Detections
Analytics

Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_12: security update to 19506.299.3

high Tenable Cloud Security Plugin ID 469491

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: netfilter: conntrack: tcp: do not
 force CLOSE on invalid-seq RST without direction check An unintended behavior in the TCP conntrack state
 machine allows a connection to be forced into the CLOSE state using an RST packet with an invalid sequence
 number. Specifically, after a SYN packet is observed, an RST with an invalid SEQ can transition the
 conntrack entry to TCP_CONNTRACK_CLOSE, regardless of whether the RST corresponds to the expected reply
 direction. The relevant code path assumes the RST is a response to an outgoing SYN, but does not validate
 packet direction or ensure that a matching SYN was actually sent in the opposite direction. As a result, a
 crafted packet sequence consisting of a SYN followed by an invalid-sequence RST can prematurely terminate
 an active NAT entry. This makes connection teardown easier than intended. So, tighten the state transition
 logic to ensure that RST-triggered CLOSE transitions only occur when the RST is a valid response to a
 previously observed SYN in the correct direction. (CVE-2026-63913)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.299.3 or later.

See Also

https://storage.googleapis.com/cos-oval-vulnerability-feed/cos-129.oval.xml.tar.gz

Plugin Details

Severity: High

ID: 469491

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: 3.5

Percentile: 51.46

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

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

CVSS Score Source: CVE-2026-63913

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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: 6/22/2026

Reference Information

CVE: CVE-2026-63913