CVE-2026-34980
Publication date 3 April 2026
Last updated 8 June 2026
Ubuntu priority
Description
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, in a network-exposed cupsd with a shared target queue, an unauthorized client can send a Print-Job to that shared PostScript queue without authentication. The server accepts a page-border value supplied as textWithoutLanguage, preserves an embedded newline through option escaping and reparse, and then reparses the resulting second-line PPD: text as a trusted scheduler control record. A follow-up raw print job can therefore make the server execute an attacker-chosen existing binary such as /usr/bin/vim as lp. At time of publication, there are no publicly available patches.
Mitigation
Do not expose the cupsd to the internet, including a shared PostScript queue. Enabling the PostScript queue would involve changing the default configuration.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| cups | 26.04 LTS resolute |
Fixed 2.4.16-1ubuntu1.2
|
| 25.10 questing |
Fixed 2.4.12-0ubuntu3.9
|
|
| 24.04 LTS noble |
Fixed 2.4.7-1.2ubuntu7.13
|
|
| 22.04 LTS jammy |
Fixed 2.4.1op1-1ubuntu4.20
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| Attack vector | Adjacent |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-8405-1
- CUPS vulnerabilities
- 8 June 2026