Google: sys-kernel/cchost-kernel-6_12, sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_12, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_18: security update to 19999.44.21

critical Tenable Self-Hosted Container Security Plugin ID 471116

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: xfrm: fix stale skb->prev after async
crypto steals a GSO segment skb_gso_segment() leaves the segment list head with ->prev pointing at the
last segment, an invariant validate_xmit_skb_list() relies on when it sets its tail pointer (tail =
skb->prev). When validate_xmit_xfrm() walks a GSO list and some segments are stolen by async crypto
(->xmit() returns -EINPROGRESS), those segments are unlinked from the list but the head ->prev is never
updated. If the last segment is the one stolen, the returned head still has ->prev pointing at it, even
though it is now owned by the crypto engine and may be freed. validate_xmit_skb_list() later does
tail->next = skb, writing through that stale pointer -- a use-after-free. Repoint skb->prev at the last
retained segment before returning. (CVE-2026-68426)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19999.44.21 or later.

Plugin Details

Severity: Critical

ID: 471116

Version: Revision 1.6

Type: Local

Family: Google COS Security Checks

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: 6.9

Percentile: 96.53

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-68426

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-2026-68426

Detections

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