CVE-2023-23039

Use-after-free via concurrent VCC device removal

Published Feb 22, 2023 · Updated Mar 20, 2025

Race condition in the Linux kernel VCC driver through 6.2.0-rc2 allows physically proximate attackers to trigger a use-after-free. vcc_remove() frees the vcc_port structure while vcc_open() can still dereference it because removal does not wait for the open reference to close. Exploitation requires physical access to remove a VCC device concurrently with open(), and public sources do not specify the resulting system behavior beyond the use-after-free condition.

CVSS severity5.7
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux kernel VCC driver through 6.2.0-rc2 allows physically proximate attackers to trigger a use-after-free. vcc_remove() frees the vcc_port structure while vcc_open() can still dereference it because removal does not wait for the open reference to close. Exploitation requires physical access to remove a VCC device concurrently with open(), and public sources do not specify the resulting system behavior beyond the use-after-free condition.

The record

CVE
CVE-2023-23039
Published
Feb 22, 2023
Updated
Mar 20, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-362
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.7NIST NVDCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
5.7CISA-ADPCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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