wifi: rtlwifi: rtl8192du: check QoS TID before indexing tids (CVE-2026-80943) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80943

wifi: rtlwifi: rtl8192du: check QoS TID before indexing tids

Answer in brief

CVE-2026-80943 records a Unknown severity vulnerability in wifi: rtlwifi: rtl8192du: check QoS TID before indexing tids. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
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), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=8321424134a400a5e3eb39f9acca6bc6946ff447 <6e327f14e1c43e175bf530f9165b2cadff308553 \|\| >=8321424134a400a5e3eb39f9acca6bc6946ff447 <0c0b374e12d52af23ca741728db31091677cf9dc \|\| >=8321424134a400a5e3eb39f9acca6bc6946ff447 <42785f7e8d31540e6172bbcf08a7cc3cae1086f8 \|\| >=8321424134a400a5e3eb39f9acca6bc6946ff447 <ed4f05d9f2f42fd866f55108db8123eefcc5fb33	6e327f14e1c43e175bf530f9165b2cadff308553, 0c0b374e12d52af23ca741728db31091677cf9dc, 42785f7e8d31540e6172bbcf08a7cc3cae1086f8, ed4f05d9f2f42fd866f55108db8123eefcc5fb33
Linux/Linuxgeneric	6.11	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 6e327f14e1c43e175bf530f9165b2cadff308553 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: wifi: rtlwifi: rtl8192du: check QoS TID before indexing tids rtl92du_tx_fill_desc() uses ieee80211_get_tid() to read the QoS TID from the 802.11 header and then uses it as an index into sta_entry->tids[]. ieee80211_get_tid() returns the low 4-bit QoS TID value, so the result can be in the range 0..15. rtlwifi only allocates MAX_TID_COUNT entries for sta_entry->tids[], and MAX_TID_COUNT is 9. A QoS TID greater than 8 therefore indexes past the aggregation state array. Keep the default RTL_AGG_STOP state for out-of-range TIDs, matching rtl92cu_tx_fill_desc(). This issue was detected by our static analysis tool and confirmed by manual audit. UBSAN validation for the same bug pattern reports an array-index-out-of-bounds access with index 10 for type 'rtl_tid_data [9]'.

Quoted source text, attributed separately from HOL analysis.