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Unity Linux 20.1070a Security Update: kernel (UTSA-2026-005663)

medium Nessus Plugin ID 300995

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-2026-005663 advisory.

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

 blk-mq: fix possible memleak when register 'hctx' failed

 There's issue as follows when do fault injection test:
 unreferenced object 0xffff888132a9f400 (size 512):
 comm insmod, pid 308021, jiffies 4324277909 (age 509.733s) hex dump (first 32 bytes):
 00 00 00 00 00 00 00 00 08 f4 a9 32 81 88 ff ff ...........2....
 08 f4 a9 32 81 88 ff ff 00 00 00 00 00 00 00 00 ...2............
 backtrace:
 [<00000000e8952bb4>] kmalloc_node_trace+0x22/0xa0 [<00000000f9980e0f>] blk_mq_alloc_and_init_hctx+0x3f1/0x7e0 [<000000002e719efa>] blk_mq_realloc_hw_ctxs+0x1e6/0x230 [<000000004f1fda40>] blk_mq_init_allocated_queue+0x27e/0x910 [<00000000287123ec>] __blk_mq_alloc_disk+0x67/0xf0 [<00000000a2a34657>] 0xffffffffa2ad310f [<00000000b173f718>] 0xffffffffa2af824a [<0000000095a1dabb>] do_one_initcall+0x87/0x2a0 [<00000000f32fdf93>] do_init_module+0xdf/0x320 [<00000000cbe8541e>] load_module+0x3006/0x3390 [<0000000069ed1bdb>] __do_sys_finit_module+0x113/0x1b0 [<00000000a1a29ae8>] do_syscall_64+0x35/0x80 [<000000009cd878b0>] entry_SYSCALL_64_after_hwframe+0x46/0xb0

 Fault injection context as follows:
 kobject_add blk_mq_register_hctx blk_mq_sysfs_register blk_register_queue device_add_disk null_add_dev.part.0 [null_blk]

 As 'blk_mq_register_hctx' may already add some objects when failed halfway, but there isn't do fallback, caller don't know which objects add failed.
 To solve above issue just do fallback when add objects failed halfway in 'blk_mq_register_hctx'.

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?abf99d2c

http://www.nessus.org/u?ba386a42

https://nvd.nist.gov/vuln/detail/CVE-2022-50434

Plugin Details

Severity: Medium

ID: 300995

File Name: unity_linux_UTSA-2026-005663.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-2022-50434

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: 7/21/2021

Reference Information

CVE: CVE-2022-50434