CVE-2026-64612 Red Hat CVE debrief

Who should care

Organizations using libcupsfilters and cups-filters for printing services should be aware of this vulnerability and take steps to mitigate it. This includes reviewing their exposure, planning for patching, and restricting access to print job submission to trusted users. Security teams and operators responsible for managing printing services should prioritize patching and monitor print job submissions for suspicious activity. Vulnerability management and security teams should also review the CVE record and assess their organization's exposure to this vulnerability. Additionally, platform administrators and IT teams may need to take action to secure their print services infrastructure. The vulnerability's impact is primarily related to denial of service attacks, and defenders should focus on securing print job submissions and patching vulnerable systems. Affected operators should also verify their systems and apply patches as needed. This vulnerability may require coordination with vendors and suppliers to ensure patching and mitigation efforts are effective. Security teams should also review compensating controls for exposed systems while remediation is scheduled and verified. Monitoring and detection capabilities may need to be updated to identify potential exploitation attempts. Asset inventory and configuration management may also be necessary to ensure that all affected systems are identified and patched. Overall, a range of stakeholders, including security teams, operators, and administrators, should be aware of this vulnerability and take steps to mitigate its impact. The CVE record provides limited evidence of the vulnerability's impact, and defenders should exercise caution when assessing their organization's exposure. Further analysis may be needed to fully understand the vulnerability's impact and exploitability. However, based on the available information, it appears that this vulnerability could have significant consequences for organizations that rely on libcupsfilters and cups-filters for printing services. Therefore, it is essential that organizations take proactive steps to mitigate this vulnerability and prevent potential denial of service. The N

Technical summary

The PNG image reading function in libcupsfilters and cups-filters creates a libpng reader without installing an error recovery handler. This causes the CUPS image filter process to abort when processing a malformed PNG file, allowing an unauthenticated attacker to submit a specially crafted PNG print job and cause a denial of service of the in-flight print job. Organizations using libcupsfilters and cups-filters should prioritize patching to prevent denial of service attacks via specially crafted PNG print jobs. The vulnerability's impact is primarily related to printing services, and defenders should focus on securing print job submissions.

Defensive priority

Organizations using libcupsfilters and cups-filters should prioritize patching to prevent denial of service attacks via specially crafted PNG print jobs.

Recommended defensive actions

• Apply patches for libcupsfilters and cups-filters
• Restrict access to print job submission to trusted users
• Monitor print job submissions for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record indicates a flaw in libcupsfilters and cups-filters that causes the CUPS image filter process to abort when processing a malformed PNG file. Limited evidence suggests an unauthenticated attacker could exploit this by submitting a specially crafted PNG print job, leading to denial of service of the in-flight print job. Further analysis is needed to fully understand the vulnerability's impact and exploitability.

Official resources