CVE-2026-80943

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]'.

CVSS v3 7.6 HIGH

7.6^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.7

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0c0b374e12d52af23ca741728db31091677cf9dc
https://git.kernel.org/stable/c/42785f7e8d31540e6172bbcf08a7cc3cae1086f8
https://git.kernel.org/stable/c/6e327f14e1c43e175bf530f9165b2cadff308553
https://git.kernel.org/stable/c/ed4f05d9f2f42fd866f55108db8123eefcc5fb33

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-11 20:18

Updated : 2026-09-13 07:17

NVD link : CVE-2026-80943

Mitre link : CVE-2026-80943

CVE.ORG link : CVE-2026-80943

JSON object : View

Products Affected

No product.

CWE

No CWE.

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