CVE-2026-80943

CVE CVE-2026-80943EUVD EUVD-2026-76266Published 2026-09-11T19:42:15.000ZLast changed 2026-09-13T06:28:18.000ZCVSS 7.6

What the advisory describes

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]'.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.12.109; patch: 6.18.50; patch: 7.2.4; 8321424134a400a5e3eb39f9acca6bc6946ff447 <ed4f05d9f2f42fd866f55108db8123eefcc5fb33; patch: 7.3-rc1; 8321424134a400a5e3eb39f9acca6bc6946ff447 <42785f7e8d31540e6172bbcf08a7cc3cae1086f8; 8321424134a400a5e3eb39f9acca6bc6946ff447 <6e327f14e1c43e175bf530f9165b2cadff308553; 8321424134a400a5e3eb39f9acca6bc6946ff447 <0c0b374e12d52af23ca741728db31091677cf9dc; 6.11; patch: 0

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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