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 19999.44.28

high Tenable Self-Hosted Container Security Plugin ID 470863

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: packet: use consistent hard_header_len
in non-ring send paths packet_snd() reads dev->hard_header_len multiple times while allocating and
constructing an skb. Device reconfiguration can change this value concurrently, for example through
bonding device type changes. For SOCK_RAW, packet_snd() can save a larger value in reserve and later
allocate headroom using a smaller value. Moving skb->data back by reserve then places it before skb->head,
and the following copy from userspace can attempt an out-of-bounds write. packet_sendmsg_spkt() has the
same issue because it calculates its reservation and header offset from separate reads before dropping the
RCU read lock to allocate the skb. Add LL_RESERVED_SPACE_EX() for callers that already saved a header
length. Read hard_header_len once in packet_snd() and use it for allocation and construction. In
packet_sendmsg_spkt(), preserve the allocation-time value through the device lookup retry. The separate
SOCK_DGRAM consistency problem between hard_header_len and header_ops->create is not addressed here.
(CVE-2026-74582)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19999.44.28 or later.

Plugin Details

Severity: High

ID: 470863

Version: Revision 1.3

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/3/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.56

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-74582

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/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: 8/21/2026

Reference Information

CVE: CVE-2026-74582

Detections

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