Detections
Analytics

Echo: glibc: security update to 2.41-12+deb13u2+e2

high Tenable Cloud Security Plugin ID 463255

Description

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

 - Calling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library's DNS
 backend in the GNU C Library version 2.34 to version 2.43 could, with a crafted response from the
 configured DNS server, result in a violation of the DNS specification that causes the application to treat
 a non-answer section of the DNS response as a valid answer. (CVE-2026-4437)

Solution

Update the glibc library and its related packages to version 2.41-12+deb13u2+e2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-4437

Plugin Details

Severity: High

ID: 463255

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.73

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

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

CVSS Score Source: CVE-2026-4437

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/21/2026

Vulnerability Publication Date: 2/5/2026

Reference Information

CVE: CVE-2026-4437

IAVA: 2026-A-0102-S