Detections
Analytics

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 19506.505.8

high Tenable Self-Hosted Container Security Plugin ID 472734

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: tun: bound receive headroom
 tun_get_user() uses tun->align both as skb headroom and when choosing how much packet data to keep linear.
 OVS can propagate an oversized headroom request from another port to TUN or TAP. When align is larger than
 the usable space in a one-page skb head, SKB_MAX_HEAD(align) underflows and the result becomes negative
 when stored in good_linear. That value later wraps when assigned to the size_t linear variable, and
 tun_alloc_skb() can place skb->data outside the allocated head. Bound the headroom stored by TUN to the
 one-page skb-head budget and the largest non-sentinel 16-bit skb header offset. Leave one linear byte for
 raw TUN and a complete Ethernet header for TAP, including NET_IP_ALIGN. Also pull the raw-TUN protocol
 byte and the TAP Ethernet header before accessing them, so these checks remain safe for nonlinear skbs
 supplied by other allocation paths. (CVE-2026-81000)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.505.8 or later.

See Also

https://storage.googleapis.com/cos-oval-vulnerability-feed/cos-129.oval.xml.tar.gz

Plugin Details

Severity: High

ID: 472734

Version: Revision 1.1

Type: Local

Published: 10/5/2026

Updated: 10/5/2026

Risk Information

VPR

Risk Factor: High

Score: 7.9

Percentile: 99.35

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-81000

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 9/11/2026

Reference Information

CVE: CVE-2026-81000