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Vulnerabilities

Vulnerability · CVE-2023-53762

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Fix UAF in hci_disconnect_all_sync Use-after-free can occur in hci_disconnect_all_sync if a

Published Dec 8, 2025 · catalog updated Oct 3, 2026 · Linux Linux

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2023-53762. EPSS is 0.25%. Act only if a listed version of Linux Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.25%
Remediation
Version ranges on file
Affected products
vendor Linux Linux 182ee45da083db4e3e621541ccf255bfa9652214 <ba3ba53ce1f76fc372b8f918fece4f9b1e41acd4

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Fix UAF in hci_disconnect_all_sync Use-after-free can occur in hci_disconnect_all_sync if a connection is deleted by concurrent processing of a controller event. To prevent this the code now tries to iterate over the list backwards to ensure the links are cleanup before its parents, also it no longer relies on a cursor, instead it always uses the last element since hci_abort_conn_sync is guaranteed to call hci_conn_del. UAF crash log: ================================================================== BUG:

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Linux Linux 182ee45da083db4e3e621541ccf255bfa9652214 <ba3ba53ce1f76fc372b8f918fece4f9b1e41acd4182ee45da083db4e3e621541ccf255bfa9652214 <ba3ba53ce1f76fc372b8f918fece4f9b1e41acd4

How to fix CVE-2023-53762

  • Upgrade

    CVE-2023-53762 lists a fix boundary at ba3ba53ce1f76fc372b8f918fece4f9b1e41acd4. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in 182ee45da083db4e3e621541ccf255bfa9652214 <ba3ba53ce1f76fc372b8f918fece4f9b1e41acd4

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2023-53762. EPSS is 0.25%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux 182ee45da083db4e3e621541ccf255bfa9652214 <ba3ba53ce1f76fc372b8f918fece4f9b1e41acd4 182ee45da083db4e3e621541ccf255bfa9652214 <ba3ba53ce1f76fc372b8f918fece4f9b1e41acd4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.25%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 8, 2025 · EUVD

    Detected

    In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Fix UAF in hci_disconnect_all_sync Use-after-free can occur in hci_disconnect_all_sync if a connection is deleted by concurrent processing of a controller event. To prevent this the code now tries to iterate over the list backwards to ensure the links are cleanup before its parents, also it no longer relies on

  2. Oct 3, 2026 · EUVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Fix UAF in hci_disconnect_all_sync Use-after-free can occur in hci_disconnect_all_sync if a connection is deleted by concurrent processing of a controller event. To prevent this the code now tries to iterate over the list backwards to ensure the links are cleanup before its parents, also it no longer relies on

Sources

  • CVE.orgVulnerability recordCVE-2023-53762

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-53762

    30-day exploitation probability 0.25%

    first.org
  • EUVDVulnerability recordEUVD-2023-60066

    In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Fix UAF in hci_disconnect_all_sync Use-after-free can occur in hci_disconnect_all_sync if a connection is deleted by concurrent processing of a controller event. To prevent this the code now

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • CVE.orgOct 26, 2026
  • EUVDOct 26, 2026