CVE-2026-80943High· 7.6▾ TwilightIn 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 i…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 5.9
none → medium
— → 5.9
none → medium
— → 7.6
none → high
7.6 → 5.9
high → medium
7.6 → 5.5
high → medium
0.2% → 0.4%
Last analysed / modified upstream
5.5 → 7.6
medium → high
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]'.
Linux >= 8321424134a400a5e3eb39f9acca6bc6946ff447 < 6e327f14e1c43e175bf530f9165b2cadff308553Linux >= 8321424134a400a5e3eb39f9acca6bc6946ff447 < 0c0b374e12d52af23ca741728db31091677cf9dcLinux >= 8321424134a400a5e3eb39f9acca6bc6946ff447 < 42785f7e8d31540e6172bbcf08a7cc3cae1086f8Linux >= 8321424134a400a5e3eb39f9acca6bc6946ff447 < ed4f05d9f2f42fd866f55108db8123eefcc5fb33Linux 6.11Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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