CVE-2026-93653: Unchecked Input for Loop Condition in Red Hat Red Hat Enterprise Linux 10
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.
AI Analysis
Technical Summary
This vulnerability involves unchecked input for a loop condition in Poppler's Splash backend. Specifically, a malicious PDF can trigger SplashOutputDev::tilingPatternFill to compute an attacker-controlled repeat count that causes an excessively long loop without corresponding memory allocation. This results in high CPU consumption during PDF rendering. Red Hat's advisory states that this issue does not impact any supported Red Hat Enterprise Linux 10 versions or other supported products.
Potential Impact
The impact is a denial of service through resource exhaustion (CPU consumption) caused by an unbounded loop during PDF rendering. There is no impact on confidentiality or integrity. The vulnerability requires user interaction (opening a crafted PDF) and local or adjacent access to the vulnerable rendering component. Red Hat confirms no supported products are affected, so the impact on Red Hat customers is currently none.
Mitigation Recommendations
Red Hat has determined that no currently supported Red Hat products are affected by this vulnerability. Therefore, no action is required for Red Hat Enterprise Linux 10 users at this time. Users should monitor the Red Hat advisory for any updates if the assessment changes.
CVE-2026-93653: Unchecked Input for Loop Condition in Red Hat Red Hat Enterprise Linux 10
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.
CVSS v3.1
Score 5.5medium
Affected software
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 6
Red Hat
Red Hat Enterprise Linux 7
Red Hat
Red Hat Enterprise Linux 8
Red Hat
Red Hat Enterprise Linux 9
Red Hat
Red Hat Hardened Images
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves unchecked input for a loop condition in Poppler's Splash backend. Specifically, a malicious PDF can trigger SplashOutputDev::tilingPatternFill to compute an attacker-controlled repeat count that causes an excessively long loop without corresponding memory allocation. This results in high CPU consumption during PDF rendering. Red Hat's advisory states that this issue does not impact any supported Red Hat Enterprise Linux 10 versions or other supported products.
Potential Impact
The impact is a denial of service through resource exhaustion (CPU consumption) caused by an unbounded loop during PDF rendering. There is no impact on confidentiality or integrity. The vulnerability requires user interaction (opening a crafted PDF) and local or adjacent access to the vulnerable rendering component. Red Hat confirms no supported products are affected, so the impact on Red Hat customers is currently none.
Mitigation Recommendations
Red Hat has determined that no currently supported Red Hat products are affected by this vulnerability. Therefore, no action is required for Red Hat Enterprise Linux 10 users at this time. Users should monitor the Red Hat advisory for any updates if the assessment changes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-09-18T13:14:24.766Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-93653","vendor":"Red Hat"}]
Threat ID: 6aad4b7355bf5e2cf51f5ed3
Added to database: 09/18/2026, 14:32:19 UTC
Last enriched: 09/18/2026, 14:47:05 UTC
Last updated: 09/18/2026, 22:12:52 UTC
Views: 9
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