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

high Tenable Cloud Security Plugin ID 472525

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: apparmor: fix race on rawdata
dereference There is a race condition that leads to a use-after-free situation: because the rawdata inodes
are not refcounted, an attacker can start open()ing one of the rawdata files, and at the same time remove
the last reference to this rawdata (by removing the corresponding profile, for example), which frees its
struct aa_loaddata; as a result, when seq_rawdata_open() is reached, i_private is a dangling pointer and
freed memory is accessed. The rawdata inodes weren't refcounted to avoid a circular refcount and were
supposed to be held by the profile rawdata reference. However during profile removal there is a window
where the vfs and profile destruction race, resulting in the use after free. Fix this by moving to a
double refcount scheme. Where the profile refcount on rawdata is used to break the circular dependency.
Allowing for freeing of the rawdata once all inode references to the rawdata are put. (CVE-2026-23410)

Solution

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

Plugin Details

Severity: High

ID: 472525

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/3/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.94

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-2026-23410

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-2026-23410

Detections

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