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Vulnerability record · CVE-2018-6553 · published 10 August 2018

CVE-2018-6553: Cups vulnerability

Cups · Cups

The CUPS AppArmor profile incorrectly confined the dnssd backend due to use of hard links. A local attacker could possibly use this issue to escape confinement. This flaw affects versions prior to 2.2.7-1ubuntu2.1 in Ubuntu 18.04 LTS, prior to 2.2.4-7ubuntu3.1 in Ubuntu 17.10, prior to 2.1.3-4ubuntu0.5 in Ubuntu 16.04 LTS, and prior to 1.7.2-0ubuntu1.10 in Ubuntu 14.04 LTS.

8.8 CVSS 3.0 High EPSS 0.39% · top 70.1%
8.8CVSS 3.0 base score, v2 4.6
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

The CUPS AppArmor profile incorrectly confined the dnssd backend due to use of hard links. A local attacker could possibly use this issue to escape confinement. This flaw affects versions prior to 2.2.7-1ubuntu2.1 in Ubuntu 18.04 LTS, prior to 2.2.4-7ubuntu3.1 in Ubuntu 17.10, prior to 2.1.3-4ubuntu0.5 in Ubuntu 16.04 LTS, and prior to 1.7.2-0ubuntu1.10 in Ubuntu 14.04 LTS.

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://lists.debian.org/debian-lts-announce/2018/07/msg00014.html Issue TrackingMailing ListThird Party Advisory
https://security.gentoo.org/glsa/201908-08
https://usn.ubuntu.com/usn/usn-3713-1 Third Party Advisory
https://www.debian.org/security/2018/dsa-4243 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00014.html Issue TrackingMailing ListThird Party Advisory
https://security.gentoo.org/glsa/201908-08
https://usn.ubuntu.com/usn/usn-3713-1 Third Party Advisory
https://www.debian.org/security/2018/dsa-4243 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-6553), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.