Bug 2429047 (CVE-2025-71100)

Summary: CVE-2025-71100 kernel: wifi: rtlwifi: 8192cu: fix tid out of range in rtl92cu_tx_fill_desc()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2026-01-13 16:03:00 UTC 
In the Linux kernel, the following vulnerability has been resolved:

wifi: rtlwifi: 8192cu: fix tid out of range in rtl92cu_tx_fill_desc()

TID getting from ieee80211_get_tid() might be out of range of array size
of sta_entry->tids[], so check TID is less than MAX_TID_COUNT. Othwerwise,
UBSAN warn:

 UBSAN: array-index-out-of-bounds in drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c:514:30
 index 10 is out of range for type 'rtl_tid_data [9]'
Comment 1 Jon Moroney 2026-01-15 03:31:49 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026011345-CVE-2025-71100-537f@gregkh/T