Detections
Analytics

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 Self-Hosted Container Security Plugin ID 475599

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: btrfs: zstd: fix lost wakeup when
 waiting for a workspace A writer can sleep forever in zstd_get_workspace() even though a workspace is
 free. When zstd_alloc_workspace() fails, the task is queued on zwsm->wait and schedules unconditionally,
 never re-testing the pool. zstd_put_workspace() publishes the workspace and then calls cond_wake_up(),
 which only wakes when a sleeper is already visible, so a workspace returned between the failed allocation
 and prepare_to_wait() wakes nobody. The window is wide: zstd_alloc_workspace() goes through kvmalloc() and
 may enter reclaim. Only a max level workspace triggers the wakeup and one is deliberately kept allocated
 as the fallback every waiter waits for, so once its wakeup is lost the writer stays in
 TASK_UNINTERRUPTIBLE until some other task happens to return one. Re-check the pool after
 prepare_to_wait() has published the waiter, and use the workspace if one turned up. (CVE-2026-98079)

Solution

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

See Also

https://storage.googleapis.com/cos-oval-vulnerability-feed/cos-138.oval.xml.tar.gz

Plugin Details

Severity: Medium

ID: 475599

Version: Revision 1.1

Type: Local

Published: 10/16/2026

Updated: 10/16/2026

Risk Information

VPR

Risk Factor: Medium

Score: 5.7

Percentile: 95.9

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 4.1

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

CVSS Score Source: CVE-2026-98079

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-2026-98079