Description
OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference in cupsdCheckJobs() when a job marked job-held-on-create refers to a temporary printer that has been automatically deleted. Temporary-printer cleanup can remove the destination without canceling its held jobs, and the scheduler dereferences the NULL result of cupsdFindDest() while checking holding_new_jobs. This terminates cupsd and interrupts all queues managed by that process. In some plausible scenarios, an unprivileged submission can trigger this.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenPrinting | CUPS | < 2.4.20 | 2.4.20 |
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 | 2.4.20-1 | — |
| Debian 13 | cups | No fix yet | — |
| Debian 12 | cups | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | cups | No fix yet | — |
| Ubuntu 26.04 LTS | cups | No fix yet | — |
| Ubuntu 24.04 LTS | cups | No fix yet | — |
| Ubuntu 22.04 LTS | cups | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | cups | No fix yet | — |
| Ubuntu Pro 18.04 LTS | cups | No fix yet | — |
| Ubuntu Pro 16.04 LTS | cups | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | cups +7 | 2.4.19-4.5.hum1 | RHSA-2026:81410 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | cups +7 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | cups | No fix yet | — |
Advisories 3
- ALAS2023-2026-3415 Moderate: cups security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Nov 9, 2026
- RHSA-2026:81410 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- WID-SEC-2026-3715 CUPS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 12, 2026