Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12: security update to 19216.395.4

high Tenable Cloud Security Plugin ID 472068

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: btrfs: fix incorrect return value
after changing leaf in lookup_extent_data_ref() After commit 1618aa3c2e01 ("btrfs: simplify return
variables in lookup_extent_data_ref()"), the err and ret variables were merged into a single ret variable.
However, when btrfs_next_leaf() returns 0 (success), ret is overwritten from -ENOENT to 0. If the first
key in the next leaf does not match (different objectid or type), the function returns 0 instead of
-ENOENT, making the caller believe the lookup succeeded when it did not. This can lead to operations on
the wrong extent tree item, potentially causing extent tree corruption. Fix this by returning -ENOENT
directly when the key does not match, instead of relying on the ret variable. (CVE-2026-31666)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19216.395.4 or later.

Plugin Details

Severity: High

ID: 472068

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: 57.76

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-2026-31666

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: 4/24/2026

Reference Information

CVE: CVE-2026-31666

Detections

Analytics