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 19862.0.0

high Tenable Cloud Security Plugin ID 470084

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: fix nfs4_file access extra count
in nfsd4_add_rdaccess_to_wrdeleg In nfsd4_add_rdaccess_to_wrdeleg, if fp->fi_fds[O_RDONLY] is already set
by another thread, __nfs4_file_get_access should not be called to increment the nfs4_file access count
since that was already done by the thread that added READ access to the file. The extra fi_access count in
nfs4_file can prevent the corresponding nfsd_file from being freed. When stopping nfs-server service,
these extra access counts trigger a BUG in kmem_cache_destroy() that shows nfsd_file object remaining on
__kmem_cache_shutdown. This problem can be reproduced by running the Git project's test suite over NFS.
(CVE-2026-53026)

Solution

Update the sys-kernel/cchost-kernel-6_18 library and its related packages to version 19862.0.0 or later.

Plugin Details

Severity: High

ID: 470084

Version: Revision 1.9

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/7/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.62

Vendor

Vendor Severity: HIGH

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-53026

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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-2026-53026

Detections

Analytics