# CVE-2026-64612: OpenPrinting cups-filters denial of service in PNG image reading

Source: https://junglewise.ai/threats/cve-2026-64612-openprinting-cups-filters-denial-of-service-in-png-image-reading  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-20. Updated: 2026-07-20  
License: CC BY 4.0 with a link back

CVE-2026-64612 · Severity: high · CVSS 7.5 · Published 2026-07-20

A vulnerability exists in the software responsible for processing print jobs on Linux systems. By sending a specially crafted PNG image to a printer, an unauthorized user can cause the printing service to crash. This results in a denial of service, preventing the current print job from completing and potentially disrupting printing operations.

Technologies: [OpenPrinting Cups-Filters](https://junglewise.ai/threats/technologies/cups-filters), [OpenPrinting Libcupsfilters](https://junglewise.ai/threats/technologies/libcupsfilters), [Red Hat Enterprise Linux 10](https://junglewise.ai/threats/technologies/enterprise-linux-10), [Red Hat Enterprise Linux 8](https://junglewise.ai/threats/technologies/enterprise-linux-8), [Red Hat Enterprise Linux 9](https://junglewise.ai/threats/technologies/enterprise-linux-9). Vendors: [OpenPrinting](https://junglewise.ai/threats/vendors/openprinting), [Red Hat](https://junglewise.ai/threats/vendors/red-hat).

## Quick answers

**Is CVE-2026-64612 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-64612 being exploited in the wild.

**How severe is CVE-2026-64612?** High severity, with a CVSS score of 7.5, published 20 July 2026.

**Which products and versions are affected?** OpenPrinting Cups-Filters through 1.28.17; OpenPrinting Libcupsfilters through 2.1.1.

**Is there a fix for CVE-2026-64612?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-64612 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-64612?** Check whether you run OpenPrinting Cups-Filters, OpenPrinting Libcupsfilters, Red Hat Enterprise Linux 10 or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A flaw exists in the _cfImageReadPNG() and _cupsImageReadPNG() functions within cupsfilters/image-png.c. The software initializes a libpng reader using png_create_read_struct without implementing a custom error handler or a setjmp recovery frame. Consequently, when libpng encounters a malformed PNG file, it triggers the default error handler which calls abort(), leading to a SIGABRT and terminating the filter process. This allows a remote, unauthenticated attacker to cause a denial of service (DoS) for in-flight print jobs. As of the advisory date, no upstream fix is available.

## Affected products

- OpenPrinting cups-filters through 1.28.17
- OpenPrinting libcupsfilters through 2.1.1
- Red Hat Red Hat Enterprise Linux 8
- Red Hat Red Hat Enterprise Linux 9
- Red Hat Red Hat Enterprise Linux 10

## Timeline

- 2026-07-20: disclosed
- 2026-07-20: advisory

## References

- [https://access.redhat.com/downloads/content/package-browser/](https://access.redhat.com/downloads/content/package-browser/)
- [https://access.redhat.com/security/cve/CVE-2026-64612](https://access.redhat.com/security/cve/CVE-2026-64612)
- [https://bugzilla.redhat.com/show_bug.cgi?id=2502801](https://bugzilla.redhat.com/show_bug.cgi?id=2502801)
- [https://github.com/OpenPrinting/libcupsfilters/security/advisories/GHSA-7mxj-cfq5-84ch](https://github.com/OpenPrinting/libcupsfilters/security/advisories/GHSA-7mxj-cfq5-84ch)

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