Google: sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_18: security update to 20162.0.0

high Tenable Cloud Security Plugin ID 475626

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: nfsd: add missing read barrier to
rpc_status_get dumpit seqcount retry The hand-rolled seqcount-like protocol in
nfsd_nl_rpc_status_get_dumpit() is missing a read memory barrier (smp_rmb) before its second counter
check. The standard kernel read_seqcount_retry() includes smp_rmb() to ensure that all data reads complete
before the counter is re-checked. Without this barrier, on weakly-ordered architectures (ARM, POWER), the
CPU may reorder field reads past the second counter check, making the retry logic ineffective: it could
observe a consistent counter pair while reading fields that have been concurrently modified by the writer.
Add smp_rmb() before the second counter check to order the field reads ahead of it, matching the barrier
semantics of the standard seqcount read-side. The begin-side smp_load_acquire() already pairs with the
smp_store_release() in nfsd_dispatch(); with the smp_rmb() now ordering the field reads, the retry check
no longer needs acquire semantics and reads the counter with a plain READ_ONCE(), as read_seqcount_retry()
does. [ cel: Use READ_ONCE instead of smp_load_acquire() ] (CVE-2026-93229)

Solution

Update the sys-kernel/cchost-kernel-6_18 library and its related packages to version 20162.0.0 or later.

Plugin Details

Severity: High

ID: 475626

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: 4.3

Percentile: 53.43

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 4.6

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

CVSS Score Source: CVE-2026-93229

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

Vector: CVSS:3.0/AV:L/AC:L/PR:L/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: 9/24/2026

Reference Information

CVE: CVE-2026-93229

Detections

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