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 19999.44.28

medium Tenable Cloud Security Plugin ID 470797

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: futex/pi: Reject cross-mm private
futex owners A private futex key borrows the waiter's mm without taking an mm_users reference.
Nevertheless, attach_to_pi_owner() currently accepts an owner from a different address space and copies
the private key into the owner's PI state. When that owner exits, exit_pi_state_list() uses the saved key
to find the hash bucket and acquires a reference to the waiter's private hash. If the last user of the
waiter's mm exits concurrently, futex_hash_free() frees the hash while the owner still uses its bucket and
reference. Prevent this by validating in attach_to_pi_owner() that, for private futexes, the owner mm and
waiter mm are the same. Perform the check with the owner's pi_lock held and after validating
owner::futex::state to serialize against a concurrent PI-state exit cleanup. [ tglx: Amended comment ]
(CVE-2026-80778)

Solution

Update the sys-kernel/cchost-kernel-6_18 library and its related packages to version 19999.44.28 or later.

Plugin Details

Severity: Medium

ID: 470797

Version: Revision 1.4

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: Medium

Score: 5.7

Percentile: 95.89

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-2026-80778

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 9/4/2026

Reference Information

CVE: CVE-2026-80778

Detections

Analytics