Google: sys-kernel/cchost-kernel-6_12, sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_12, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_18: security update to 19999.44.106

high Tenable Cloud Security Plugin ID 475317

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: SUNRPC: Check svc pool percpu counter
allocation __svc_create() initializes three per-pool percpu_counter stats and ignores every return value.
On SMP, percpu_counter_init() fails when __alloc_percpu_gfp() cannot satisfy the allocation, leaving the
failed counter with fbc->counters == NULL and its embedded raw_spinlock_t, list_head, and count never
initialized. __svc_create() returns the half-constructed svc_serv to nfsd, lockd, or the NFS callback
service anyway. Once that service is live, the hot-path increments in svc_xprt_enqueue(),
svc_handle_xprt(), and svc_pool_wake_idle_thread() reach a counter whose backing pointer is NULL. The
pointer is a per-cpu offset, so the access does not fault: it resolves to offset zero of the current CPU's
per-cpu area and silently corrupts whatever variable lives there. A /proc/fs/nfsd/pool_stats read walks
the same NULL per-cpu storage and returns garbage, and on CONFIG_DEBUG_SPINLOCK or lockdep it splats on
the never-initialized lock. Creating the broken service requires a percpu allocation failure during RPC
server startup, so it is reachable only by a local administrator under memory pressure or fault injection;
a remote peer cannot induce the bad state on its own. Check each percpu_counter_init() return value in
__svc_create() and fail when an allocation fails, unwinding the counters already set up in the current
pool and in every pool initialized before it. A discrete percpu_counter_destroy() per counter at teardown
frees each per-cpu allocation exactly once. (CVE-2026-89547)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19999.44.106 or later.

Plugin Details

Severity: High

ID: 475317

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/16/2026

Updated: 10/16/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.25

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 5.6

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

CVSS Score Source: CVE-2026-89547

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/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: 9/11/2026

Reference Information

CVE: CVE-2026-89547

Detections

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