Red Hat Security Advisory: OpenShift Container Platform 4.22.17 bug fix and security update
Description
Multiple vulnerabilities were identified in libevent versions prior to 2.1.13 and 2.2.2-a affecting various Ubuntu LTS releases from 14.04 through 26.04. These include use-after-free issues leading to denial of service or arbitrary code execution, HTTP request smuggling, out-of-bounds reads, resource exhaustion, and inconsistent HTTP message interpretation that could bypass security restrictions. Fixes have been released and are available through standard system updates or Ubuntu Pro for extended support versions.
Affected software
pkg:deb/ubuntu/libevent?arch=source&distro=trustypkg:deb/ubuntu/libevent?arch=source&distro=xenialpkg:deb/ubuntu/libevent?arch=source&distro=bionicpkg:deb/ubuntu/libevent?arch=source&distro=focalpkg:deb/ubuntu/libevent?arch=source&distro=jammypkg:deb/ubuntu/libevent?arch=source&distro=noblepkg:deb/ubuntu/libevent?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Several security issues were discovered in libevent affecting Ubuntu LTS releases 14.04 through 26.04. Vulnerabilities include use-after-free conditions that may cause denial of service or arbitrary code execution (CVE-2026-63381), HTTP request smuggling due to incorrect HTTP request handling (CVE-2026-63382), out-of-bounds reads triggered by malformed tagged RPC data (CVE-2026-63383), resource exhaustion from large payload lengths in tagged RPC data (CVE-2026-63384), and inconsistent HTTP message interpretation that could bypass security restrictions (CVE-2026-63385). These issues affect multiple stable versions of libevent, and patches have been released by Ubuntu and Red Hat to address these vulnerabilities.
Potential Impact
The vulnerabilities can lead to denial of service, arbitrary code execution, HTTP request smuggling, resource exhaustion, and security bypasses in affected systems running vulnerable libevent versions on Ubuntu LTS releases. These impacts could affect the stability and security of applications relying on libevent for event notification and HTTP handling.
Mitigation Recommendations
A fix is available and has been released through standard system updates for affected Ubuntu LTS versions. Users should apply the updates provided by their distribution or use Ubuntu Pro for extended support versions to remediate these vulnerabilities. No additional mitigation steps are required beyond applying the official patches.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-63385
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:14.04:LTS","Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.04:LTS"]
- Cvss Version
- 4.0
Threat ID: 6a8c4c52acd9273b499be794
Added to database: 08/24/2026, 13:51:14 UTC
Last enriched: 10/06/2026, 21:58:58 UTC
Last updated: 10/08/2026, 18:48:47 UTC
Views: 78
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