CVE-2026-80943

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-80943

Key Details

CVE	CVE-2026-80943
CVSS Score / Version	7.6 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H`
CVSS Prose	attack vector is adjacent; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is low; integrity impact is low; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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]'. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-80943
CVE	https://www.cve.org/CVERecord?id=CVE-2026-80943

Source

Reference

NVD

CVE