Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_6: security update to 19216.395.4

high Tenable Cloud Security Plugin ID 469417

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: fuse: reject oversized dirents in page
cache fuse_add_dirent_to_cache() computes a serialized dirent size from the server-controlled namelen
field and copies the dirent into a single page-cache page. The existing logic only checks whether the
dirent fits in the remaining space of the current page and advances to a fresh page if not. It never
checks whether the dirent itself exceeds PAGE_SIZE. As a result, a malicious FUSE server can return a
dirent with namelen=4095, producing a serialized record size of 4120 bytes. On 4 KiB page systems this
causes memcpy() to overflow the cache page by 24 bytes into the following kernel page. Reject dirents that
cannot fit in a single page before copying them into the readdir cache. (CVE-2026-31694)

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: 469417

Version: Revision 1.5

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: 7.7

Percentile: 98.99

Vendor

Vendor Severity: LOW

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-2026-31694

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: 5/1/2026

Reference Information

CVE: CVE-2026-31694

Detections

Analytics