Google: sys-kernel/csql-kernel-6_6, sys-kernel/lakitu-kernel-6_6, sys-kernel/lakitu-nc-kernel-6_6, sys-kernel/lakitu-vgpu-kernel-6_6: security update to 18867.584.3

critical Tenable Self-Hosted Container Security Plugin ID 467799

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: ipv6: mcast: Fix potential UAF in MLD
delayed work A race condition exists between device teardown and incoming MLD query processing, leading to
a Use-After-Free in the MLD delayed work. During device destruction, the primary reference to inet6_dev is
dropped, which can drop its refcount to 0. The actual freeing of inet6_dev memory is deferred via RCU.
Concurrently, the packet receive path runs under RCU read lock and obtains the inet6_dev pointer. Because
the memory is RCU-protected, CPU-0 can safely dereference inet6_dev even if its refcount has hit 0.
However, if CPU-0 calls igmp6_event_query() and schedules delayed work, it attempts to acquire a reference
using in6_dev_hold(). This increments the refcount from 0 to 1, triggering a "refcount_t: addition on 0"
warning. Since the inet6_dev memory is still scheduled to be freed after the RCU grace period, the device
is freed while the work is still scheduled. When the work runs, it accesses the freed memory, causing a
kernel panic. Fix this by using refcount_inc_not_zero() (via a new helper in6_dev_hold_safe()) to prevent
acquiring a reference if the device is already being destroyed. If the refcount is 0, we do not schedule
the work. (CVE-2026-72322)

Solution

Update the sys-kernel/csql-kernel-6_6 library and its related packages to version 18867.584.3 or later.

Plugin Details

Severity: Critical

ID: 467799

Version: Revision 1.3

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/3/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.17

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-72322

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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: 8/11/2026

Reference Information

CVE: CVE-2026-72322

Detections

Analytics