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 19216.739.5

high Tenable Cloud Security Plugin ID 474898

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: cifs: Fix server use-after-free in
cifs_chan_skip_or_disable() When a secondary channel is no longer supported by the server,
cifs_chan_skip_or_disable() drops the channel reference with cifs_put_tcp_session() and then continues to
use the server pointer by calling cifs_signal_cifsd_for_reconnect() on it and reading its primary_server
pointer. cifs_put_tcp_session() can drop the last reference of the channel and tear it down, so both the
channel and the primary server (whose reference is also dropped by cifs_put_tcp_session()) can be freed
before they are signaled for reconnect. Signal the channel and the primary server and capture the primary
server pointer before dropping the channel reference with cifs_put_tcp_session(). (CVE-2026-98261)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19216.739.5 or later.

Plugin Details

Severity: High

ID: 474898

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: 4.9

Percentile: 58.38

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 5.6

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

CVSS Score Source: CVE-2026-98261

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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: 10/6/2026

Reference Information

CVE: CVE-2026-98261

Detections

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