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Unity Linux 20.1070e Security Update: kernel (UTSA-2025-986284)

medium Nessus Plugin ID 267975

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-2025-986284 advisory.

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

 md: fix resync softlockup when bitmap size is less than array size

 Is is reported that for dm-raid10, lvextend + lvchange --syncaction will trigger following softlockup:

 kernel:watchdog: BUG: soft lockup - CPU#3 stuck for 26s! [mdX_resync:6976] CPU: 7 PID: 3588 Comm: mdX_resync Kdump: loaded Not tainted 6.9.0-rc4-next-20240419 #1 RIP: 0010:_raw_spin_unlock_irq+0x13/0x30 Call Trace:
 <TASK> md_bitmap_start_sync+0x6b/0xf0 raid10_sync_request+0x25c/0x1b40 [raid10] md_do_sync+0x64b/0x1020 md_thread+0xa7/0x170 kthread+0xcf/0x100 ret_from_fork+0x30/0x50 ret_from_fork_asm+0x1a/0x30

 And the detailed process is as follows:

 md_do_sync j = mddev->resync_min while (j < max_sectors) sectors = raid10_sync_request(mddev, j, &skipped) if (!md_bitmap_start_sync(..., &sync_blocks)) // md_bitmap_start_sync set sync_blocks to 0 return sync_blocks + sectors_skippe;
 // sectors = 0;
 j += sectors;
 // j never change

 Root cause is that commit 301867b1c168 (md/raid10: check slab-out-of-bounds in md_bitmap_get_counter) return early from md_bitmap_get_counter(), without setting returned blocks.

 Fix this problem by always set returned blocks from md_bitmap_get_counter(), as it used to be.

 Noted that this patch just fix the softlockup problem in kernel, the case that bitmap size doesn't match array size still need to be fixed.

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.

See Also

http://www.nessus.org/u?e9b7375f

http://www.nessus.org/u?07185ee9

https://nvd.nist.gov/vuln/detail/CVE-2024-38598

Plugin Details

Severity: Medium

ID: 267975

File Name: unity_linux_UTSA-2025-986284.nasl

Version: 1.1

Type: local

Published: 10/7/2025

Updated: 10/7/2025

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-2024-38598

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: 9/22/2025

Vulnerability Publication Date: 12/12/2023

Reference Information

CVE: CVE-2024-38598