Google: sys-kernel/csql-kernel-6_1, sys-kernel/csql-kernel-6_6, sys-kernel/lakitu-kernel-6_1, sys-kernel/lakitu-kernel-6_6, sys-kernel/lakitu-nc-kernel-6_6, sys-kernel/lakitu-vgpu-kernel-6_6, sys-kernel/tpusev-kernel-6_6: security update to 18613.613.5

high Tenable Cloud Security Plugin ID 465908

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: xen/privcmd: restrict usage in
unprivileged domU The Xen privcmd driver allows to issue arbitrary hypercalls from user space processes.
This is normally no problem, as access is usually limited to root and the hypervisor will deny any
hypercalls affecting other domains. In case the guest is booted using secure boot, however, the privcmd
driver would be enabling a root user process to modify e.g. kernel memory contents, thus breaking the
secure boot feature. The only known case where an unprivileged domU is really needing to use the privcmd
driver is the case when it is acting as the device model for another guest. In this case all hypercalls
issued via the privcmd driver will target that other guest. Fortunately the privcmd driver can already be
locked down to allow only hypercalls targeting a specific domain, but this mode can be activated from user
land only today. The target domain can be obtained from Xenstore, so when not running in dom0 restrict the
privcmd driver to that target domain from the beginning, resolving the potential problem of breaking
secure boot. This is XSA-482 --- V2: - defer reading from Xenstore if Xenstore isn't ready yet (Jan
Beulich) - wait in open() if target domain isn't known yet - issue message in case no target domain found
(Jan Beulich) (CVE-2026-31788)

Solution

Update the sys-kernel/csql-kernel-6_1 library and its related packages to version 18613.613.5 or later.

Plugin Details

Severity: High

ID: 465908

Version: Revision 1.3

Type: Local

Family: Google COS Security Checks

Published: 10/2/2026

Updated: 10/3/2026

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

Risk Information

VPR

Risk Factor: High

Score: 7

Percentile: 98.33

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

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

CVSS Score Source: CVE-2026-31788

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.1

Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/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: 3/25/2026

Reference Information

CVE: CVE-2026-31788

Detections

Analytics