Vulnerability · Published Sep 18, 2026 · Assigned by redhat
CVE-2026-93653Poppler: poppler: unbounded cpu loop in splashoutputdev::tilingpatternfill via unvalidated tiling-pattern repeat count (denial of service)
Medium 5.5
In plain English
A medium-severity security flaw in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 4% of all known vulnerabilities).
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | poppler | no fix listed | DEBIAN-CVE-2026-93653 |
| Debian:13 | poppler | no fix listed | DEBIAN-CVE-2026-93653 |
| Debian:14 | poppler | no fix listed | DEBIAN-CVE-2026-93653 |
| Ubuntu:22.04:LTS | poppler | no fix listed | UBUNTU-CVE-2026-93653 |
| Ubuntu:24.04:LTS | poppler | no fix listed | UBUNTU-CVE-2026-93653 |
| Ubuntu:26.04:LTS | poppler | no fix listed | UBUNTU-CVE-2026-93653 |
| Ubuntu:26.10 | poppler | no fix listed | UBUNTU-CVE-2026-93653 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat Hardened Images | see references |
Weakness: CWE-606 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
- https://access.redhat.com/security/cve/CVE-2026-93653 vdb-entry, x_refsource_REDHAT
- RHBZ#2537005 issue-tracking, x_refsource_REDHAT