Google: sys-kernel/csql-kernel-6_1, sys-kernel/csql-kernel-6_6, sys-kernel/lakitu-kernel-6_1, sys-kernel/lakitu-kernel-6_6, sys-kernel/lakitu-nc-kernel-6_6, sys-kernel/lakitu-vgpu-kernel-6_6, sys-kernel/tpusev-kernel-6_6: security update to 18613.675.2

medium Tenable Cloud Security Plugin ID 467085

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: bonding: refuse to enslave CAN devices
syzbot reported a kernel paging request crash in can_rx_unregister() inside net/can/af_can.c. The crash
occurs because a virtual CAN device (vxcan) is being enslaved to a bonding master. During the enslavement
process, the bonding driver mutates and modifies the network device states to fit an Ethernet-like
aggregation model. However, CAN devices operate on a completely different Layer 2 architecture, relying on
the CAN mid-layer private data structure (can_ml_priv) instead of standard Ethernet structures. Since
bonding does not initialize or maintain these CAN structures, subsequent operations on the half-enslaved
interface (such as closing associated sockets via isotp_release) lead to a null-pointer dereference when
accessing the CAN receiver lists. Bonding CAN interfaces is architecturally invalid as CAN lacks MAC
addresses, ARP capabilities, and standard Ethernet link-layer mechanisms. While generic loopback devices
are blocked globally in net/core/dev.c, virtual CAN devices bypass this check because they do not carry
the IFF_LOOPBACK flag, despite acting as local software-loopbacks. Fix this by explicitly blocking network
devices of type ARPHRD_CAN from being enslaved at the very beginning of bond_enslave(). This prevents
illegal state mutations, eliminates the resulting KASAN crashes, and avoids potential memory leaks from
incomplete socket cleanups. As the CAN support has been added a long time after bonding the Fixes-tag
points to the introduction of ARPHRD_CAN that would have needed a specific handling in bonding_main.c.
(CVE-2026-63990)

Solution

Update the sys-kernel/csql-kernel-6_1 library and its related packages to version 18613.675.2 or later.

Plugin Details

Severity: Medium

ID: 467085

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: 23.58

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-2026-63990

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: 6/22/2026

Reference Information

CVE: CVE-2026-63990

Detections

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