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Echo: linux: security update to 6.12.20-1

medium Tenable Self-Hosted Container Security Plugin ID 459066

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: mctp: unshare packets when
 reassembling Ensure that the frag_list used for reassembly isn't shared with other packets. This avoids
 incorrect reassembly when packets are cloned, and prevents a memory leak due to circular references
 between fragments and their skb_shared_info. The upcoming MCTP-over-USB driver uses skb_clone which can
 trigger the problem - other MCTP drivers don't share SKBs. A kunit test is added to reproduce the issue.
 (CVE-2025-21972)

Solution

Update the linux library and its related packages to version 6.12.20-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-21972

Plugin Details

Severity: Medium

ID: 459066

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-2025-21972

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: 4/1/2025

Reference Information

CVE: CVE-2025-21972