Google: sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_18: security update to 20198.0.0

medium Tenable Cloud Security Plugin ID 475722

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: Reject resilient lock operations
in rbtree callbacks __bpf_rbtree_add() keeps parent and link pointers live across calls to the program-
supplied comparison callback. The verifier therefore requires the root's lock to remain held throughout
the callback. The helper path enforces this rule for bpf_spin_lock() and bpf_spin_unlock(), but the
resilient lock kfunc argument path does not. Since resilient locks may protect BPF rbtree roots, a
callback can release the root lock and let another CPU remove and free the node referenced by the in-
progress tree walk. The walk then resumes using freed pointers. Reject resilient lock kfuncs in an rbtree
comparison callback, matching the existing policy for the spin lock helpers. Resilient-lock-protected
trees remain valid when their comparison callbacks leave lock state alone. (CVE-2026-98060)

Solution

Update the sys-kernel/cchost-kernel-6_18 library and its related packages to version 20198.0.0 or later.

Plugin Details

Severity: Medium

ID: 475722

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/16/2026

Updated: 10/16/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.74

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-98060

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: 9/25/2026

Reference Information

CVE: CVE-2026-98060

Detections

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