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Echo: linux: security update to 6.1.159-1

medium Tenable Cloud Security Plugin ID 458738

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: atm/fore200e: Fix possible data race
 in fore200e_open() Protect access to fore200e->available_cell_rate with rate_mtx lock in the error
 handling path of fore200e_open() to prevent a data race. The field fore200e->available_cell_rate is a
 shared resource used to track available bandwidth. It is concurrently accessed by fore200e_open(),
 fore200e_close(), and fore200e_change_qos(). In fore200e_open(), the lock rate_mtx is correctly held when
 subtracting vcc->qos.txtp.max_pcr from available_cell_rate to reserve bandwidth. However, if the
 subsequent call to fore200e_activate_vcin() fails, the function restores the reserved bandwidth by adding
 back to available_cell_rate without holding the lock. This introduces a race condition because
 available_cell_rate is a global device resource shared across all VCCs. If the error path in
 fore200e_open() executes concurrently with operations like fore200e_close() or fore200e_change_qos() on
 other VCCs, a read-modify-write race occurs. Specifically, the error path reads the rate without the lock.
 If another CPU acquires the lock and modifies the rate (e.g., releasing bandwidth in fore200e_close())
 between this read and the subsequent write, the error path will overwrite the concurrent update with a
 stale value. This results in incorrect bandwidth accounting. (CVE-2025-68339)

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-2025-68339

Plugin Details

Severity: Medium

ID: 458738

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.4

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.1

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

CVSS Score Source: CVE-2025-68339

CVSS v3

Risk Factor: Medium

Base Score: 6.3

Temporal Score: 5.5

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/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: 12/23/2025

Vulnerability Publication Date: 12/9/2025

Reference Information

CVE: CVE-2025-68339