Detections
Analytics

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 20085.0.0

medium Tenable Cloud Security Plugin ID 471026

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: tracing: Fix union collision of module
 and refcnt for dynamic events In 'struct trace_event_call', the 'module' pointer and the 'refcnt' atomic
 variable share the same memory space in a union. For dynamic events, the union member is 'refcnt', which
 acts as an active reference counter. When a dynamic event (such as kprobe, uprobe, fprobe, eprobe, or
 wprobe) has a non-zero reference count (e.g. due to active event triggers or perf attachments), its
 'call->module' evaluates to a small non-zero integer instead of NULL. When filtering or setting events for
 a specific module (e.g., writing ':mod:<module>' to 'set_event'), the code in
 '__ftrace_set_clr_event_nolock()' and 'update_event_fields()' reads 'call->module' directly without
 checking whether the event is dynamic. This causes the kernel to treat the small integer (refcnt) as a
 'struct module' pointer, leading to a NULL/invalid pointer dereference (Oops) when dereferencing the
 module name. Fix this by ensuring that the 'TRACE_EVENT_FL_DYNAMIC' flag is checked before treating
 'call->module' as a valid pointer in these code paths. (CVE-2026-68174)

Solution

Update the sys-kernel/cchost-kernel-6_18 library and its related packages to version 20085.0.0 or later.

See Also

https://storage.googleapis.com/cos-oval-vulnerability-feed/cos-138.oval.xml.tar.gz

Plugin Details

Severity: Medium

ID: 471026

Version: Revision 1.5

Type: Local

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: 4.9

Percentile: 58.36

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

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

CVSS Score Source: CVE-2026-68174

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:N/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: 8/10/2026

Reference Information

CVE: CVE-2026-68174