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 19804.0.0

high Tenable Cloud Security Plugin ID 470336

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: drm: Set old handle to NULL before
prime swap in change_handle There was a potential race condition in change_handle. The ioctl briefly had a
single object with two idr entries; a concurrent gem_close could delete the object and remove one of the
handles while leaving the other one dangling, which could subsequently be dereferenced for a use-after-
free. To fix this, do the same dance that gem_close itself does. (f6cd7daecff5 drm: Release driver
references to handle before making it available again) First idr_replace the old handle to NULL. Later, if
the prime operations are successful, actually close it. create_tail required a similar dance to avoid a
similar problem. (bd46cece51a3 drm/gem: Fix race in drm_gem_handle_create_tail()) It idr_allocs the new
handle with NULL, then swaps in the correct object later to avoid races. We don't need to do that here,
since the only operations that could race are drm_prime, and change_handle holds the prime lock for the
entire duration. v2: cleanups of error paths (CVE-2026-46215)

Solution

Update the sys-kernel/cchost-kernel-6_18 library and its related packages to version 19804.0.0 or later.

Plugin Details

Severity: High

ID: 470336

Version: Revision 1.6

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: High

Score: 7.7

Percentile: 99.01

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-46215

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 5/28/2026

Reference Information

CVE: CVE-2026-46215

Detections

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