Denial of Service Vulnerability in Poppler's Splash Backend Affects Rendering Applications
CVE-2026-93653

5.5MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
18 September 2026

What is CVE-2026-93653?

A denial of service vulnerability exists in Poppler's Splash backend, which can be exploited by an attacker through the delivery of a specially crafted PDF. When this PDF contains tiling-pattern geometry that approaches the int32 boundary, it can manipulate the SplashOutputDev::tilingPatternFill function to result in an excessive loop in the pattern-fill scanline routine. This loop runs indefinitely without allocating any corresponding memory, which may lead the rendering application to consume 100% of CPU resources for a prolonged period. Consequently, this flaw can severely disrupt the functionality of applications utilizing Poppler for PDF rendering.

References

https://access.redhat.com/security/cve/CVE-2026-93653
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2537005
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Donghai Zhu (School of Computer Science and Technology, Zhejiang Gongshang University) for reporting this issue.
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