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 19506.224.7

critical Tenable Cloud Security Plugin ID 469963

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: lib/scatterlist: fix length
calculations in extract_kvec_to_sg Patch series "Fix bugs in extract_iter_to_sg()", v3. Fix bugs in the
kvec and user variants of extract_iter_to_sg. This series is growing due to useful remarks made by
sashiko.dev. The main bugs are: - The length for an sglist entry when extracting from a kvec can exceed
the number of bytes in the page. This is obviously not intended. - When extracting a user buffer the
sglist is temporarily used as a scratch buffer for extracted page pointers. If the sglist already contains
some elements this scratch buffer could overlap with existing entries in the sglist. The series adds test
cases to the kunit_iov_iter test that demonstrate all of these bugs. Additionally, there is a memory leak
fix for the test itself. The bugs were orignally introduced into kernel v6.3 where the function lived in
fs/netfs/iterator.c. It was later moved to lib/scatterlist.c in v6.5. Thus the actual fix is only marked
for backports to v6.5+. This patch (of 5): When extracting from a kvec to a scatterlist, do not cross page
boundaries. The required length was already calculated but not used as intended. Adjust the copied length
if the loop runs out of sglist entries without extracting everything. While there, return immediately from
extract_iter_to_sg if there are no sglist entries at all. A subsequent commit will add kunit test cases
that demonstrate that the patch is necessary. (CVE-2026-46289)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.224.7 or later.

Plugin Details

Severity: Critical

ID: 469963

Version: Revision 1.4

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: 58.09

Vendor

Vendor Severity: CRITICAL

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-2026-46289

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/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: 5/26/2026

Reference Information

CVE: CVE-2026-46289

Detections

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