Google: sys-kernel/csql-kernel-6_1, sys-kernel/lakitu-kernel-6_1: security update to 18244.448.43

high Tenable Self-Hosted Container Security Plugin ID 450937

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: perf/core: Prevent VMA split of buffer
mappings The perf mmap code is careful about mmap()'ing the user page with the ringbuffer and additionally
the auxiliary buffer, when the event supports it. Once the first mapping is established, subsequent
mapping have to use the same offset and the same size in both cases. The reference counting for the
ringbuffer and the auxiliary buffer depends on this being correct. Though perf does not prevent that a
related mapping is split via mmap(2), munmap(2) or mremap(2). A split of a VMA results in perf_mmap_open()
calls, which take reference counts, but then the subsequent perf_mmap_close() calls are not longer
fulfilling the offset and size checks. This leads to reference count leaks. As perf already has the
requirement for subsequent mappings to match the initial mapping, the obvious consequence is that VMA
splits, caused by resizing of a mapping or partial unmapping, have to be prevented. Implement the
vm_operations_struct::may_split() callback and return unconditionally -EINVAL. That ensures that the
mapping offsets and sizes cannot be changed after the fact. Remapping to a different fixed address with
the same size is still possible as it takes the references for the new mapping and drops those of the old
mapping. (CVE-2025-38563)

Solution

Update the sys-kernel/csql-kernel-6_1 library and its related packages to version 18244.448.43 or later.

Plugin Details

Severity: High

ID: 450937

Version: Revision 1.3

Type: Local

Family: Google COS Security Checks

Published: 10/1/2026

Updated: 10/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 97.18

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2025-38563

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Reference Information

CVE: CVE-2025-38563

Detections

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