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ALPINE-CVE-2018-16841

ALPINE-CVE-2018-16841 PUBLISHED CVSS 6.5 MEDIUM

Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of service. When configured to accept smart-card authentication, Samba's KDC will call talloc_free() twice on the same memory if the principal in a validly signed certificate does not match the principal in the AS-REQ. This is only possible after authentication with a trusted certificate. talloc is robust against further corruption from a double-free with talloc_free() and directly calls abort(), terminating the KDC process.

Risk Scores

CVSS 3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

VendorProductVersions
Alpine:v3.21samba0, 0, 3.2.10-r0
Alpine:v3.10samba0, 0, 4.8.5-r0
Alpine:v3.22samba0, 0, 3.2.10-r0
Alpine:v3.19samba0, 0, 3.2.10-r0
Alpine:v3.16samba4.2.9-r1, 4.1.17-r0, 4.1.16-r0
Alpine:v3.15samba4.8.5-r0, 4.1.6-r0, 4.1.7-r0
Alpine:v3.12samba4.4.2-r1, 0, 3.2.10-r0
Alpine:v3.18samba3.3.4-r0, 4.1.6-r0, 4.1.7-r0
Alpine:v3.9samba3.3.8-r0, 0, 3.2.10-r0
Alpine:v3.11samba4.7.0-r1, 0, 3.2.10-r0
Alpine:v3.20samba0, 0, 3.2.10-r0
Alpine:v3.23samba4.1.16-r0, 0, 3.2.10-r0
Alpine:v3.14samba3.5.6-r0, 4.8.5-r0, 4.8.4-r1
Alpine:v3.24samba0
Alpine:v3.6samba3.3.5-r0, 4.2.1-r2, 4.2.3-r0
Alpine:v3.17samba4.8.2-r0, 0, 4.8.5-r0
Alpine:v3.13samba4.1.3-r0, 4.1.3-r1, 4.1.4-r0
Alpine:v3.8samba4.6.4-r0, 0, 3.2.10-r0
Alpine:v3.7samba4.6.5-r0, 4.6.6-r0, 4.6.6-r1

Timeline

  • Nov 28, 2018 CVE Published
  • Apr 30, 2026 Distribution Patch
  • Jun 9, 2026 CVE Updated
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