CVE-2023-3567

Advisory lineage Upstream: 0 Downstream: 65
Modified
Published: 24 Jul 2023, 15:19
Last modified:06 Nov 2025, 19:46

Vulnerability Summary

Overall Risk (default)
medium
28/100
CVSS Score
7.1 HIGH
v3.1 (cve.org)
EPSS Score
<0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

24 Jul 2023, 15:19
Published
Vulnerability first disclosed
06 Nov 2025, 19:46
Last Modified
Vulnerability information updated

Description

A use-after-free flaw was found in vcs_read in drivers/tty/vt/vc_screen.c in vc_screen in the Linux Kernel. This issue may allow an attacker with local user access to cause a system crash or leak internal kernel information.

CVSS Metrics

  • v3.1•HIGH•Score: 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 1%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04 | 18.04 | 20.04 | 22.04

  • linux•linux_kernel

    < 6.2.0 | 6.2.0:rc1 | 6.2.0:rc2 | 6.2.0:rc3 | 6.2.0:rc4 | 6.2.0:rc5 | 6.2.0:rc6

  • redhat•enterprise_linux

    8.0 | 9.0

References (14)