Detections
Analytics

Echo: linux: security update to 6.1.137-1

high Tenable Self-Hosted Container Security Plugin ID 462734

Description

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

 - In the Linux kernel, the following vulnerability has been resolved: net_sched: hfsc: Fix a UAF
 vulnerability in class handling This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class
 handling. The issue occurs due to a time-of-check/time-of-use condition in hfsc_change_class() when
 working with certain child qdiscs like netem or codel. The vulnerability works as follows: 1.
 hfsc_change_class() checks if a class has packets (q.qlen != 0) 2. It then calls qdisc_peek_len(), which
 for certain qdiscs (e.g., codel, netem) might drop packets and empty the queue 3. The code continues
 assuming the queue is still non-empty, adding the class to vttree 4. This breaks HFSC scheduler
 assumptions that only non-empty classes are in vttree 5. Later, when the class is destroyed, this can lead
 to a Use-After-Free The fix adds a second queue length check after qdisc_peek_len() to verify the queue
 wasn't emptied. (CVE-2025-37797)

Solution

Update the linux library and its related packages to version 6.1.137-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-37797

Plugin Details

Severity: High

ID: 462734

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.12

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2025-37797

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/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: 9/15/2025

Vulnerability Publication Date: 2/12/2025

Reference Information

CVE: CVE-2025-37797