CVE-2026-127100
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SSSD PAM Responder NULL Pointer Dereference via Malformed OAuth2 Code

Publication date: 2026-11-12

Last updated on: 2026-11-12

Assigner: redhat-SADP

Description
A flaw was found in SSSD's PAM responder on builds with the JSON PAM extension enabled. A local attacker can submit a crafted authentication request containing a non-string OAuth2 code value. Missing JSON type validation leads to a NULL pointer dereference, terminating the PAM responder and disrupting SSSD-backed authentication.

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Meta Information

Published
2026-11-12
Last Modified
2026-11-12
Generated
2026-11-12
EPSS Evaluated
N/A
NVD
CVE-2026-127100
EUVD
EUVD-2026-124600

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.

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