Google: sys-kernel/csql-kernel-6_1, sys-kernel/csql-kernel-6_6, sys-kernel/lakitu-kernel-6_1, sys-kernel/lakitu-kernel-6_6, sys-kernel/lakitu-nc-kernel-6_6, sys-kernel/lakitu-vgpu-kernel-6_6, sys-kernel/tpusev-kernel-6_6: security update to 18613.731.2

high Tenable Cloud Security Plugin ID 466466

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/packet: reset the MAC header on
the packet-socket transmit path packet_parse_headers() resets the MAC header only for a SOCK_RAW frame
whose socket did not bind a protocol. A protocol-bound SOCK_RAW socket, any SOCK_DGRAM frame, and the
legacy SOCK_PACKET path therefore leave skb->mac_header unset here. For frames sent via __dev_queue_xmit()
this is harmless: it resets the MAC header unconditionally. But the packet-socket PACKET_QDISC_BYPASS path
uses dev_direct_xmit(), which does not, so the frame reaches ndo_start_xmit() with the MAC header unset. A
driver that reads eth_hdr(skb) on transmit then dereferences skb->head + (u16)~0, an out-of-bounds access
~64 KiB past the head -- the same class fixed for one consumer in commit f5089008f90c ("macsec: do not
read an unset MAC header in macsec_encrypt()"). packet_parse_headers() runs only on the transmit path,
where skb->data points at the start of the L2 header for every packet-socket type regardless of its
length: SOCK_RAW and SOCK_PACKET carry a user-supplied header and SOCK_DGRAM has one built by
dev_hard_header(). Reset the MAC header unconditionally, mirroring __dev_queue_xmit(), so the frame is
anchored on the bypass path too. Found by 0sec (https://0sec.ai) using automated source analysis; verified
against source and matched to the macsec KASAN report in f5089008f90c. Compile-tested. (CVE-2026-74667)

Solution

Update the sys-kernel/csql-kernel-6_1 library and its related packages to version 18613.731.2 or later.

Plugin Details

Severity: High

ID: 466466

Version: Revision 1.3

Type: Local

Family: Google COS Security Checks

Published: 10/2/2026

Updated: 10/3/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.15

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-2026-74667

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: 8/22/2026

Reference Information

CVE: CVE-2026-74667

Detections

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