Off-by-One Errors in FreeIPA's OAuth2 Device Authorization Handler Impacting Red Hat
CVE-2026-14612

4.2MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
3 July 2026

What is CVE-2026-14612?

In the FreeIPA ipa-otpd daemon's OAuth2 device authorization handler, two off-by-one errors can lead to out-of-bounds memory access when handling oversized responses from an external OAuth2/OIDC Identity Provider. This situation arises when FreeIPA is configured to interact with an external IdP under attacker control, or if the IdP endpoint is compromised through a man-in-the-middle attack. Exploitation of this vulnerability requires the user to initiate the OAuth2 device authorization process, potentially causing a limited denial of service for the ipa-otpd daemon.

References

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

CVSS V3.1

Score:
4.2
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Andrew Rukin (Arenadata) for reporting this issue.
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