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

high Tenable Self-Hosted Container Security Plugin ID 475683

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: scsi: core: Validate MODE SENSE
lengths in scsi_cdl_enable() scsi_cdl_enable() uses length fields returned by MODE SENSE to locate the ATA
feature mode page in a 64-byte stack buffer. A target can report a total length shorter than its mode
header and block descriptors. The unsigned subtraction used for the MODE SELECT length can wrap, and the
separately computed buf_data can point beyond buf. During automatic scan, enable is false, so the read-
modify-write of buf_data[4] can clear the low two bits of a target-selected out-of-bounds stack byte.
scsi_mode_select() can then copy up to 64 bytes from outside the buffer into the outgoing MODE SELECT
payload, disclosing stack contents to the target. This is reachable while scanning a USB storage device
that identifies as an ATA device and advertises CDL support. No filesystem mount or userspace access to
the block device is required. On upstream commit cee9395acd80 ("Linux 7.3-rc1"), a build-specific, one-
vCPU QEMU/Raw Gadget proof using QEMU-only multi-UDC allocator sampling executed a fixed proof command
inside the guest and created a UID-0-owned marker during automatic enumeration, with KASLR and NX enabled.
The issue was independently found during security research at Drivesec S.r.l. Cap the available length to
the buffer size. Validate and consume the mode header and block descriptor lengths before using the page,
and require the five bytes needed to access the CDL field. (CVE-2026-98232)

Solution

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

Plugin Details

Severity: High

ID: 475683

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/16/2026

Updated: 10/16/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.48

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-2026-98232

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/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: 10/6/2026

Reference Information

CVE: CVE-2026-98232

Detections

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