CVE-2026-80943

Out-of-bounds access via unchecked QoS TID

Published Sep 11, 2026 · Updated Sep 11, 2026

Out-of-bounds access in Linux 6.11 rtl8192du transmit handling allows attackers to index kernel aggregation state past its bounds. rtl92du_tx_fill_desc() accepts the four-bit QoS TID returned by ieee80211_get_tid() and uses values up to 15 to index the nine-entry sta_entry->tids[] array without a bounds check. Reachability requires active rtl8192du hardware and an outgoing QoS frame with TID 9 through 15; the disclosed evidence establishes an invalid kernel-memory access but no reliable crash, disclosure, or code-execution outcome.

CVSS severityUnavailable
Unscored
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in Linux 6.11 rtl8192du transmit handling allows attackers to index kernel aggregation state past its bounds. rtl92du_tx_fill_desc() accepts the four-bit QoS TID returned by ieee80211_get_tid() and uses values up to 15 to index the nine-entry sta_entry->tids[] array without a bounds check. Reachability requires active rtl8192du hardware and an outgoing QoS frame with TID 9 through 15; the disclosed evidence establishes an invalid kernel-memory access but no reliable crash, disclosure, or code-execution outcome.

The record

CVE
CVE-2026-80943
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.11
  2. Affected versionversion=8321424134a400a5e3eb39f9acca6bc6946ff447 <0c0b374e12d52af23ca741728db31091677cf9dc
  3. Affected versionversion=8321424134a400a5e3eb39f9acca6bc6946ff447 <42785f7e8d31540e6172bbcf08a7cc3cae1086f8
  4. Affected versionversion=8321424134a400a5e3eb39f9acca6bc6946ff447 <6e327f14e1c43e175bf530f9165b2cadff308553
  5. Affected versionversion=8321424134a400a5e3eb39f9acca6bc6946ff447 <ed4f05d9f2f42fd866f55108db8123eefcc5fb33

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=8321424134a400a5e3eb39f9acca6bc6946ff447 <0c0b374e12d52af23ca741728db31091677cf9dc; version=8321424134a400a5e3eb39f9acca6bc6946ff447 <42785f7e8d31540e6172bbcf08a7cc3cae1086f8; version=8321424134a400a5e3eb39f9acca6bc6946ff447 <6e327f14e1c43e175bf530f9165b2cadff308553; version=8321424134a400a5e3eb39f9acca6bc6946ff447 <ed4f05d9f2f42fd866f55108db8123eefcc5fb33

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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