Libevent: Prior to 2.1.13 and 2.2.2-a ...) (CVE-2026-63383)
A vulnerability exists in the libevent event notification library affecting multiple stable versions prior to 2.1.13 and 2.2.2-a. The issue impacts various Ubuntu LTS releases including 14.04 through 26.04. The vulnerability has a medium severity rating based on CVSS 4.0 metrics, indicating a network attack vector with no required privileges or user interaction but with high impact on availability. No known exploits in the wild have been reported. No patch or remediation details are provided in the available data.
AI Analysis
Technical Summary
Libevent, an event notification library, contains a vulnerability affecting versions prior to 2.1.13 and 2.2.2-a, including multiple stable builds used in Ubuntu LTS distributions from 14.04 through 26.04. The CVSS 4.0 vector indicates the vulnerability is remotely exploitable without authentication or user interaction and results in high impact on availability. The specific technical details of the vulnerability are not provided. No known exploits have been reported, and no patch or official remediation information is included in the source data.
Potential Impact
The vulnerability allows an unauthenticated attacker to remotely impact the availability of systems running affected versions of libevent. This could lead to denial of service conditions. There is no indication of impact on confidentiality or integrity. No active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor vendor channels for updates and consider upgrading to libevent versions 2.1.13 or later once available.
Libevent: Prior to 2.1.13 and 2.2.2-a ...) (CVE-2026-63383)
Description
A vulnerability exists in the libevent event notification library affecting multiple stable versions prior to 2.1.13 and 2.2.2-a. The issue impacts various Ubuntu LTS releases including 14.04 through 26.04. The vulnerability has a medium severity rating based on CVSS 4.0 metrics, indicating a network attack vector with no required privileges or user interaction but with high impact on availability. No known exploits in the wild have been reported. No patch or remediation details are provided in the available data.
CVSS v4.0
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
Libevent, an event notification library, contains a vulnerability affecting versions prior to 2.1.13 and 2.2.2-a, including multiple stable builds used in Ubuntu LTS distributions from 14.04 through 26.04. The CVSS 4.0 vector indicates the vulnerability is remotely exploitable without authentication or user interaction and results in high impact on availability. The specific technical details of the vulnerability are not provided. No known exploits have been reported, and no patch or official remediation information is included in the source data.
Potential Impact
The vulnerability allows an unauthenticated attacker to remotely impact the availability of systems running affected versions of libevent. This could lead to denial of service conditions. There is no indication of impact on confidentiality or integrity. No active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor vendor channels for updates and consider upgrading to libevent versions 2.1.13 or later once available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-63383
- Osv Schema Version
- 1.7.0
- Aliases
- []
- 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"]
- Database Specific Severity
- null
- Cvss Version
- 4.0
Threat ID: 6a8c4c54acd9273b499be7d5
Added to database: 08/24/2026, 13:51:16 UTC
Last enriched: 08/24/2026, 14:07:10 UTC
Last updated: 08/24/2026, 22:52:13 UTC
Views: 2
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