Libevent: Prior to 2.1.13 and 2.2.2-a ...) (CVE-2026-63387)
CVE-2026-63387 is a medium severity vulnerability in the Libevent event notification library affecting multiple stable versions prior to 2.1.13 and 2.2.2-a. The CVSS 3.1 score is 7.0, indicating a network attack vector with high attack complexity and no privileges or user interaction required. The impact includes low confidentiality and integrity loss and high availability impact. The vulnerability affects several Ubuntu LTS versions with specific stable releases listed. No known exploits are reported in the wild and no official patch or remediation details are provided in the available data.
AI Analysis
Technical Summary
Libevent versions prior to 2.1.13 and 2.2.2-a contain a vulnerability identified as CVE-2026-63387. This vulnerability has a CVSS 3.1 base score of 7.0, with an attack vector over the network, high attack complexity, no privileges required, and no user interaction needed. The impact includes limited confidentiality and integrity loss but significant availability impact. The affected versions include multiple stable releases of Libevent used in various Ubuntu LTS distributions from 14.04 through 26.04. There is no information on known exploits or vendor-provided patches in the provided data.
Potential Impact
The vulnerability allows an attacker to impact system availability significantly, with some loss of confidentiality and integrity. The attack can be performed remotely without privileges or user interaction, but requires high attack complexity. No known exploits are currently reported in the wild.
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 communications for updates. No specific mitigations are described in the available data.
Libevent: Prior to 2.1.13 and 2.2.2-a ...) (CVE-2026-63387)
Description
CVE-2026-63387 is a medium severity vulnerability in the Libevent event notification library affecting multiple stable versions prior to 2.1.13 and 2.2.2-a. The CVSS 3.1 score is 7.0, indicating a network attack vector with high attack complexity and no privileges or user interaction required. The impact includes low confidentiality and integrity loss and high availability impact. The vulnerability affects several Ubuntu LTS versions with specific stable releases listed. No known exploits are reported in the wild and no official patch or remediation details are provided in the available data.
CVSS v3.1
Score 7.0high
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 versions prior to 2.1.13 and 2.2.2-a contain a vulnerability identified as CVE-2026-63387. This vulnerability has a CVSS 3.1 base score of 7.0, with an attack vector over the network, high attack complexity, no privileges required, and no user interaction needed. The impact includes limited confidentiality and integrity loss but significant availability impact. The affected versions include multiple stable releases of Libevent used in various Ubuntu LTS distributions from 14.04 through 26.04. There is no information on known exploits or vendor-provided patches in the provided data.
Potential Impact
The vulnerability allows an attacker to impact system availability significantly, with some loss of confidentiality and integrity. The attack can be performed remotely without privileges or user interaction, but requires high attack complexity. No known exploits are currently reported in the wild.
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 communications for updates. No specific mitigations are described in the available data.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-63387
- 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
- 3.1
Threat ID: 6a8c4c52acd9273b499be792
Added to database: 08/24/2026, 13:51:14 UTC
Last enriched: 08/24/2026, 14:06:31 UTC
Last updated: 08/24/2026, 22:52:13 UTC
Views: 3
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