# CVE-2026-93653: Poppler: poppler: unbounded cpu loop in splashoutputdev::tilingpatternfill via unvalidated tiling-pattern repeat count (denial of service)

Status: published. Published: 2026-09-18. Updated: 2026-11-06.

A denial of service flaw was found in Poppler's Splash backend. A crafted PDF with tiling-pattern geometry approaching the int32 boundary can cause SplashOutputDev::tilingPatternFill to compute an attacker-controlled repeat count that drives an excessively long loop in the pattern-fill scanline routine, without a corresponding memory allocation. An attacker could exploit this by supplying a malicious PDF to an application that renders it via Poppler's Splash backend, causing the rendering process to consume 100% CPU for an attacker-controlled, extended duration.

## Remediation

- workaround: To mitigate this issue, avoid opening or processing untrusted PDF files with applications that rely on Poppler's Splash backend. This operational control reduces the risk of an attacker triggering the denial of service vulnerability. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Enterprise Linux 10 (poppler): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (poppler): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (compat-poppler022): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (poppler): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (poppler): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (poppler): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Hardened Images (poppler): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 5.5 (medium); CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.15% as of 2026-11-05; percentile 4.25%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-606

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/security/cve/CVE-2026-93653 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2537005 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-93653; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-93653; retrieved 2026-11-06; source updated Not reported

Revision: 6af1c11ee4706b2c747fb7fff6148a773c18b1edb5c7a15dc35f13c00ff21453

Canonical: https://y2.dev/cve/CVE-2026-93653

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