CVE-2026-53107

Local service interruption via interrupt-context URB cancellation

Published Jun 24, 2026 · Updated Jun 24, 2026

Improper URB handling in the Linux Kernel libertas USB Wi-Fi driver allows local users to interrupt service during transmit serialization. The usb_tx_block() path calls usb_kill_urb() or usb_kill_anchored_urbs() from interrupt context even though those routines synchronously wait and can sleep. Exposure requires the libertas USB driver, a pending transmit URB, and execution through an HCD giveback path; the published impact is limited to availability.

CVSS severity5.5
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper URB handling in the Linux Kernel libertas USB Wi-Fi driver allows local users to interrupt service during transmit serialization. The usb_tx_block() path calls usb_kill_urb() or usb_kill_anchored_urbs() from interrupt context even though those routines synchronously wait and can sleep. Exposure requires the libertas USB driver, a pending transmit URB, and execution through an HCD giveback path; the published impact is limited to availability.

The record

CVE
CVE-2026-53107
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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=2902a9b4415a6bafc9b1e5dd360f065d757a0bb7
  2. Affected versionversion=3308c7504e093b22e91a4468470309cee2e26b83 <00c0317cebf44151df18fb647781f315268cdd98
  3. Affected versionversion=498525d8358d6d20918787e59736d5b6a021e9fd
  4. Affected versionversion=5.10.252 <5.11
  5. Affected versionversion=5.15.202 <5.16
  6. Affected versionversion=5bfb25495e391a1be0db94b15715174fa06b93a1
  7. Affected versionversion=6.1.165 <6.2
  8. Affected versionversion=6.12.75 <6.13
  9. Affected versionversion=6.18.16 <6.18.33
  10. Affected versionversion=6.19.6 <6.20
  11. Affected versionversion=6.6.128 <6.7
  12. Affected versionversion=7.0
  13. Affected versionversion=948a39c95d0f8d73722910f8cdb7b6e3e9206232
  14. Affected versionversion=b82073564373e68c6ae3a96039fae14cd002a496
  15. Affected versionversion=d66676e6ca96bf8680f869a9bd6573b26c634622 <4f273d3f98ebc60c30bbfb3ed4a7f0477d3eaed2
  16. Affected versionversion=d66676e6ca96bf8680f869a9bd6573b26c634622 <7c5c2b661bdb78c1472b8833265c9ed1ee880039
  17. Affected versionversion=fc188b44547dea4e7350833171982a6312befde9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2902a9b4415a6bafc9b1e5dd360f065d757a0bb7; version=3308c7504e093b22e91a4468470309cee2e26b83 <00c0317cebf44151df18fb647781f315268cdd98; version=498525d8358d6d20918787e59736d5b6a021e9fd; version=5.10.252 <5.11; version=5.15.202 <5.16; version=5bfb25495e391a1be0db94b15715174fa06b93a1; version=6.1.165 <6.2; version=6.12.75 <6.13; version=6.18.16 <6.18.33; version=6.19.6 <6.20; version=6.6.128 <6.7; version=7.0; version=948a39c95d0f8d73722910f8cdb7b6e3e9206232; version=b82073564373e68c6ae3a96039fae14cd002a496; version=d66676e6ca96bf8680f869a9bd6573b26c634622 <4f273d3f98ebc60c30bbfb3ed4a7f0477d3eaed2; version=d66676e6ca96bf8680f869a9bd6573b26c634622 <7c5c2b661bdb78c1472b8833265c9ed1ee880039; version=fc188b44547dea4e7350833171982a6312befde9

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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