24, 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: rsi: validate beacon length before fixed buffer copy rsi_prepare_beacon() copies the mac80211 beacon frame after FRAME_DESC_SZ into a management skb whose usable tailroom may be smaller than MAX_MGMT_PKT_SIZE after alignment. Validate the beacon length against the actual tailroom before the copy and skb_put(). Leave ownership of the management skb with the caller on error, matching the existing rsi_send_beacon() cleanup path.

Quoted source text, attributed separately from HOL analysis.