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Echo: linux: security update to 6.1.170-1

critical Tenable Cloud Security Plugin ID 461020

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/x25: Fix potential double free of
 skb When alloc_skb fails in x25_queue_rx_frame it calls kfree_skb(skb) at line 48 and returns 1 (error).
 This error propagates back through the call chain: x25_queue_rx_frame returns 1 | v x25_state3_machine
 receives the return value 1 and takes the else branch at line 278, setting queued=0 and returning 0 | v
 x25_process_rx_frame returns queued=0 | v x25_backlog_rcv at line 452 sees queued=0 and calls
 kfree_skb(skb) again This would free the same skb twice. Looking at x25_backlog_rcv:
 net/x25/x25_in.c:x25_backlog_rcv() { ... queued = x25_process_rx_frame(sk, skb); ... if (!queued)
 kfree_skb(skb); } (CVE-2026-43011)

Solution

Update the linux library and its related packages to version 6.1.170-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-43011

Plugin Details

Severity: Critical

ID: 461020

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.11

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-43011

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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: 5/2/2026

Vulnerability Publication Date: 4/23/2026

Reference Information

CVE: CVE-2026-43011