Google: sys-kernel/cchost-kernel-6_12, sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_12, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_18: security update to 19999.44.106

high Tenable Self-Hosted Container Security Plugin ID 475339

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: PCI/proc: Use file_ns_capable() when
checking config space read access proc_bus_pci_read() decides how much of the config space is readable
based on capable(CAP_SYS_ADMIN), which checks the credentials of the task calling read(), not the
credentials of the process that opened the file. The sysfs equivalent, pci_read_config(), has checked the
credentials of the opening process since commit de139a339395 ("pci: check caps from sysfs file open to
read device dependent config space"), so a privileged process can open the config space file and pass the
file descriptor to an unprivileged process (for example, a process running a KVM guest with an assigned
device), which can then read the entire config space. The check was subsequently routed through the LSM
framework in commit 47970b1b2aa6 ("pci: use security_capable() when checking capablities during config
space read") and converted to the dedicated helper in commit ab0fa82b2df9 ("pci-sysfs: use proper file
capability helper function"). Thus, the two interfaces check the same capability against different
credentials. Checking the credentials of the task calling read() makes the outcome depend on who reads
rather than who opened, so the restriction is bypassed whenever a more privileged process reads through
the descriptor. Checking the credentials recorded in file->f_cred settles the decision at open() time and
ties it to the file, where it cannot change with the caller. Use file_ns_capable() to check CAP_SYS_ADMIN
against the credentials in effect when the file was opened, bringing the procfs interface in line with the
sysfs behaviour. As a result, a file descriptor opened by a privileged process and passed to an
unprivileged one now allows the entire config space to be read through procfs, matching sysfs.
(CVE-2026-93206)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19999.44.106 or later.

Plugin Details

Severity: High

ID: 475339

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: 53.43

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Low

Base Score: 1.9

Temporal Score: 1.4

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

CVSS Score Source: CVE-2026-93206

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/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: 9/24/2026

Reference Information

CVE: CVE-2026-93206

Detections

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