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Echo: linux: security update to 6.1.135-1

medium Tenable Cloud Security Plugin ID 461418

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: skbprio: Remove overly
 strict queue assertions In the current implementation, skbprio enqueue/dequeue contains an assertion that
 fails under certain conditions when SKBPRIO is used as a child qdisc under TBF with specific parameters.
 The failure occurs because TBF sometimes peeks at packets in the child qdisc without actually dequeuing
 them when tokens are unavailable. This peek operation creates a discrepancy between the parent and child
 qdisc queue length counters. When TBF later receives a high-priority packet, SKBPRIO's queue length may
 show a different value than what's reflected in its internal priority queue tracking, triggering the
 assertion. The fix removes this overly strict assertions in SKBPRIO, they are not necessary at all.
 (CVE-2025-38637)

Solution

Update the linux library and its related packages to version 6.1.135-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-38637

Plugin Details

Severity: Medium

ID: 461418

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2025-38637

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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: 4/18/2025

Reference Information

CVE: CVE-2025-38637