Google: sys-kernel/csql-kernel-6_1, sys-kernel/csql-kernel-6_6: security update to 18613.263.49

medium Tenable Cloud Security Plugin ID 465801

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: xenbus: Use kref to track req lifetime
Marek reported seeing a NULL pointer fault in the xenbus_thread callstack: BUG: kernel NULL pointer
dereference, address: 0000000000000000 RIP: e030:__wake_up_common+0x4c/0x180 Call Trace: <TASK>
__wake_up_common_lock+0x82/0xd0 process_msg+0x18e/0x2f0 xenbus_thread+0x165/0x1c0 process_msg+0x18e is
req->cb(req). req->cb is set to xs_wake_up(), a thin wrapper around wake_up(), or
xenbus_dev_queue_reply(). It seems like it was xs_wake_up() in this case. It seems like req may have woken
up the xs_wait_for_reply(), which kfree()ed the req. When xenbus_thread resumes, it faults on the zero-ed
data. Linux Device Drivers 2nd edition states: "Normally, a wake_up call can cause an immediate reschedule
to happen, meaning that other processes might run before wake_up returns." ... which would match the
behaviour observed. Change to keeping two krefs on each request. One for the caller, and one for
xenbus_thread. Each will kref_put() when finished, and the last will free it. This use of kref matches the
description in Documentation/core-api/kref.rst (CVE-2025-37949)

Solution

Update the sys-kernel/csql-kernel-6_1 library and its related packages to version 18613.263.49 or later.

Plugin Details

Severity: Medium

ID: 465801

Version: Revision 1.2

Type: Local

Family: Google COS Security Checks

Published: 10/2/2026

Updated: 10/3/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

Vendor

Vendor Severity: LOW

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-2025-37949

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

Vulnerability Publication Date: 5/20/2025

Reference Information

CVE: CVE-2025-37949

Detections

Analytics