Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12: security update to 19506.120.64

high Tenable Cloud Security Plugin ID 472221

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: fs/ntfs3: validate rec->used in
journal-replay file record check check_file_record() validates rec->total against the record size but
never validates rec->used. The do_action() journal-replay handlers read rec->used from disk and use it to
compute memmove lengths: DeleteAttribute: memmove(attr, ..., used - asize - roff) CreateAttribute:
memmove(..., attr, used - roff) change_attr_size: memmove(..., used - PtrOffset(rec, next)) When rec->used
is smaller than the offset of a validated attribute, or larger than the record size, these subtractions
can underflow allowing us to copy huge amounts of memory in to a 4kb buffer, generally considered a bad
idea overall. This requires a corrupted filesystem, which isn't a threat model the kernel really needs to
worry about, but checking for such an obvious out-of-bounds value is good to keep things robust,
especially on journal replay Fix this up by bounding rec->used correctly. This is much like commit
b2bc7c44ed17 ("fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot") which checked different
values in this same switch statement. (CVE-2026-31716)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.120.64 or later.

Plugin Details

Severity: High

ID: 472221

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: 57.83

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-31716

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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: 5/1/2026

Reference Information

CVE: CVE-2026-31716

Detections

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