Bug 2486561 (CVE-2026-40215)

Summary: CVE-2026-40215 openvpn: OpenVPN: Server crash or memory leak due to race condition and use-after-free
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in OpenVPN that occurs when a connection is being established or updated. A remote attacker could exploit this timing issue to crash the OpenVPN server, causing a temporary service disruption (Denial of Service). In some cases, it could also allow an attacker to view fragments of the server's temporary internal memory, potentially exposing sensitive data.
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2498054, 2498055    
Bug Blocks:    

Description OSIDB Bzimport 2026-06-08 21:01:16 UTC
A race condition in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows remote attackers to potentially cause a server crash or leak heap memory via a use-after-free triggered during TLS session promotion.