CVE-2026-104038

EUVD-2026-92896
A flaw was found in sssd. A remote attacker can cause a denial of service (DoS) by submitting a certificate that lacks an expected Security Identifier (SID) extension. In deployments configured with SID-based certificate mapping rules, the service fails to verify the presence of the extension before processing it, causing the process to crash during authentication or lookup operations.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.9 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 11.75%
Debian logo
Debian Releases
Debian Product
Codename
sssd
bookworm
vulnerable
sid
vulnerable
trixie
vulnerable
Common Weakness Enumeration
References
https://access.redhat.com/security/cve/CVE-2026-104038
https://bugzilla.redhat.com/show_bug.cgi?id=2478980