Out-of-bounds Read Affecting samba package, versions <2:4.24.5+dfsg-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.52% (42nd percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-SAMBA-18384658
  • published29 Jul 2026
  • disclosed30 Jul 2026

Introduced: 29 Jul 2026

NewCVE-2026-58216  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Debian:unstable samba to version 2:4.24.5+dfsg-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream samba package and not the samba package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

An out-of-bounds read flaw was found in Samba's Kerberos Key Distribution Center's (KDC) password change (kpasswd) service. When processing malformed ASN.1-encoded Kerberos password change request, Samba server miscalculates the structure size and attempts to read up to six bytes beyond the end of the allocated buffer. While this out-of-bounds read typically results in a harmless decryption failure, if the read hits unmapped memory, it causes the KDC process to crash. An authenticated attacker can send a specially crafted kpasswd request containing malformed ASN.1 data to trigger the out-of-bounds read, which may cause the KDC process to terminate, resulting in a denial of service.

CVSS Base Scores

version 3.1