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 19506.448.8

medium Tenable Cloud Security Plugin ID 469688

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: vsock/virtio: fix zerocopy completion
 for multi-skb sends When a large message is fragmented into multiple skbs, the zerocopy uarg is only
 allocated and attached to the last skb in the loop. Non-final skbs carry pinned user pages with no
 completion tracking, so the kernel has no way to notify userspace when those pages are safe to reuse. If
 the loop breaks early the uarg is never allocated at all, leaking pinned pages with no completion
 notification. Fix this by following the approach used by TCP: allocate the zerocopy uarg (if not provided
 by the caller) before the send loop and attach it to every skb via skb_zcopy_set(), which takes a
 reference per skb. Each skb's completion properly decrements the refcount, and the notification only fires
 after the last skb is freed. On failure, if no data was sent, the uarg is cleanly aborted via
 net_zcopy_put_abort(). This issue was initially discovered by sashiko while reviewing commit 1cb36e252211
 ("vsock/virtio: fix MSG_ZEROCOPY pinned-pages accounting") but was pre-existing. (CVE-2026-53365)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.448.8 or later.

See Also

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

Plugin Details

Severity: Medium

ID: 469688

Version: Revision 1.3

Type: Local

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: 5

Percentile: 93.27

Vendor

Vendor Severity: MEDIUM

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.8

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

CVSS Score Source: CVE-2026-53365

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5.1

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

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 6/22/2026

Exploitable With

Core Impact

Reference Information

CVE: CVE-2026-53365