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Echo: linux: security update to 6.1.159-1

medium Tenable Cloud Security Plugin ID 459911

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: netpoll: fix incorrect refcount
 handling causing incorrect cleanup commit efa95b01da18 ("netpoll: fix use after free") incorrectly ignored
 the refcount and prematurely set dev->npinfo to NULL during netpoll cleanup, leading to improper behavior
 and memory leaks. Scenario causing lack of proper cleanup: 1) A netpoll is associated with a NIC (e.g.,
 eth0) and netdev->npinfo is allocated, and refcnt = 1 - Keep in mind that npinfo is shared among all
 netpoll instances. In this case, there is just one. 2) Another netpoll is also associated with the same
 NIC and npinfo->refcnt += 1. - Now dev->npinfo->refcnt = 2; - There is just one npinfo associated to the
 netdev. 3) When the first netpolls goes to clean up: - The first cleanup succeeds and clears
 np->dev->npinfo, ignoring refcnt. - It basically calls `RCU_INIT_POINTER(np->dev->npinfo, NULL);` - Set
 dev->npinfo = NULL, without proper cleanup - No ->ndo_netpoll_cleanup() is either called 4) Now the second
 target tries to clean up - The second cleanup fails because np->dev->npinfo is already NULL. * In this
 case, ops->ndo_netpoll_cleanup() was never called, and the skb pool is not cleaned as well (for the second
 netpoll instance) - This leaks npinfo and skbpool skbs, which is clearly reported by kmemleak. Revert
 commit efa95b01da18 ("netpoll: fix use after free") and adds clarifying comments emphasizing that npinfo
 cleanup should only happen once the refcount reaches zero, ensuring stable and correct netpoll behavior.
 (CVE-2025-68245)

Solution

Update the linux library and its related packages to version 6.1.159-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-68245

Plugin Details

Severity: Medium

ID: 459911

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 51.46

CVSS v2

Risk Factor: Medium

Base Score: 5.2

Temporal Score: 3.8

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

CVSS Score Source: CVE-2025-68245

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/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: 12/17/2025

Vulnerability Publication Date: 12/9/2025

Reference Information

CVE: CVE-2025-68245