EUVD-2026-77589
GHSA-q5vg-f923-829p
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Primary rating from Vendor (redhat) · only source for this CVE.
CVSS VectorVendor: redhat
Lifecycle Timeline
1DescriptionCVE.org
A flaw was found in SSSD (System Security Services Daemon). A local attacker with privileges to connect to the PAM (Pluggable Authentication Modules) responder socket can send a specially crafted protocol request. If the pam_app_services configuration is enabled and the service item is omitted from the request, a NULL pointer dereference can occur. This vulnerability leads to a denial of service, causing the PAM responder to crash and disrupt authentication services.
AnalysisAI
A local denial-of-service flaw in SSSD (System Security Services Daemon) lets an attacker who can connect to the PAM responder socket crash the responder by sending a crafted protocol request that omits the service item while the pam_app_services option is enabled, triggering a NULL pointer dereference. Only availability is affected (CVSS 5.5, C:N/I:N/A:H), but a crash of the PAM responder disrupts authentication on the host until the service is restarted. …
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Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Denial Of Service
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External POC / Exploit Code
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