CVE-2026-54778

MEDIUM

CoreWCF: UnixDomainSocket Non-Reentrant POSIX Identity Resolution

Title source: cna
STIX 2.1

Description

CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. Prior to 1.8.1 and 1.9.1, CoreWCF UnixDomainSocket POSIX peer identity resolution uses non-reentrant getpwuid and getgrgid calls, allowing concurrent connections to attribute one connection's identity to another or crash the host process under contention. This issue is fixed in versions 1.8.1 and 1.9.1.

References (6)

Core 6

Scores

CVSS v3 6.2
EPSS 0.0010
EPSS Percentile 1.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-362 CWE-825
Status published
Products (2)
CoreWCF/CoreWCF < 1.8.1
CoreWCF/CoreWCF >= 1.9.0, < 1.9.1
Published Jul 08, 2026
Tracked Since Jul 09, 2026