Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_6: security update to 19216.104.149

medium Tenable Cloud Security Plugin ID 472491

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: irqchip/gic-v3-its: Avoid truncating
memory addresses On 32-bit machines with CONFIG_ARM_LPAE, it is possible for lowmem allocations to be
backed by addresses physical memory above the 32-bit address limit, as found while experimenting with
larger VMSPLIT configurations. This caused the qemu virt model to crash in the GICv3 driver, which
allocates the 'itt' object using GFP_KERNEL. Since all memory below the 4GB physical address limit is in
ZONE_DMA in this configuration, kmalloc() defaults to higher addresses for ZONE_NORMAL, and the ITS driver
stores the physical address in a 32-bit 'unsigned long' variable. Change the itt_addr variable to the
correct phys_addr_t type instead, along with all other variables in this driver that hold a physical
address. The gicv5 driver correctly uses u64 variables, while all other irqchip drivers don't call
virt_to_phys or similar interfaces. It's expected that other device drivers have similar issues, but
fixing this one is sufficient for booting a virtio based guest. (CVE-2026-23085)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19216.104.149 or later.

Plugin Details

Severity: Medium

ID: 472491

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/3/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.52

Vendor

Vendor Severity: MEDIUM

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-2026-23085

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: 2/4/2026

Reference Information

CVE: CVE-2026-23085

Detections

Analytics