CVE-2026-14612 (GCVE-0-2026-14612)

Vulnerability from cvelistv5 – Published: 2026-07-03 15:11 – Updated: 2026-07-03 15:11
VLAI
Title
Freeipa: ipa: idm: freeipa: off-by-one buffer overflows in ipa-otpd oauth2.c during oauth2 device authorization
Summary
Two off-by-one errors in the FreeIPA ipa-otpd daemon's OAuth2 device authorization handler can cause out-of-bounds memory access when processing an oversized response from a configured external OAuth2/OIDC Identity Provider. An attacker who controls or can man-in-the-middle the IdP endpoint may be able to trigger ipa-otpd to write or read one byte past the end of a fixed-size buffer. Exploitation requires FreeIPA to be configured with an external IdP, attacker control or MITM of that IdP, and a user to initiate the OAuth2 device authorization flow. The most likely impact is limited denial of service affecting the ipa-otpd daemon.
Severity
4.2 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L
CWE
Assigner
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-14612 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2496879 issue-trackingx_refsource_REDHAT
Impacted products
Date Public
2026-07-03 14:00
Credits
Red Hat would like to thank Andrew Rukin (Arenadata) for reporting this issue.
Show details on NVD website
To clipboard 

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Nomenclature

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