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 19506.299.82

high Tenable Cloud Security Plugin ID 469017

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/slab: do not limit zeroing to
orig_size when only red zoning is enabled When init (zeroing) on allocation is requested, for kmalloc() we
generally have to zero the full object size even if a smaller size is requested, in order to provide
krealloc()'s __GFP_ZERO guarantees. But if we track the requested size, krealloc() uses that information
to do the right thing, so we can zero only the requested size. With red zoning also enabled, any extra
size became part of the red zone, so it must not be zeroed and thus we must zero only the requested size.
However the current check is imprecise, and will trigger also when only SLAB_RED_ZONE is enabled without
SLAB_STORE_USER (which enables tracking the requested size). This means enabling red zoning alone can
compromise krealloc()'s __GFP_ZERO contract. Fix this by using slub_debug_orig_size() instead, which is
the exact check for whether the requested size is tracked. We don't need to care if red zoning is also
enabled or not. Also update and expand the comment accordingly. (CVE-2026-64368)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.299.82 or later.

Plugin Details

Severity: High

ID: 469017

Version: Revision 1.5

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/6/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.4

Vendor

Vendor Severity: HIGH

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-2026-64368

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: 7/23/2026

Reference Information

CVE: CVE-2026-64368

Detections

Analytics