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CVE-2026-6245 Details

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).

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:5.5 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://access.redhat.com/security/cve/CVE-2026-6245 [email protected]Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2457954 [email protected]Issue TrackingVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-805Buffer Access with Incorrect Length Value[email protected]

Affected Products

ProductVersions
fedoraproject sssd
All versions

CPE

  • cpe:2.3:a:fedoraproject:sssd:-:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
redhat openshift container platform
4.0

CPE

  • cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
redhat enterprise linux
6.0
7.0
8.0
9.0
10.0

CPE

  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

7 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-6245
NVD Published Date:
Apr 15, 2026
NVD Last Modified:
Sep 1, 2026
Source:
[email protected]
CVE-2026-6245 Details - Not Deferred