Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12: security update to 19506.0.140

high Tenable Cloud Security Plugin ID 469379

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: Fix pci_slot_trylock() error
handling Commit a4e772898f8b ("PCI: Add missing bridge lock to pci_bus_lock()") delegates the bridge
device's pci_dev_trylock() to pci_bus_trylock() in pci_slot_trylock(), but it forgets to remove the
corresponding pci_dev_unlock() when pci_bus_trylock() fails. Before a4e772898f8b, the code did: if
(!pci_dev_trylock(dev)) /* <- lock bridge device */ goto unlock; if (dev->subordinate) { if
(!pci_bus_trylock(dev->subordinate)) { pci_dev_unlock(dev); /* <- unlock bridge device */ goto unlock; } }
After a4e772898f8b the bridge-device lock is no longer taken, but the pci_dev_unlock(dev) on the failure
path was left in place, leading to the bug. This yields one of two errors: 1. A warning that the lock is
being unlocked when no one holds it. 2. An incorrect unlock of a lock that belongs to another thread. Fix
it by removing the now-redundant pci_dev_unlock(dev) on the failure path. [Same patch later posted by
Keith at https://patch.msgid.link/[email protected]] (CVE-2026-43211)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.0.140 or later.

Plugin Details

Severity: High

ID: 469379

Version: Revision 1.3

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/5/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.14

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-43211

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 4/1/2026

Reference Information

CVE: CVE-2026-43211

Detections

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