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

medium Tenable Self-Hosted Container Security Plugin ID 475533

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: lockd: fix swapped arguments in
nlmsvc_match_ip() When releasing locks by server IP address via /proc/fs/nfsd/unlock_ip,
nlmsvc_unlock_all_by_ip() calls nlm_traverse_files() with the server sockaddr as the opaque @data
argument: nlm_traverse_files(server_addr, nlmsvc_match_ip, NULL); The match callback is later invoked from
nlm_traverse_locks() as: match(lockhost, host); where the first argument is the nlm_host that owns the
lock, and the second argument is the @data that was originally passed down (here the server sockaddr).
This is the convention every other match callback relies on (nlmsvc_mark_host(), nlmsvc_same_host(),
nlmsvc_is_client()): arg1 is the real nlm_host, arg2 is the caller-supplied reference value.
nlmsvc_match_ip() has had these two arguments reversed ever since the unlock-by-IP feature was introduced
in commit 4373ea84c84d ("lockd: unlock lockd locks associated with a given server ip"): return
rpc_cmp_addr(nlm_srcaddr(host), datap); Here @host is actually the server sockaddr, so nlm_srcaddr(host)
dereferences a struct sockaddr as a struct nlm_host and reads garbage at the offset of h_srcaddr;
meanwhile @datap is actually the lock owner's nlm_host but is compared as a sockaddr. As a result the
comparison practically never matches and locks are not released for the requested IP. Swap the arguments
so the lock owner's source address is compared against the requested server address: return
rpc_cmp_addr(nlm_srcaddr(datap), (struct sockaddr *)host); [ cel: fix the misleading typedef parameter
names too ] (CVE-2026-93231)

Solution

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

Plugin Details

Severity: Medium

ID: 475533

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/16/2026

Updated: 10/16/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.6

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-93231

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: 9/24/2026

Reference Information

CVE: CVE-2026-93231

Detections

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