CVE-2026-54778: CoreWCF: UnixDomainSocket Non-Reentrant POSIX Identity Resolution

June 19, 2026

Race condition in POSIX peer identity resolution may attribute one connection’s identity to another (getpwuid/getgrgid non-reentrant) and may crash the host process under contention.

References

github.com/CoreWCF/CoreWCF/security/advisories/GHSA-q6v9-43v5-jv9q
github.com/advisories/GHSA-q6v9-43v5-jv9q
nvd.nist.gov/vuln/detail/CVE-2026-54778

Code Behaviors & Features

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