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 19506.299.36

high Tenable Self-Hosted Container Security Plugin ID 469879

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: xfs: resample the data fork mapping
after cycling ILOCK xfs_reflink_fill_{cow_hole,delalloc} are both presented with an inode, a data fork
mapping, and a cow fork mapping. Unfortunately, these two helpers cycle the ILOCK to grab a transaction,
which means that the mappings are stale as soon as we reacquire the ILOCK. Currently we refresh the cow
fork mapping by re-calling xfs_find_trim_cow_extent, but we don't refresh the data fork mapping
beforehand, which means that the xfs_bmap_trim_cow in that function queries the refcount btree about the
wrong physical blocks and returns an inaccurate value in *shared. If *shared is now false, the directio
write proceeds with a stale data fork mapping. Fix this by querying the data fork mapping if the sequence
counter changes across the ILOCK cycle. (CVE-2026-64600)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.299.36 or later.

Plugin Details

Severity: High

ID: 469879

Version: Revision 1.6

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: High

Score: 7.9

Percentile: 99.36

Vendor

Vendor Severity: HIGH

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-64600

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 7/15/2026

Reference Information

CVE: CVE-2026-64600

Detections

Analytics