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 20085.0.0

medium Tenable Cloud Security Plugin ID 470978

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: mm/page_table_check: skip special zero
 mappings page_table_check_set() and page_table_check_clear() account mappings based on PageAnon(). Shared
 zero-page PTEs and huge zero PMDs are special mappings, but page_table_check can still account them as
 file-backed pages. An unprivileged process can populate enough zero mappings to overflow file_map_count
 and hit the existing BUG_ON(). The PTE path can do this with the shared zero page, and the PMD path can do
 the same with huge zero mappings. Skip special zero mappings in the user page-table accounting paths. Keep
 the PTE-side pte_special() check, and identify huge zero PMDs from the mapped folio instead of
 pmd_special(). That covers architectures where pmd_special() is a no-op without adding huge_zero_pfn
 checks to the generic counter helpers. (CVE-2026-74600)

Solution

Update the sys-kernel/cchost-kernel-6_18 library and its related packages to version 20085.0.0 or later.

See Also

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

Plugin Details

Severity: Medium

ID: 470978

Version: Revision 1.6

Type: Local

Published: 10/3/2026

Updated: 10/6/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.65

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.1

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

CVSS Score Source: CVE-2026-74600

CVSS v3

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.4

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/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: 8/22/2026

Reference Information

CVE: CVE-2026-74600