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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | cups | unspecified – < 2.2.7-1ubuntu2.1, unspecified – < 2.2.4-7ubuntu3.1, unspecified – < 2.1.3-4ubuntu0.5, unspecified – < 1.7.2-0ubuntu1.10 | 2.2.7-1ubuntu2.1 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | cups | 2.2.8-5 | — |
| Debian 13 | cups | 2.2.8-5 | — |
| Debian 12 | cups | 2.2.8-5 | — |
| Debian 9 | cups | 2.2.1-8+deb9u2 | DSA-4243-1 |
| Debian 8 | cups | 1.7.5-11+deb8u4 | DLA-1426-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | cups | 2.2.7-1ubuntu2.1 | USN-3713-1 |
| Ubuntu 16.04 LTS | cups | 2.1.3-4ubuntu0.5 | USN-3713-1 |
| Ubuntu 14.04 LTS | cups | 1.7.2-0ubuntu1.10 | USN-3713-1 |
Advisories 3
- USN-3713-1 cups vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4243-1 cups - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1426-1 cups - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- USN-3713-1 vendor-advisory
- DSA-4243 vendor-advisory
- [debian-lts-announce] 20180714 [SECURITY] [DLA 1426-1] cups security update mailing-list
- GLSA-201908-08 vendor-advisory