Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_12: security update to 19506.0.66

critical Tenable Self-Hosted Container Security Plugin ID 469603

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: tls: Fix race condition in
tls_sw_cancel_work_tx() This issue was discovered during a code audit. After cancel_delayed_work_sync() is
called from tls_sk_proto_close(), tx_work_handler() can still be scheduled from paths such as the Delayed
ACK handler or ksoftirqd. As a result, the tx_work_handler() worker may dereference a freed TLS object.
The following is a simple race scenario: cpu0 cpu1 tls_sk_proto_close() tls_sw_cancel_work_tx()
tls_write_space() tls_sw_write_space() if (!test_and_set_bit(BIT_TX_SCHEDULED, &tx_ctx->tx_bitmask))
set_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask); cancel_delayed_work_sync(&ctx->tx_work.work);
schedule_delayed_work(&tx_ctx->tx_work.work, 0); To prevent this race condition,
cancel_delayed_work_sync() is replaced with disable_delayed_work_sync(). (CVE-2026-23240)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.0.66 or later.

Plugin Details

Severity: Critical

ID: 469603

Version: Revision 1.3

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/3/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.94

Vendor

Vendor Severity: CRITICAL

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-23240

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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: 3/10/2026

Reference Information

CVE: CVE-2026-23240

Detections

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