CVE-2026-104039

Sssd: sssd: denial of service via stale connection state reuse in pam gssapi responder

CVSS 3.1 4.7 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-104039

Published

A flaw was found in SSSD. A local user can cause a denial of service (DoS) by disrupting system authentication services. When handling Generic Security Services Application Programming Interface (GSSAPI) authentication in the Pluggable Authentication Module (PAM) responder, cached connection state is freed upon completion without clearing the reference pointer. An attacker can exploit this by sending an additional request over the same connection, causing the service to access invalid memory and unexpectedly terminate.

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Affected versions, risk and source history

Exploitation and risk

Source status

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Risk history

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Advisory history

3 saved versions

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5 Nov 2026 16:36:21 UTC