HOMEVULNERABILITIESCVE-2026-6245
MEDIUM

CVE-2026-6245

CWE-805Published: April 15, 2026· Updated: Apr 17, 2026

5.5
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:1.0th

Official 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).

NVD Source

Technical Analysis

CVE-2026-6245 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

All References (2)

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

Quick Facts

CVE IDCVE-2026-6245
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-805
CISA KEVNo
EPSS (30d)0.01%
PublishedApr 15, 2026

Related CVEs (CWE-805)

CVE-2026-34002
9.1
CVE-2026-1837
8.7
CVE-2026-1767
8.1
CVE-2025-63547
7.5
CVE-2026-20033
7.4
CVE-2026-20010
7.4

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-6245 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2026-6245·NVD
CVE-2026-6245 — CVSS 5.5 MEDIUM | CTIWATCH.COM