Ubuntu USN-8827-1 Fixes Erlang Vulnerabilities
Tech GuruQuick Answer
USN-8827-1 updates Erlang across the listed Ubuntu releases and requires a reboot. The current notice lists more issues than the earlier snapshot, including additional URI, SNMP, and LDAP resource-exhaustion cases. Match the packages and features actually used by each Erlang application.
Confirm Scope And Apply The Supported Fix
Next step: Inventory Erlang applications, enabled services, and installed binary packages. Use Canonical's release-specific table, arrange application maintenance and recovery, and complete the documented reboot after updating.
Last verified: 2026-09-28 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | Erlang vulnerabilities on Ubuntu 26.04 LTS (resolute), Ubuntu 24.04 LTS (noble), Ubuntu 22.04 LTS (jammy), Ubuntu 20.04 ESM (focal), Ubuntu 18.04 ESM (bionic), Ubuntu 16.04 ESM (xenial), Ubuntu 14.04 ESM (trusty) |
|---|---|
| Advisory | USN-8827-1 |
| CVEs | CVE-2026-23941, CVE-2026-42792, CVE-2026-54890, CVE-2026-55737, CVE-2026-55951, CVE-2026-55953, CVE-2026-58227, CVE-2026-59250, CVE-2026-59251, CVE-2026-66357, CVE-2026-66835, CVE-2026-69664, CVE-2026-70399, CVE-2026-71380, CVE-2026-73270, CVE-2026-73276, CVE-2026-73812, CVE-2026-74835, CVE-2026-75538; additionally listed in the current notice: CVE-2026-59696, CVE-2026-70405, CVE-2026-70409 (checked 2026-10-02). |
| Authoritative release date | 2026-09-28 13:21:58.646589 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-8827-1: Ubuntu 26.04 LTS (resolute), Ubuntu 24.04 LTS (noble), Ubuntu 22.04 LTS (jammy), Ubuntu 20.04 ESM (focal), Ubuntu 18.04 ESM (bionic), Ubuntu 16.04 ESM (xenial), Ubuntu 14.04 ESM (trusty). |
| Fixed version | bionic: erlang 1:20.2.2+dfsg-1ubuntu2+esm3 / focal: erlang 1:22.2.7+dfsg-1ubuntu0.5+esm2 / jammy: erlang 1:24.2.1+dfsg-1ubuntu0.7 / noble: erlang 1:25.3.2.8+dfsg-1ubuntu4.7 / resolute: erlang 1:27.3.4.6+dfsg-1ubuntu0.1 / trusty: erlang 1:16.b.3-dfsg-1ubuntu2.2+esm2 / xenial: erlang 1:18.3-dfsg-1ubuntu3.1+esm3 |
| 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
The advisory spans parsers, network protocols, certificate handling, and other runtime components. Some flaws require particular services or crafted input. A long CVE list does not establish that every Erlang application exposes all of them, and restarting one worker does not replace the notice's reboot requirement.
What To Validate Now
- Inventory. Record the Ubuntu release, enabled repositories, installed binary packages (including the installed erlang runtime and component packages), running consumers, and service owner. Check bundled application copies and container images separately.
- Establish applicability. Compare installed binary packages with USN-8827-1's release-specific package table. The source-package builds summarized above identify the advisory's source release; they are not literal package-install commands.
- Remediate. Follow Canonical's current update instructions for the affected binary packages on this Ubuntu release. Confirm security or Pro/ESM repository access as applicable. Do not install a source-package name merely because it appears in the summary table.
- Validate. After reboot, verify the runtime used by each application, cluster membership where applicable, TLS and authentication behavior, and the protocols your workloads enable. Check queues, resource trends, and rejected inputs with safe fixtures rather than running denial-of-service tests against a live service.
- 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 before the change, use the exact supported release stream, and test dependent services, clusters, 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.
