CVE-2026-6245
MEDIUM EPSS 3.8%
Published Apr 15, 20262mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Published Apr 15, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago
Description
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).
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High
Threat Intelligence
EPSS Exploit Probability
3.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-805
References 2
- access.redhat.com https://access.redhat.com/security/cve/CVE-2026-6245
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2457954
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.