CVE-2026-6245
A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string without explicit termination, it results in an out-of-bounds read when processed by functions like snprintf(). A local attacker could potentially trigger this vulnerability by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash, resulting in a local Denial of Service (DoS).
- Score
- CVSS 3.1 5.5 Medium
- Status
- Analyzed - secalert@redhat.com
- Published
- 2026-04-15
- Last modified
- 2026-10-26
- Weaknesses
- CWE-805
Affected products
- Sssd (Fedoraproject)
- Enterprise Linux (Redhat)
- Openshift (Redhat)
- Openshift Container Platform (Redhat)
References
- https://access.redhat.com/security/cve/CVE-2026-6245
- https://bugzilla.redhat.com/show_bug.cgi?id=2457954
