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 475211

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: release path refs on
follow_down() error nfsd_cross_mnt() initializes a local struct path with mntget() and dget() before
calling follow_down(). On a negative return the error arm jumps to out without releasing those references:
err = follow_down(&path, follow_flags); if (err < 0) goto out; follow_down() never drops the caller's
entry-time refs on any error sub-case; for example a pre-cross d_manage() failure leaves path untouched,
so the mntget()/dget() taken on entry survive the call. Every other early-exit arm in nfsd_cross_mnt()
(other-namespace return, IS_ERR(exp2), and the success tail after the swap) already calls path_put(&path);
the err < 0 arm is the lone omission. The leak inflates mnt_count and d_count on each failed cross-mount,
blocking umount and pinning dentries against the shrinker, and is reachable by any authenticated NFS
client through nfsd_lookup_dentry or the NFSv4 READDIR encode path. Fix by calling path_put(&path) before
the goto out in the err < 0 arm so the entry-time refs are released on all follow_down() error returns.
(CVE-2026-89707)

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: 475211

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: 5

Percentile: 93.04

Vendor

Vendor Severity: LOW

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-2026-89707

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: 9/11/2026

Reference Information

CVE: CVE-2026-89707

Detections

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