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 20085.0.0

medium Tenable Cloud Security Plugin ID 471561

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: erofs: cap LZMA stream pool size
 fs/erofs/decompressor_lzma.c sizes the module-global MicroLZMA stream pool from num_possible_cpus() when
 the lzma_streams module parameter is unset, then z_erofs_load_lzma_config() preallocates one image-
 supplied dictionary per stream, accepting dictionaries up to 8 MiB. On high-CPU systems, a small EROFS
 image can pin hundreds of MiB of vmalloc-backed decoder state until the erofs module is unloaded. Impact:
 An EROFS image mounted by the system can pin up to 8 MiB of vmalloc memory per LZMA stream, either as
 intended or unexpectedly. Bound the default stream count by a new
 CONFIG_EROFS_FS_ZIP_LZMA_DEFAULT_MAX_STREAMS option, default 16, so the worst-case default preallocation
 is 128 MiB if the number of CPUs is no less than 16 while preserving the existing per-image dictionary
 limit. An explicit lzma_streams module parameter is still honoured as-is, so administrators who
 deliberately size the pool are not affected. (CVE-2026-80892)

Solution

Update the sys-kernel/cchost-kernel-6_18 library and its related packages to version 20085.0.0 or later.

See Also

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

Plugin Details

Severity: Medium

ID: 471561

Version: Revision 1.6

Type: Local

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: 23.63

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-2026-80892

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: 8/31/2026

Reference Information

CVE: CVE-2026-80892