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 19506.224.49

medium Tenable Cloud Security Plugin ID 470072

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: io_uring/waitid: clear waitid info
before copying it to userspace IORING_OP_WAITID stores its result fields in struct io_waitid::info and
later copies them to userspace siginfo. The prep path initializes the request arguments, but it does not
initialize info itself. If the wait operation completes without reporting a child event, the common wait
code can return without writing wo_info. In that case io_waitid_finish() still copies iw->info to
userspace, exposing stale bytes from the reused io_kiocb command storage. Clear the result storage during
prep so the io_uring path matches the regular waitid syscall, which uses a zero-initialized struct
waitid_info. (CVE-2026-46315)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.224.49 or later.

Plugin Details

Severity: Medium

ID: 470072

Version: Revision 1.6

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: Low

Score: 3

Percentile: 23.77

Vendor

Vendor Severity: MEDIUM

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2026-46315

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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: 6/9/2026

Reference Information

CVE: CVE-2026-46315

Detections

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