Google: sys-kernel/csql-kernel-6_1, sys-kernel/lakitu-kernel-5_15: security update to 17800.436.106

high Tenable Cloud Security Plugin ID 454468

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: vlan: enforce underlying device type
Currently, VLAN devices can be created on top of non-ethernet devices. Besides the fact that it doesn't
make much sense, this also causes a bug which leaks the address of a kernel function to usermode. When
creating a VLAN device, we initialize GARP (garp_init_applicant) and MRP (mrp_init_applicant) for the
underlying device. As part of the initialization process, we add the multicast address of each applicant
to the underlying device, by calling dev_mc_add. __dev_mc_add uses dev->addr_len to determine the length
of the new multicast address. This causes an out-of-bounds read if dev->addr_len is greater than 6, since
the multicast addresses provided by GARP and MRP are only 6 bytes long. This behaviour can be reproduced
using the following commands: ip tunnel add gretest mode ip6gre local ::1 remote ::2 dev lo ip l set up
dev gretest ip link add link gretest name vlantest type vlan id 100 Then, the following command will
display the address of garp_pdu_rcv: ip maddr show | grep 01:80:c2:00:00:21 Fix the bug by enforcing the
type of the underlying device during VLAN device initialization. (CVE-2025-21920)

Solution

Update the sys-kernel/csql-kernel-6_1 library and its related packages to version 17800.436.106 or later.

Plugin Details

Severity: High

ID: 454468

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/1/2026

Updated: 10/1/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.04

Vendor

Vendor Severity: HIGH

CVSS v2

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 4.6

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

CVSS Score Source: CVE-2025-21920

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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: 3/20/2025

Reference Information

CVE: CVE-2025-21920

Detections

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