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 19506.448.36

high Tenable Self-Hosted Container Security Plugin ID 469938

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: batman-adv: reject unrepresentable
multicast TVLV offsets The network and transport header fields in struct sk_buff are 16-bit offsets from
skb->head, and U16_MAX is reserved as the unset transport header value. batadv_tvlv_call_handler() sets
both fields from a received multicast TVLV without checking whether the TVLV end is representable. If the
end offset exceeds the field's range, skb_set_transport_header() truncates it so that the transport header
precedes the network header. The negative difference is then returned by skb_network_header_len() as a
large u32. batadv_mcast_forw_packet() consequently accepts an oversized multicast tracker and accesses
memory beyond the skb data. Add skb_set_transport_header_careful(), an offset-aware counterpart to
skb_reset_transport_header_careful(), which validates the final head-relative offset before assigning it.
Use the new helper in batadv_tvlv_call_handler() and reject unrepresentable TVLVs before setting the
network header. (CVE-2026-80839)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.448.36 or later.

Plugin Details

Severity: High

ID: 469938

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: 58.36

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-2026-80839

CVSS v3

Risk Factor: High

Base Score: 8.4

Temporal Score: 7.3

Vector: CVSS:3.0/AV:L/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: 9/4/2026

Reference Information

CVE: CVE-2026-80839

Detections

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