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Echo: linux: security update to 6.1.176-1

medium Tenable Self-Hosted Container Security Plugin ID 463226

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: openvswitch: vport: fix self-deadlock
 on release of tunnel ports vports are used concurrently and protected by RCU, so netdev_put() must happen
 after the RCU grace period. So, either in an RCU call or after the synchronize_net(). The
 rtnl_delete_link() must happen under RTNL and so can't be executed in RCU context. Calling
 synchronize_net() while holding RTNL is not a good idea for performance and system stability under load in
 general, so calling netdev_put() in RCU call is the right solution here. However, when the device is
 deleted, rtnl_unlock() will call netdev_run_todo() and block until all the references are gone. In the
 current code this means that we never reach the call_rcu() and the vport is never freed and the reference
 is never released, causing a self-deadlock on device removal. Fix that by moving the rcu_call() before the
 rtnl_unlock(), so the scheduled RCU callback will be executed when synchronize_net() is called from the
 rtnl_unlock()->netdev_run_todo() while the RTNL itself is already released. (CVE-2026-46165)

Solution

Update the linux library and its related packages to version 6.1.176-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-46165

Plugin Details

Severity: Medium

ID: 463226

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.75

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-2026-46165

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: 5/28/2026

Vulnerability Publication Date: 5/26/2026

Reference Information

CVE: CVE-2026-46165