Out-of-Bounds Read Vulnerability in System Security Services Daemon by Red Hat
CVE-2026-6245

5.5MEDIUM

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:
15 April 2026

What is CVE-2026-6245?

A vulnerability exists in the System Security Services Daemon (SSSD) where the pam_passkey_child_read_data() function mishandles raw bytes from a pipe. This flaw treats the incoming data as a NUL-terminated C string without proper termination, leading to an out-of-bounds read when processed by functions such as snprintf(). A local attacker could initiate a specially crafted passkey authentication request to exploit this issue, potentially leading to a crash of the SSSD PAM responder and resulting in a local Denial of Service (DoS).

References

https://access.redhat.com/security/cve/CVE-2026-6245
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2457954
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.