Detections
Analytics

Echo: bind9: security update to 1:9.20.23-1~deb13u1

critical Tenable Cloud Security Plugin ID 463835

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - A use-after-free vulnerability exists within the DNS-over-HTTPS implementation. This issue affects BIND 9
 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1. BIND 9 versions
 9.18.0 through 9.18.48 and 9.18.11-S1 through 9.18.48-S1 are NOT affected. (CVE-2026-3593)

Solution

Update the bind9 library and its related packages to version 1:9.20.23-1~deb13u1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-3593

Plugin Details

Severity: Critical

ID: 463835

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.56

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-3593

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/21/2026

Vulnerability Publication Date: 5/20/2026

Reference Information

CVE: CVE-2026-3593

IAVA: 2026-A-0498-S