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 20162.0.0

medium Tenable Self-Hosted Container Security Plugin ID 475762

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: reject duplicate CREDS_VALUE
 options gssx_dec_option_array() walks the wire-supplied option array and, for every entry whose name
 matches CREDS_VALUE, calls gssx_dec_linux_creds() on the same struct svc_cred. That helper unconditionally
 installs a fresh groups_alloc() result into creds->cr_group_info without releasing whatever pointer was
 already there: for (i = 0; i < count; i++) { ... decode name ... if (length == sizeof(CREDS_VALUE) &&
 memcmp(p, CREDS_VALUE, sizeof(CREDS_VALUE)) == 0) { err = gssx_dec_linux_creds(xdr, creds); ... } } A
 reply that carries two CREDS_VALUE entries therefore overwrites cr_group_info on the second iteration and
 orphans the group_info allocated by the first call. The earlier free_creds path only releases the last
 cr_group_info via free_svc_cred(), so the first allocation's refcount stays at one and its kvmalloc-backed
 storage is leaked. No in-tree caller of gssp_accept_sec_context_upcall() expects more than one CREDS_VALUE
 per reply. Fix by tracking whether a CREDS_VALUE option has already been decoded and returning -EINVAL on
 any subsequent match, so the free_creds path releases the single group_info that was installed.
 (CVE-2026-89539)

Solution

Update the sys-kernel/cchost-kernel-6_18 library and its related packages to version 20162.0.0 or later.

See Also

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

Plugin Details

Severity: Medium

ID: 475762

Version: Revision 1.1

Type: Local

Published: 10/16/2026

Updated: 10/16/2026

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

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-2026-89539

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: 9/11/2026

Reference Information

CVE: CVE-2026-89539