Ubuntu USN-8861-1 Fixes OpenSSL Vulnerabilities
Tech GuruQuick Answer
The authority published USN-8861-1 for OpenSSL vulnerabilities on Ubuntu 26.04 LTS (resolute). Several security issues were fixed in OpenSSL. After a standard system update you need to reboot your computer to make all the necessary changes. Affected deployments should be matched to the authority's exact scope and moved to the supported fixed release.
Confirm Scope And Apply The Supported Fix
What to do now: Inventory OpenSSL vulnerabilities on Ubuntu 26.04 LTS (resolute), match the exact affected release or feature, apply the authority-supported fixed build or service remediation, validate the dependent workflow, and preserve evidence.
Last verified: 2026-10-01 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | OpenSSL vulnerabilities on Ubuntu 26.04 LTS (resolute) |
|---|---|
| Advisory | USN-8861-1 |
| CVEs | CVE-2026-42772, CVE-2026-54873 |
| Authoritative release date | 2026-10-01 12:02:00.813908 UTC |
| Authority revision date | No separate material revision date is stated by Ubuntu; verified against the first-party notice API. |
| Affected versions | The Ubuntu releases and source packages enumerated in USN-8861-1: Ubuntu 26.04 LTS (resolute). |
| Fixed version | resolute: openssl 3.5.5-1ubuntu3.7 |
| CVSS base score | Not provided by the authority |
| CVSS severity | Not provided by the authority |
| Exploitation status | Not stated by the authority; no exploitation claim is inferred. |
What Changed
Several security issues were fixed in OpenSSL. After a standard system update you need to reboot your computer to make all the necessary changes.
What To Validate Now
- Inventory. Locate OpenSSL vulnerabilities on Ubuntu 26.04 LTS (resolute) deployments, versions, enabled features, exposure paths, owners, and dependent services.
- Establish applicability. Compare installed source packages and Ubuntu releases with USN-8861-1. Do not infer scope for another release, an upstream build, or a similarly named binary package.
- Remediate. Install the notice's exact fixed source-package build through the supported Ubuntu security or ESM channel for the matching release, following current Ubuntu instructions and change control.
- Validate. Confirm the resulting source-package version, restart or reload affected services when Ubuntu tooling requires it, exercise representative workflows and recovery paths, monitor for regressions, and document exceptions.
- 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
Some listed fixes are delivered through Ubuntu Pro or ESM. Confirm entitlement and repository state, use the exact supported release stream, and test dependencies and rollback. Severity alone is not evidence of exploitation.
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.
