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

critical Tenable Self-Hosted Container Security Plugin ID 470589

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: fix skb length accounting after
generic XDP frag adjustment Generic XDP exposes non-linear skb fragments through an xdp_buff. If an XDP
program adjusts the fragment area, bpf_prog_run_generic_xdp() copies xdp_frags_size back to skb->data_len
but leaves skb->len containing the old fragment contribution. After a fragment shrink, this makes
skb_headlen() larger than the actual linear area. In the reproduced UDP receive path,
__skb_datagram_iter() copied 1024 bytes past the actual linear tail to userspace, starting at struct
skb_shared_info. The copied bytes included the affected skb's nr_frags, xdp_frags_size and a kernel
pointer from skb_shinfo(skb)->frags[0]. Real packet data was displaced by the same amount and truncated at
the end. Subtract the old data_len before replacing it and add the new data_len afterwards, keeping
skb->len and skb->data_len synchronized. A 60000-byte UDP datagram on a veth pair with MTU 64000 was
shortened by 1024 bytes from its fragment area. Before the fix, all 10 runs produced corrupted payloads.
After the fix, all 10 runs matched the expected payload exactly. (CVE-2026-74665)

Solution

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

Plugin Details

Severity: Critical

ID: 470589

Version: Revision 1.5

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: 4.3

Percentile: 53.51

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

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

CVSS Score Source: CVE-2026-74665

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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-2026-74665

Detections

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