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 19506.448.8

high Tenable Self-Hosted Container Security Plugin ID 469077

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: bpf: Reset register bounds before
narrowing retval range in check_mem_access() When the BPF verifier processes a context load of an LSM hook
return value, it calls __mark_reg_s32_range() to narrow the register to the hook's valid range. However,
__mark_reg_s32_range() intersects the new range with the register's existing bounds using max_t()/min_t()
rather than replacing them. If the destination register carries stale bounds from a prior instruction
(e.g. BPF_MOV64_IMM), the intersection can produce a range narrower than reality. The verifier then
believes it knows the register's exact value, while at runtime the actual hook return value is loaded,
creating a verifier/runtime mismatch that can be used to bypass BPF memory safety checks. The else branch
already calls mark_reg_unknown() to reset register state before any narrowing. Apply the same reset in the
is_retval path so stale bounds are cleared before __mark_reg_s32_range() intersects. (CVE-2026-72111)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.448.8 or later.

Plugin Details

Severity: High

ID: 469077

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: 5

Percentile: 93.77

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-2026-72111

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/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: 8/11/2026

Reference Information

CVE: CVE-2026-72111

Detections

Analytics