Vulnerability · Published Apr 3, 2026 · Assigned by GitHub_M
CVE-2026-34979OpenPrinting CUPS: Heap overflow in `get_options()`
Medium 5.3
In plain English
A medium-severity heap buffer overflow in cups from OpenPrinting. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.4%top 64.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, there is a heap-based buffer overflow in the CUPS scheduler when building filter option strings from job attribute. At time of publication, there are no publicly available patches.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | cups | 2.4.18-r0 | ALPINE-CVE-2026-34979 |
| Alpine:v3.21 | cups | 2.4.18-r0 | ALPINE-CVE-2026-34979 |
| Alpine:v3.22 | cups | 2.4.18-r0 | ALPINE-CVE-2026-34979 |
| Alpine:v3.23 | cups | 2.4.18-r0 | ALPINE-CVE-2026-34979 |
| Alpine:v3.24 | cups | 2.4.18-r0 | ALPINE-CVE-2026-34979 |
| Debian:12 | cups | no fix listed | DEBIAN-CVE-2026-34979 |
| Debian:13 | cups | no fix listed | DEBIAN-CVE-2026-34979 |
| Debian:14 | cups | 2.4.17-1 | DEBIAN-CVE-2026-34979 |
| Ubuntu:22.04:LTS | cups | 2.4.1op1-1ubuntu4.20 | USN-8405-1 |
| Ubuntu:22.04:LTS | cups | 2.4.1op1-1ubuntu4.20 | UBUNTU-CVE-2026-34979 |
| Ubuntu:24.04:LTS | cups | 2.4.7-1.2ubuntu7.13 | USN-8405-1 |
| Ubuntu:24.04:LTS | cups | 2.4.7-1.2ubuntu7.13 | UBUNTU-CVE-2026-34979 |
| Ubuntu:25.10 | cups | 2.4.12-0ubuntu3.9 | UBUNTU-CVE-2026-34979 |
| Ubuntu:25.10 | cups | 2.4.12-0ubuntu3.9 | USN-8405-1 |
| Ubuntu:26.04:LTS | cups | 2.4.16-1ubuntu1.2 | USN-8405-1 |
| Ubuntu:26.04:LTS | cups | 2.4.16-1ubuntu1.2 | UBUNTU-CVE-2026-34979 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| OpenPrinting | cups | <= 2.4.16 |
Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
References
- https://github.com/OpenPrinting/cups/security/advisories/GHSA-6qxf-7jx6-86fh x_refsource_CONFIRM