What is CVE-2023-3567?

CVE-2023-3567 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.1/10. Published 2023-07-24.

How severe is CVE-2023-3567?

High severity. CVSS v3 base score is 7.1 out of 10.

Is CVE-2023-3567 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Use After Free in Linux Kernel

CVE-2023-3567

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.

Vulnerability class: Use-After-Free

EPSS: 0.004 (34.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Affected products

Linux Linux_kernel — versions 6.2.0
Canonical Ubuntu_linux — versions 14.04, 16.04, 18.04
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8 — versions 0:4.18.0-553.rt7.342.el8_10, 0:4.18.0-553.el8_10
Red Hat Enterprise Linux 8.6 Extended Update Support — versions 0:4.18.0-372.87.1.el8_6
Red Hat Enterprise Linux 8.8 Extended Update Support — versions 0:4.18.0-477.43.1.el8_8
Red Hat Enterprise Linux 9 — versions 0:5.14.0-427.13.1.el9_4
Red Hat Enterprise Linux 9.0 Extended Update Support — versions 0:5.14.0-70.85.1.el9_0, 0:5.14.0-70.85.1.rt21.156.el9_0
Red Hat Enterprise Linux 9.2 Extended Update Support — versions 0:5.14.0-284.48.1.el9_2, 0:5.14.0-284.48.1.rt14.333.el9_2

Weakness classification (CWE)

CWE-416 — Use After Free

Public proof-of-concept exploits

References

secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2023-3567?: CVE-2023-3567 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.1/10. Published 2023-07-24.
How severe is CVE-2023-3567?: High severity. CVSS v3 base score is 7.1 out of 10.
Is CVE-2023-3567 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.