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Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2025-992311)

medium Nessus Plugin ID 280208

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-2025-992311 advisory.

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

 nbd: Fix hung when signal interrupts nbd_start_device_ioctl()

 syzbot reported hung task [1]. The following program is a simplified version of the reproducer:

 int main(void) { int sv[2], fd;

 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) < 0) return 1;
 if ((fd = open(/dev/nbd0, 0)) < 0) return 1;
 if (ioctl(fd, NBD_SET_SIZE_BLOCKS, 0x81) < 0) return 1;
 if (ioctl(fd, NBD_SET_SOCK, sv[0]) < 0) return 1;
 if (ioctl(fd, NBD_DO_IT) < 0) return 1;
 return 0;
 }

 When signal interrupt nbd_start_device_ioctl() waiting the condition atomic_read(&config->recv_threads) == 0, the task can hung because it waits the completion of the inflight IOs.

 This patch fixes the issue by clearing queue, not just shutdown, when signal interrupt nbd_start_device_ioctl().

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?0ba42a96

http://www.nessus.org/u?d1a2dc45

https://nvd.nist.gov/vuln/detail/CVE-2022-50314

Plugin Details

Severity: Medium

ID: 280208

File Name: unity_linux_UTSA-2025-992311.nasl

Version: 1.1

Type: local

Published: 12/30/2025

Updated: 12/30/2025

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-2022-50314

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: 12/30/2025

Vulnerability Publication Date: 9/4/2021

Reference Information

CVE: CVE-2022-50314