Google: sys-kernel/cchost-kernel-6_12, sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_12, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_18: security update to 19804.0.0

critical Tenable Cloud Security Plugin ID 470735

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: net: ioam6: fix OOB and missing lock
When trace->type.bit6 is set: if (trace->type.bit6) { ... queue = skb_get_tx_queue(dev, skb); qdisc =
rcu_dereference(queue->qdisc); This code can lead to an out-of-bounds access of the dev->_tx[] array when
is_input is true. In such a case, the packet is on the RX path and skb->queue_mapping contains the RX
queue index of the ingress device. If the ingress device has more RX queues than the egress device (dev)
has TX queues, skb_get_queue_mapping(skb) will exceed dev->num_tx_queues. Add a check to avoid this
situation since skb_get_tx_queue() does not clamp the index. This issue has also revealed that per queue
visibility cannot be accurate and will be replaced later as a new feature. While at it, add missing lock
around qdisc_qstats_qlen_backlog(). The function __ioam6_fill_trace_data() is called from both softirq and
process contexts, hence the use of spin_lock_bh() here. (CVE-2026-43083)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19804.0.0 or later.

Plugin Details

Severity: Critical

ID: 470735

Version: Revision 1.6

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/6/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.65

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

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

CVSS Score Source: CVE-2026-43083

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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: 5/6/2026

Reference Information

CVE: CVE-2026-43083

Detections

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