Ubuntu USN-8950-1 Fixes Poppler PDF Denial of Service
Tech GuruQuick Answer
Ubuntu USN-8950-1 fixes CVE-2026-107705 in Poppler on Ubuntu 22.04 LTS through 26.10. Install the release-specific package, restart dependent services when required, test representative encrypted PDF workflows, and retain update and validation evidence.
Confirm Scope And Apply The Supported Remediation
What to do now: Inventory Ubuntu Poppler libraries, utilities, PDF-processing services, versions, exposure paths, and owners; install the USN-listed package; restart long-running consumers as appropriate; test encrypted and representative PDF workflows; monitor crashes; and retain evidence.
Last verified: 2026-10-22 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | Poppler PDF rendering packages on Ubuntu 22.04 LTS, 24.04 LTS, 26.04 LTS, and 26.10 |
|---|---|
| Advisory | USN-8950-1 |
| CVE | CVE-2026-107705 |
| Authoritative release date | 2026-10-21 16:53:02.561101 UTC |
| Authority revision date | 2026-10-21 16:53:02.561101 UTC |
| Affected versions | The listed Ubuntu releases with Poppler packages older than the advisory-specific fixed builds; exposure requires processing a specially crafted encrypted PDF. |
| Fixed version | jammy: poppler 22.02.0-2ubuntu0.15; noble: poppler 24.02.0-1ubuntu9.11; resolute: poppler 26.01.0-2ubuntu0.3; stonking: poppler 26.07.0-2ubuntu1.1 |
| CVSS base score | Not provided by the authority |
| CVSS severity | Not provided by the authority |
| Exploitation status | Ubuntu does not state that this issue is being maliciously exploited.; no exploitation claim is inferred. |
What Changed
Ubuntu fixed CVE-2026-107705, where Poppler mishandles the password-length limit while decrypting a crafted PDF and can crash, causing denial of service.
What To Validate Now
- Inventory. Identify Poppler PDF rendering packages on Ubuntu 22.04 LTS, 24.04 LTS, 26.04 LTS, and 26.10, exact Ubuntu release and package version, workload or service dependencies, exposure, owner, and maintenance constraints.
- Establish applicability. Match each host to USN-8950-1 and its release-specific package scope. The listed Ubuntu releases with Poppler packages older than the advisory-specific fixed builds; exposure requires processing a specially crafted encrypted PDF. Do not infer applicability from the package family alone.
- Remediate. Install the advisory-listed package through the supported Ubuntu or Ubuntu Pro channel, then restart or reload dependent services when required by normal operations.
- Validate. Confirm the installed package version and active process state, exercise representative dependent workflows, monitor for regressions, and retain package, change, restart, and validation evidence.
- Retain evidence. Preserve asset and owner identifiers, the applicability decision, before-and-after versions, change approval, installation output, validation results, and any exception or rollback record.
Operational Cautions
The impact described by Ubuntu is denial of service when a crafted encrypted PDF is opened. Poppler may be embedded in document processors and services, so package inventory alone may not identify every long-running consumer that needs restart or validation.
Evidence To Retain
- Exact product, release stream, package or application version, enabled feature, environment, and accountable owner.
- UTC timestamps, authority revision, approved change record, installer or package-manager output, and resulting version.
- Relevant logs and monitoring evidence, test results, exceptions, compensating controls, and rollback decisions.
Related TechGeeks Resources
Authoritative References
Correction policy: If the authority changes affected versions, fixed versions, severity, exploitation information, mitigations, or required action, TechGeeks will update this notice and its verification date.
