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 20162.0.0

medium Tenable Cloud Security Plugin ID 475743

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: arm64: mm: Fix the lockless page-table
 walk in show_pte() show_pte() walks page tables locklessly and can run with interrupts enabled. A
 concurrent teardown can free a table page while it is being walked. It can also clear a parent entry after
 show_pte() checked it; the regular pXd_offset() helpers then reread the cleared entry and can derive a
 bogus lower-level pointer and fault again. Use the lockless offset helpers with the saved parent entries,
 as gup_fast() does, and pass the saved PMD to pte_offset_map(). For task page tables, arm64 selects
 MMU_GATHER_RCU_TABLE_FREE. Disable local interrupts around the walk to hold off RCU-deferred table frees
 and block the tlb_remove_table_sync_one() IPI until the walk is finished. Place the IRQ guard after the
 header print. This does not make the output a consistent snapshot, but prevents the task page-table walk
 from dereferencing a released table page or deriving a pointer from a different parent value.
 (CVE-2026-93239)

Solution

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

See Also

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

Plugin Details

Severity: Medium

ID: 475743

Version: Revision 1.1

Type: Local

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: Medium

Base Score: 6.3

Temporal Score: 4.7

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

CVSS Score Source: CVE-2026-93239

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-2026-93239