FreeBSD : FreeBSD -- Arm CPU errata may bypass page table permission changes (438b0278-6474-11f1-958d-bc241121aa0a)

critical Nessus Plugin ID 320475

Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 438b0278-6474-11f1-958d-bc241121aa0a advisory.

Some Arm CPUs have errata where the ordering of stores and the TLBI+DSB sequence may be incorrect. If one CPU stores to a virtual address while another CPU invalidates the translation for that address, the second CPU's TLBI+DSB may complete before the first CPU's store has been globally observed.
This erratum may allow software to write to a previously writable location after the page table is modified to forbid writes to that location. Consequently this may allow software to write to memory owned by a higher exception level, possibly allowing software to escalate privilege to that higher exception level.

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 320475

File Name: freebsd_pkg_438b0278647411f1958dbc241121aa0a.nasl

Version: 1.1

Type: Local

Family: FreeBSD Local Security Checks

Published: 6/11/2026

Updated: 6/11/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

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-2025-10263

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

CPE: p-cpe:/a:freebsd:freebsd:freebsd-kernel, cpe:/o:freebsd:freebsd

Required KB Items: Settings/ParanoidReport, Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 6/10/2026

Vulnerability Publication Date: 6/9/2026

Reference Information

CVE: CVE-2025-10263

Detections

Analytics