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Echo: linux: security update to 6.12.16-1

medium Tenable Self-Hosted Container Security Plugin ID 457262

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: ipv6: fix dst ref loops in rpl,
 seg6 and ioam6 lwtunnels Some lwtunnels have a dst cache for post-transformation dst. If the packet
 destination did not change we may end up recording a reference to the lwtunnel in its own cache, and the
 lwtunnel state will never be freed. Discovered by the ioam6.sh test, kmemleak was recently fixed to catch
 per-cpu memory leaks. I'm not sure if rpl and seg6 can actually hit this, but in principle I don't see why
 not. (CVE-2025-21768)

Solution

Update the linux library and its related packages to version 6.12.16-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-21768

Plugin Details

Severity: Medium

ID: 457262

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-2025-21768

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: 2/27/2025

Reference Information

CVE: CVE-2025-21768