CVE-2023-53639

Automated-test disruption via ath6kl callback warning

Published Oct 7, 2025 · Updated Oct 7, 2025

Denial of service in Linux 3.9 through 6.3.1 allows local users to disrupt automated testing by triggering an ath6kl callback race. ath6kl_htc_pipe_rx_complete checks ar->htc_target after a USB callback can win an initialization race, but affected kernels issue a warning before returning safely. The race is correctly handled, with no reported data corruption; the documented consequence is limited to warning-driven disruption of automated testing.

CVSS severity5.5
Medium
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

Denial of service in Linux 3.9 through 6.3.1 allows local users to disrupt automated testing by triggering an ath6kl callback race. ath6kl_htc_pipe_rx_complete checks ar->htc_target after a USB callback can win an initialization race, but affected kernels issue a warning before returning safely. The race is correctly handled, with no reported data corruption; the documented consequence is limited to warning-driven disruption of automated testing.

The record

CVE
CVE-2023-53639
Published
Oct 7, 2025
Updated
Oct 7, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 7, 2025Record 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=3.9
  2. Affected versionversion=de2070fc4aa7c0205348010f500f5abce012e67b <0d1792c98351b7c8ebdc53d052918e77d1e512c3
  3. Affected versionversion=de2070fc4aa7c0205348010f500f5abce012e67b <1300517e371e4d0acdb0f1237477e1ed223c3a9a
  4. Affected versionversion=de2070fc4aa7c0205348010f500f5abce012e67b <484d95c69fc1143f09e4c2e3b89019d68d190a92
  5. Affected versionversion=de2070fc4aa7c0205348010f500f5abce012e67b <644df7e865e76ab7a62c67c25cbbc093c944d0ef
  6. Affected versionversion=de2070fc4aa7c0205348010f500f5abce012e67b <6f93154d61b345acbc405c6dee16afb845eb298e
  7. Affected versionversion=de2070fc4aa7c0205348010f500f5abce012e67b <75c4a8154cb6c7239fb55d5550f481f6765fb83c
  8. Affected versionversion=de2070fc4aa7c0205348010f500f5abce012e67b <cbec770521ebc455c9811a23222faf8911422d4a
  9. Affected versionversion=de2070fc4aa7c0205348010f500f5abce012e67b <e7865f84adaf75cee1a4bbf79680329eca92b4e1
  10. Affected versionversion=de2070fc4aa7c0205348010f500f5abce012e67b <f2a429e6da37e32438a9adc250cc176a889c16a4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.9; version=de2070fc4aa7c0205348010f500f5abce012e67b <0d1792c98351b7c8ebdc53d052918e77d1e512c3; version=de2070fc4aa7c0205348010f500f5abce012e67b <1300517e371e4d0acdb0f1237477e1ed223c3a9a; version=de2070fc4aa7c0205348010f500f5abce012e67b <484d95c69fc1143f09e4c2e3b89019d68d190a92; version=de2070fc4aa7c0205348010f500f5abce012e67b <644df7e865e76ab7a62c67c25cbbc093c944d0ef; version=de2070fc4aa7c0205348010f500f5abce012e67b <6f93154d61b345acbc405c6dee16afb845eb298e; version=de2070fc4aa7c0205348010f500f5abce012e67b <75c4a8154cb6c7239fb55d5550f481f6765fb83c; version=de2070fc4aa7c0205348010f500f5abce012e67b <cbec770521ebc455c9811a23222faf8911422d4a; version=de2070fc4aa7c0205348010f500f5abce012e67b <e7865f84adaf75cee1a4bbf79680329eca92b4e1; version=de2070fc4aa7c0205348010f500f5abce012e67b <f2a429e6da37e32438a9adc250cc176a889c16a4

Published CVSS scores

2.5SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
5.5NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
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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