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CVE-2026-6245

Sssd: out-of-bounds read in the sssd

Published: Apr 15, 2026Updated: Aug 21, 2026 Sources: CVE List NVDCWE-805
5.5MEDIUM
NVD MITRE
EPSS Score
0.1%
Top 96.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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).

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-805

Affected Products

Red Hat
commercial·USaka redhat
openshift container platformOn-prem
Operating Systems / linux-distro
Red Hat Enterprise Linux 10On-premOS
Operating Systems / linux-distro
Red Hat OpenShift Container Platform 4SaaSSaaS Service
Cloud & SaaS / container-orchestration
fedoraproject
oss-project·USaka fedora project
sssdOn-prem
Operating Systems / linux-distro
and 5 more affected products View all →

Exploitability

Official Patch Available
Workaround Available
Is your org exposed to CVE-2026-6245?We can run the check for you — a free external exposure review, no install. Check my exposure

References

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

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