What’s Vulnerable › Vulnerabilities

CVE-2023-5568: Samba: heap buffer overflow with freshness tokens in the heimdal kdc

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-10-25 · updated 2026-06-17
• Weakness: CWE-122

Description

A heap-based Buffer Overflow flaw was discovered in Samba. It could allow a remote, authenticated attacker to exploit this vulnerability to cause a denial of service.

Affected products

• Samba: before 4.19.2 — fixed in 4.19.2

How to fix

Upgrade to a fixed version: Samba 4.19.2. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/security/cve/CVE-2023-5568
• https://bugzilla.redhat.com/show_bug.cgi?id=2245174
• https://bugzilla.samba.org/show_bug.cgi?id=15491
• https://www.samba.org/samba/history/samba-4.19.2.html
• https://access.redhat.com/security/cve/CVE-2023-5568
• https://bugzilla.redhat.com/show_bug.cgi?id=2245174
• https://bugzilla.samba.org/show_bug.cgi?id=15491
• https://security.netapp.com/advisory/ntap-20231124-0007/
• https://www.samba.org/samba/history/samba-4.19.2.html

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