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Echo: linux: security update to 6.1.162-1

medium Tenable Cloud Security Plugin ID 460132

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: ksmbd: Fix race condition in RPC
 handle list access The 'sess->rpc_handle_list' XArray manages RPC handles within a ksmbd session. Access
 to this list is intended to be protected by 'sess->rpc_lock' (an rw_semaphore). However, the locking
 implementation was flawed, leading to potential race conditions. In ksmbd_session_rpc_open(), the code
 incorrectly acquired only a read lock before calling xa_store() and xa_erase(). Since these operations
 modify the XArray structure, a write lock is required to ensure exclusive access and prevent data
 corruption from concurrent modifications. Furthermore, ksmbd_session_rpc_method() accessed the list using
 xa_load() without holding any lock at all. This could lead to reading inconsistent data or a potential
 use-after-free if an entry is concurrently removed and the pointer is dereferenced. Fix these issues by:
 1. Using down_write() and up_write() in ksmbd_session_rpc_open() to ensure exclusive access during XArray
 modification, and ensuring the lock is correctly released on error paths. 2. Adding down_read() and
 up_read() in ksmbd_session_rpc_method() to safely protect the lookup. (CVE-2025-40039)

Solution

Update the linux library and its related packages to version 6.1.162-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-40039

Plugin Details

Severity: Medium

ID: 460132

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.73

CVSS v2

Risk Factor: Low

Base Score: 3.8

Temporal Score: 2.8

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

CVSS Score Source: CVE-2025-40039

CVSS v3

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 4.1

Vector: CVSS:3.0/AV:L/AC:H/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: 10/30/2025

Vulnerability Publication Date: 10/28/2025

Reference Information

CVE: CVE-2025-40039