CVE-2023-23039

kernel: tty: vcc: race condition leading to use-after-free in vcc_open()

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Severity

Moderate

Red Hat Product Security

6.4

CVSS 3.1

Review impact separately from score.

Published · February 22, 2023

Updated · November 21, 2025

Description

A race condition leading to a use-after-free vulnerability was found in the Linux kernel's Sun Virtual Console Concentrator (VCC). This issue can result in a system crash or potential code execution if a physically proximate attacker removes a VCC device while calling open().

Statement

Red Hat Enterprise Linux is not affected by this flaw, as the Sun Virtual Console Concentrator (CONFIG_VCC) is not enabled in any current shipping kernels.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 6.4
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-416 · Use After Free