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Unity Linux 20.1070e Security Update: kernel (UTSA-2025-990775)

medium Nessus Plugin ID 275026

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-2025-990775 advisory.

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

 net/smc: fix NULL sndbuf_desc in smc_cdc_tx_handler()

 When performing a stress test on SMC-R by rmmod mlx5_ib driver during the wrk/nginx test, we found that there is a probability of triggering a panic while terminating all link groups.

 This issue dues to the race between smc_smcr_terminate_all() and smc_buf_create().

 smc_smcr_terminate_all

 smc_buf_create /* init */ conn->sndbuf_desc = NULL;
 ...

 __smc_lgr_terminate smc_conn_kill smc_close_abort smc_cdc_get_slot_and_msg_send

 __softirqentry_text_start smc_wr_tx_process_cqe smc_cdc_tx_handler READ(conn->sndbuf_desc->len);
 /* panic dues to NULL sndbuf_desc */

 conn->sndbuf_desc = xxx;

 This patch tries to fix the issue by always to check the sndbuf_desc before send any cdc msg, to make sure that no null pointer is seen during cqe processing.

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?5a9550a7

http://www.nessus.org/u?3c57e85b

https://nvd.nist.gov/vuln/detail/CVE-2023-53110

Plugin Details

Severity: Medium

ID: 275026

File Name: unity_linux_UTSA-2025-990775.nasl

Version: 1.1

Type: local

Published: 11/12/2025

Updated: 11/12/2025

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-2023-53110

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/cpu, Host/UOS-Server/release, Host/UOS-Server/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 11/12/2025

Vulnerability Publication Date: 11/14/2023

Reference Information

CVE: CVE-2023-53110