CVE-2023-1523

Name: CVE-2023-1523
Creator: NVD / NIST
Published: 2023-09-01T19:15:42.707+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 10/10EPSS 1.45%

Last modified Jun 17, 2026

CVE-2023-1523 is a critical-severity vulnerability rated 10/10 on the CVSS scale. Using the TIOCLINUX ioctl request, a malicious snap could inject contents into the input of the controlling terminal which could allow it to cause arbitrary commands to be executed outside of the snap sandbox after the snap exits. Graphical terminal emulators like xterm, gnome-terminal and others are not affected - this can only be exploited when snaps are run on a virtual console.. EPSS estimates a 1.45% chance of exploitation in the next 30 days.

Description

Using the TIOCLINUX ioctl request, a malicious snap could inject contents into the input of the controlling terminal which could allow it to cause arbitrary commands to be executed outside of the snap sandbox after the snap exits. Graphical terminal emulators like xterm, gnome-terminal and others are not affected - this can only be exploited when snaps are run on a virtual console.

Metrics

CVSS 3.1

10/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS Probability

1.45%

70.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-74

Affected Software

Vendor	Product	Versions
Canonical	Snapd	< 2.59.5
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	20.04
Canonical	Ubuntu Linux	22.04
Canonical	Ubuntu Linux	22.10
Canonical	Ubuntu Linux	23.04

References

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1523Third Party Advisory
https://github.com/snapcore/snapd/pull/12849Issue Tracking, Patch
https://marc.info/?l=oss-security&m=167879021709955&w=2Exploit, Mailing List
https://ubuntu.com/security/notices/USN-6125-1Third Party Advisory
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1523Third Party Advisory
https://github.com/snapcore/snapd/pull/12849Issue Tracking, Patch
https://marc.info/?l=oss-security&m=167879021709955&w=2Exploit, Mailing List
https://ubuntu.com/security/notices/USN-6125-1Third Party Advisory

Timeline

Published: Sep 1, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-1523?

How severe is CVE-2023-1523?

CVE-2023-1523 has a CVSS score of 10/10 (CRITICAL severity). The EPSS model estimates a 1.45% probability of exploitation in the next 30 days.

How do I fix CVE-2023-1523?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-1523?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST