CVE-2026-80947

Use-after-free via uncanceled RX worker during teardown

Published Sep 11, 2026 · Updated Sep 11, 2026

A use-after-free in the Linux kernel rtl8xxxu Wi-Fi driver allows attackers to access freed kernel memory during adapter disconnect. rtl8xxxu_stop() fails to cancel rx_urb_wq before ieee80211_free_hw() releases its private state, so the queued worker later dereferences priv and can re-anchor URBs after teardown. Reachability requires active RX traffic to push pending URBs above the watermark followed by a disconnect; the published record does not establish a demonstrated crash or code execution.

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

What happened

A use-after-free in the Linux kernel rtl8xxxu Wi-Fi driver allows attackers to access freed kernel memory during adapter disconnect. rtl8xxxu_stop() fails to cancel rx_urb_wq before ieee80211_free_hw() releases its private state, so the queued worker later dereferences priv and can re-anchor URBs after teardown. Reachability requires active RX traffic to push pending URBs above the watermark followed by a disconnect; the published record does not establish a demonstrated crash or code execution.

The record

CVE
CVE-2026-80947
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=26f1fad29ad973b0fb26a9ca3dcb2a73dde781aa <620acb1e8037b73a457dc8ef20fc23fc7adcb405
  2. Affected versionversion=26f1fad29ad973b0fb26a9ca3dcb2a73dde781aa <6c080026ecc17eecb103f8927c64ea73a74bb818
  3. Affected versionversion=26f1fad29ad973b0fb26a9ca3dcb2a73dde781aa <800d2b490a9af1e7132a3564c2ad5a81292e5b40
  4. Affected versionversion=26f1fad29ad973b0fb26a9ca3dcb2a73dde781aa <972ab8b9c08f3eb3fa535082de2950dd93604dfd
  5. Affected versionversion=4.4

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=26f1fad29ad973b0fb26a9ca3dcb2a73dde781aa <620acb1e8037b73a457dc8ef20fc23fc7adcb405; version=26f1fad29ad973b0fb26a9ca3dcb2a73dde781aa <6c080026ecc17eecb103f8927c64ea73a74bb818; version=26f1fad29ad973b0fb26a9ca3dcb2a73dde781aa <800d2b490a9af1e7132a3564c2ad5a81292e5b40; version=26f1fad29ad973b0fb26a9ca3dcb2a73dde781aa <972ab8b9c08f3eb3fa535082de2950dd93604dfd; version=4.4

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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