Detections
Analytics

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 20198.0.0

medium Tenable Cloud Security Plugin ID 475669

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: smb: client: reject userspace
 cifs.idmap descriptions cifs.idmap key descriptions carry authority-bearing fields (owner and group SIDs
 and uid/gid values in "os:"/"gs:"/"oi:"/"gi:" form) that the cifs.idmap upcall helper treats as kernel-
 originating inputs. Unlike its sibling cifs.spnego, the cifs.idmap key type has no vet_description hook,
 so userspace can create keys of this type through request_key(2)/add_key(2) and supply those fields
 without CIFS origin. A request_key(2) call with a non-NULL callout then drives a root usermodehelper
 upcall (/sbin/request-key -> cifs.idmap) that consumes the unvetted description in root context. Only
 accept cifs.idmap descriptions while CIFS is using its private root_cred to request the key.
 id_to_sid()/sid_to_id() already run under override_creds(root_cred), so the kernel-originated path is
 unaffected. This mirrors commit 3da1fdf4efbc ("smb: client: reject userspace cifs.spnego descriptions"),
 which applied the same restriction to cifs.spnego. (CVE-2026-97564)

Solution

Update the sys-kernel/cchost-kernel-6_18 library and its related packages to version 20198.0.0 or later.

See Also

https://storage.googleapis.com/cos-oval-vulnerability-feed/cos-138.oval.xml.tar.gz

Plugin Details

Severity: Medium

ID: 475669

Version: Revision 1.1

Type: Local

Published: 10/16/2026

Updated: 10/16/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.63

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-2026-97564

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:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 9/25/2026

Reference Information

CVE: CVE-2026-97564