Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_6: security update to 19216.220.24

medium Tenable Self-Hosted Container Security Plugin ID 472445

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: net: fix segmentation of forwarding
fraglist GRO This patch enhances GSO segment handling by properly checking the SKB_GSO_DODGY flag for
frag_list GSO packets, addressing low throughput issues observed when a station accesses IPv4 servers via
hotspots with an IPv6-only upstream interface. Specifically, it fixes a bug in GSO segmentation when
forwarding GRO packets containing a frag_list. The function skb_segment_list cannot correctly process GRO
skbs that have been converted by XLAT, since XLAT only translates the header of the head skb.
Consequently, skbs in the frag_list may remain untranslated, resulting in protocol inconsistencies and
reduced throughput. To address this, the patch explicitly sets the SKB_GSO_DODGY flag for GSO packets in
XLAT's IPv4/IPv6 protocol translation helpers (bpf_skb_proto_4_to_6 and bpf_skb_proto_6_to_4). This marks
GSO packets as potentially modified after protocol translation. As a result, GSO segmentation will avoid
using skb_segment_list and instead falls back to skb_segment for packets with the SKB_GSO_DODGY flag. This
ensures that only safe and fully translated frag_list packets are processed by skb_segment_list, resolving
protocol inconsistencies and improving throughput when forwarding GRO packets converted by XLAT.
(CVE-2026-23154)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19216.220.24 or later.

Plugin Details

Severity: Medium

ID: 472445

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/3/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.52

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2026-23154

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: 2/14/2026

Reference Information

CVE: CVE-2026-23154

Detections

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