Detections
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Echo: glibc: security update to 2.41-12+deb13u3+e2

critical Tenable Cloud Security Plugin ID 459970

Description

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

 - When expanding paths that begin with a tilde (~) followed by a username, the internal parse_tilde function
 extracts the username to determine the user's home directory. The implementation allocates memory for this
 username directly on the stack using the strndupa macro. Because the size of this allocation was
 determined by the length of the user-supplied input without any bounds checks, passing an excessively long
 username e.g. thousands of characters, forces the thread to exhaust its stack space. Thus if an
 application passes untrusted, attacker-controlled input to the wordexp function, an attacker can trigger a
 stack clash. (CVE-2026-6791)

Solution

Update the glibc library and its related packages to version 2.41-12+deb13u3+e2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-6791

Plugin Details

Severity: Critical

ID: 459970

Version: Revision 1.2

Type: Local

Published: 10/2/2026

Updated: 10/5/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.68

CVSS v2

Risk Factor: Medium

Base Score: 5.7

Temporal Score: 4.2

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

CVSS Score Source: CVE-2026-6791

CVSS v3

Risk Factor: Medium

Base Score: 6.6

Temporal Score: 5.8

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9

Threat Score: 6.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:L/SA:H

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 8/10/2026

Vulnerability Publication Date: 8/10/2026

Reference Information

CVE: CVE-2026-6791