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 19506.299.3

high Tenable Self-Hosted Container Security Plugin ID 469674

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: ethtool: cmis: require exact CDB reply
length Malicious SFP module could respond with rpl_len longer than what cmis_cdb_process_reply() expected,
leading to OOB writes. Malicious HW is a bit theoretical but some modules may just be buggy and/or the
reads may occasionally get corrupted, so let's protect the kernel. The existing check protects from short
replies. We need to protect from long ones, too. All callers that pass a non-zero rpl_exp_len cast the
reply payload to a fixed-layout struct and read fields at fixed offsets, with no version negotiation or
short-reply handling: - cmis_cdb_validate_password() - cmis_cdb_module_features_get() -
cmis_fw_update_fw_mng_features_get() so let's assume that responses longer than expected do not have to be
handled gracefully here. Add a warning message to make the debug easier in case my understanding is
wrong... Note that page_data->length (argument of kmalloc) comes from last arg to ethtool_cmis_page_init()
which is rpl_exp_len. Note2 that AIs also like to point out overflows in args->req.payload itself (which
is a fixed-size 120 B buffer, on the stack), but callers should be reading structs defined by the
standard, so protecting from requests for more data than max seem like defensive programming.
(CVE-2026-63996)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.299.3 or later.

Plugin Details

Severity: High

ID: 469674

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: Medium

Score: 4.9

Percentile: 58.27

Vendor

Vendor Severity: HIGH

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-2026-63996

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: 6/22/2026

Reference Information

CVE: CVE-2026-63996

Detections

Analytics