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Echo: linux: security update to 6.1.187-1

medium Tenable Cloud Security Plugin ID 459300

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: can: j1939: implement
 NETDEV_UNREGISTER notification handler syzbot is reporting unregister_netdevice: waiting for vcan0 to
 become free. Usage count = 2 problem, for j1939 protocol did not have NETDEV_UNREGISTER notification
 handler for undoing changes made by j1939_sk_bind(). Commit 25fe97cb7620 ("can: j1939: move
 j1939_priv_put() into sk_destruct callback") expects that a call to j1939_priv_put() can be
 unconditionally delayed until j1939_sk_sock_destruct() is called. But we need to call j1939_priv_put()
 against an extra ref held by j1939_sk_bind() call (as a part of undoing changes made by j1939_sk_bind())
 as soon as NETDEV_UNREGISTER notification fires (i.e. before j1939_sk_sock_destruct() is called via
 j1939_sk_release()). Otherwise, the extra ref on "struct j1939_priv" held by j1939_sk_bind() call prevents
 "struct net_device" from dropping the usage count to 1; making it impossible for unregister_netdevice() to
 continue. [mkl: remove space in front of label] (CVE-2025-39925)

Solution

Update the linux library and its related packages to version 6.1.187-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-39925

Plugin Details

Severity: Medium

ID: 459300

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.36

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-2025-39925

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: 10/2/2025

Vulnerability Publication Date: 10/1/2025

Reference Information

CVE: CVE-2025-39925