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

high Tenable Cloud Security Plugin ID 475620

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 untrusted allocated-object
 pointers When the final RCU read-side critical section ends, a local kptr is demoted to PTR_UNTRUSTED but
 retains MEM_ALLOC. The pointer may be NULL or may refer to an object whose lifetime is no longer
 protected. type_is_ptr_alloc_obj() nevertheless recognizes any PTR_TO_BTF_ID with MEM_ALLOC as a live
 allocated object. In particular, a refcount-only local kptr never carries NON_OWN_REF, so it still passes
 the bpf_refcount_acquire() argument check after RCU protection ends. The kfunc can then dereference NULL
 or stale memory. Make type_is_ptr_alloc_obj() reject PTR_UNTRUSTED pointers. Since
 type_is_non_owning_ref() is based on the same predicate, graph kfunc arguments obey the same live-object
 requirement. Fault-protected reads of the demoted pointer remain valid: writes are already rejected, and
 read fixups use bpf_may_fault_on_deref() rather than this predicate. [ kkd: Rewrote commit log ]
 (CVE-2026-98037)

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: High

ID: 475620

Version: Revision 1.1

Type: Local

Published: 10/16/2026

Updated: 10/16/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.43

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Low

Base Score: 3.6

Temporal Score: 2.7

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

CVSS Score Source: CVE-2026-98037

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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-2026-98037