CVE record · CVE-2023-5568

Samba: heap buffer overflow with freshness tokens in the heimdal kdc

CVSS 5.9 MediumEPSS 0.021 · 81st percentile

Published by the CVE Program (CNA: redhat) at 24 Oct 2023, 21:56 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 6 Package name: samba https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: unaffected
Red Hat	Red Hat Enterprise Linux 7 Package name: samba https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: unaffected
Red Hat	Red Hat Enterprise Linux 8 Package name: samba https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: unaffected
Red Hat	Red Hat Enterprise Linux 9 Package name: samba https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: unaffected
Red Hat	Red Hat Storage 3 Package name: samba https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected

Identifiers: CVE-2023-5568
CNA: redhat
Weakness (CWE): CWE-122
Tags: Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Red Hat Storage 3
Memory corruption
Published: 24 Oct 2023
Updated: 2 Sept 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.9	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H	CNA (redhat)

CISA KEV Not listed.
EPSS 0.021, the 81st percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 24 Oct 2023. New records show when each source confirmed them.

Sources

References from the CNA

access.redhat.com/security/cve/CVE-2023-5568 vdb-entryredhat
bugzilla.redhat.com/show_bug.cgi?id=2245174 issue-trackingredhat
bugzilla.samba.org/show_bug.cgi?id=15491
www.samba.org/samba/history/samba-4.19.2.html

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.