Detections
Analytics

Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/csql-kernel-6_6, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-kernel-6_6, sys-kernel/lakitu-nc-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_6, sys-kernel/lakitu-vgpu-kernel-6_6: security update to 19216.655.6

high Tenable Self-Hosted Container Security Plugin ID 468878

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: tcp: challenge ACK for non-exact RST
 in SYN-RECEIVED The SYN-RECEIVED request-socket path in tcp_check_req() accepts an in-window RST without
 requiring SEG.SEQ to exactly match RCV.NXT. A non-exact RST therefore removes the request instead of
 eliciting a challenge ACK. RFC 9293 section 3.10.7.4 applies the RFC 5961 reset check in SYN-RECEIVED: an
 exact RST resets the connection, while a non-exact in-window RST must trigger a challenge ACK and be
 dropped. Apply that check before the ACK-field validation, following the RFC sequence-number, RST, then
 ACK processing order. Factor the per-netns challenge ACK quota out of tcp_send_challenge_ack() so request
 sockets can share it. Use the request socket's send_ack() callback and its own out-of-window ACK timestamp
 to send and rate-limit the response. (CVE-2026-68118)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19216.655.6 or later.

See Also

https://storage.googleapis.com/cos-oval-vulnerability-feed/cos-125.oval.xml.tar.gz

Plugin Details

Severity: High

ID: 468878

Version: Revision 1.5

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: Medium

Score: 5.5

Percentile: 96.22

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-2026-68118

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: 8/10/2026

Reference Information

CVE: CVE-2026-68118