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 19999.44.106

high Tenable Cloud Security Plugin ID 475337

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: ip: orphan prefetched skbs before
multicast forwarding IPv4 and IPv6 input preserve an skb->sk association installed by bpf_sk_assign() so
that local delivery can use the selected socket under RCU. Both address families can also prefetch a
socket in UDP early demux. In both paths (BPF and UDP early demux) a reference is not guaranteed to be
held on the socket. When a multicast packet is not locally deliverable, IPv6 hands the original skb to
ip6_mr_input(). IPv4's ip_mr_input() similarly keeps the original skb when local delivery is not needed.
Either path can put the skb on an unresolved multicast route queue or forward it after the receive-side
RCU section ends. After the prefetched socket is destroyed, a later skb free invokes sock_pfree() and
dereferences the stale skb->sk. Orphan the skb before each non-local multicast forwarding path. Local
delivery retains the original skb; the existing skb_clone() calls provide multicast forwarding with a
socket-free clone. (CVE-2026-89564)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19999.44.106 or later.

Plugin Details

Severity: High

ID: 475337

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/16/2026

Updated: 10/16/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.42

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-89564

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/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: 9/11/2026

Reference Information

CVE: CVE-2026-89564

Detections

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