Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_12: security update to 19506.224.80

medium Tenable Self-Hosted Container Security Plugin ID 469300

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: md: wake raid456 reshape waiters
before suspend During raid456 reshape, direct IO across the reshape position can sleep in
raid5_make_request() waiting for reshape progress while still holding an active_io reference. If userspace
then freezes reshape and writes md/suspend_lo or md/suspend_hi, mddev_suspend() kills active_io and waits
for all in-flight IO to drain. This can deadlock: the IO needs reshape progress to continue, but the
reshape thread is already frozen, so the active_io reference is never dropped and suspend never completes.
raid5_prepare_suspend() already wakes wait_for_reshape for dm-raid. Do the same for normal md suspend when
reshape is already interrupted, so waiting raid456 IO can abort, drop its reference, and let suspend
finish. The mdadm test tests/25raid456-reshape-deadlock reproduces the hang. (CVE-2026-53123)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.224.80 or later.

Plugin Details

Severity: Medium

ID: 469300

Version: Revision 1.4

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/5/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.63

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-2026-53123

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-2026-53123

Detections

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