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Echo: glibc: security update to 2.41-12+deb13u4+e2

medium Tenable Cloud Security Plugin ID 464285

Description

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

 - The nscd service in the GNU C Library 2.3.4 onwards may crash due to a stack overflow when a malicious DNS
 server returns too large a response for a DNS query, resulting in degraded DNS resolution for the system.
 Exploitation of this bug needs a system that has nscd enabled and using an untrusted DNS server for name
 resolution, with the compromised DNS server being capable of processing records large enough to result in
 a stack overflow in an nscd thread stack. During experimentation, bind 9 was unable to handle large
 records, but that could change in future or with a different name server. In typical installations, nscd
 is executed in an isolated context as its own user without a shell, due to which any compromise of that
 service is isolated. There is a remote possibility of nscd cache corruption if an attacker manages to get
 the stack pointer into a desired point in the heap, potentially resulting in other caches in nscd being
 overwritten with corrupt data through the stack overflow, until the buggy code path eventually results in
 a crash. Finally, a crash in nscd may result in performance degradation when resolving names, but it does
 not result in a denial of service. (CVE-2026-89092)

Solution

Update the glibc library and its related packages to version 2.41-12+deb13u4+e2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-89092

Plugin Details

Severity: Medium

ID: 464285

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 2.1

Percentile: 8.03

CVSS v2

Risk Factor: Low

Base Score: 3.2

Temporal Score: 2.4

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

CVSS Score Source: CVE-2026-89092

CVSS v3

Risk Factor: Medium

Base Score: 4.2

Temporal Score: 3.7

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/11/2026

Vulnerability Publication Date: 9/11/2026

Reference Information

CVE: CVE-2026-89092