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Unity Linux 20.1070a Security Update: kernel (UTSA-2026-005793)

medium Nessus Plugin ID 300784

Synopsis

The Unity Linux host is missing one or more security updates.

Description

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005793 advisory.

 In the Linux kernel, the following vulnerability has been resolved:

 drivers/rapidio/rio_cm.c: prevent possible heap overwrite

 In

 riocm_cdev_ioctl(RIO_CM_CHAN_SEND)
 -> cm_chan_msg_send()
 -> riocm_ch_send()

 cm_chan_msg_send() checks that userspace didn't send too much data but riocm_ch_send() failed to check that userspace sent sufficient data. The result is that riocm_ch_send() can write to fields in the rio_ch_chan_hdr which were outside the bounds of the space which cm_chan_msg_send() allocated.

 Address this by teaching riocm_ch_send() to check that the entire rio_ch_chan_hdr was copied in from userspace.

Tenable has extracted the preceding description block directly from the Unity Linux 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 kernel package.

See Also

http://www.nessus.org/u?c1935a7d

http://www.nessus.org/u?278dc01c

https://nvd.nist.gov/vuln/detail/CVE-2025-38090

Plugin Details

Severity: Medium

ID: 300784

File Name: unity_linux_UTSA-2026-005793.nasl

Version: 1.1

Type: local

Published: 3/5/2026

Updated: 3/5/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2025-38090

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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:U/RL:O/RC:C

Vulnerability Information

Required KB Items: Host/local_checks_enabled, Host/UOS-Server/release, Host/UOS-Server/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 3/3/2026

Vulnerability Publication Date: 6/30/2025

Reference Information

CVE: CVE-2025-38090