wifi: rtlwifi: rtl8192du: check QoS TID before indexing tids
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]'.
CVE-2026-80943
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-80943
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "8321424134a400a5e3eb39f9acca6bc6946ff447",
"lessThan": "6e327f14e1c43e175bf530f9165b2cadff308553",
"versionType": "git"
},
{
"status": "affected",
"version": "8321424134a400a5e3eb39f9acca6bc6946ff447",
"lessThan": "0c0b374e12d52af23ca741728db31091677cf9dc",
"versionType": "git"
},
{
"status": "affected",
"version": "8321424134a400a5e3eb39f9acca6bc6946ff447",
"lessThan": "42785f7e8d31540e6172bbcf08a7cc3cae1086f8",
"versionType": "git"
},
{
"status": "affected",
"version": "8321424134a400a5e3eb39f9acca6bc6946ff447",
"lessThan": "ed4f05d9f2f42fd866f55108db8123eefcc5fb33",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/wireless/realtek/rtlwifi/rtl8192du/trx.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/wireless/realtek/rtlwifi/rtl8192du/trx.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80943
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34903 · Revision 1
- Added to Heist Feed
- Publisher date