CVE-2026-93653 Denial of service in Red Hat Enterprise Linux 10
A crafted PDF can cause Poppler's Splash backend to enter an unbounded CPU loop, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-93653?
CVE-2026-93653 is a medium-severity denial of service vulnerability in Red Hat Enterprise Linux 10, published on 18 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
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.
Weakness: CWE-606
Which versions are affected by CVE-2026-93653?
How do I fix CVE-2026-93653?
No fix has been published for CVE-2026-93653 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-93653 being exploited?
There is no known exploitation of CVE-2026-93653 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-93653, ECHO-dbb5-4d25-3409, GHSA-84rg-5qf5-cx44, UBUNTU-CVE-2026-93653.