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 19506.299.116

critical Tenable Cloud Security Plugin ID 469509

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/sched: cls_api: Handle
TC_ACT_CONSUMED in tcf_qevent_handle tcf_classify() can return TC_ACT_CONSUMED while the skb is held by
the defragmentation engine (e.g. act_ct on out-of-order fragments). When that happens the skb is no longer
owned by the caller and must not be touched again. tcf_qevent_handle() did not handle TC_ACT_CONSUMED: it
fell through the switch and returned the skb to the caller as if classification had passed. The only qdisc
that wires up qevents today is RED, via three call sites (qe_mark on RED_PROB_MARK/HARD_MARK,
qe_early_drop on congestion_drop) red_enqueue() was continuing to operate on an skb it no longer owns in
this case -- enqueueing it, dropping it, or updating statistics. Resulting in a UAF. tc qdisc add dev eth0
root handle 1: red ... qevent early_drop block 10 tc filter add block 10 ... action ct (with ct defrag
enabled and traffic that produces out-of-order fragments, e.g. a fragmented UDP stream) Handle
TC_ACT_CONSUMED in tcf_qevent_handle() the same way the ingress and egress fast paths do: treat it as
stolen and return NULL without touching the skb. Unlike the TC_ACT_STOLEN case, the skb must not be
dropped/freed here, as it is no longer owned by us. (CVE-2026-64530)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.299.116 or later.

Plugin Details

Severity: Critical

ID: 469509

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: 4.9

Percentile: 58.14

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-2026-64530

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: 7/26/2026

Reference Information

CVE: CVE-2026-64530

Detections

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