Google: sys-kernel/csql-kernel-6_6, sys-kernel/tpusev-kernel-6_6: security update to 18613.439.65

medium Tenable Cloud Security Plugin ID 467089

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: vsock: fix lock inversion in
vsock_assign_transport() Syzbot reported a potential lock inversion deadlock between vsock_register_mutex
and sk_lock-AF_VSOCK when vsock_linger() is called. The issue was introduced by commit 687aa0c5581b
("vsock: Fix transport_* TOCTOU") which added vsock_register_mutex locking in vsock_assign_transport()
around the transport->release() call, that can call vsock_linger(). vsock_assign_transport() can be called
with sk_lock held. vsock_linger() calls sk_wait_event() that temporarily releases and re-acquires sk_lock.
During this window, if another thread hold vsock_register_mutex while trying to acquire sk_lock, a
circular dependency is created. Fix this by releasing vsock_register_mutex before calling
transport->release() and vsock_deassign_transport(). This is safe because we don't need to hold
vsock_register_mutex while releasing the old transport, and we ensure the new transport won't disappear by
obtaining a module reference first via try_module_get(). (CVE-2025-40231)

Solution

Update the sys-kernel/csql-kernel-6_6 library and its related packages to version 18613.439.65 or later.

Plugin Details

Severity: Medium

ID: 467089

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.42

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-2025-40231

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: 12/4/2025

Reference Information

CVE: CVE-2025-40231

Detections

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