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Unity Linux 20.1050e / 20.1060e Security Update: kernel (UTSA-2026-013402)

medium Nessus Plugin ID 309172

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-2026-013402 advisory.

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

 nilfs2: prevent use of deleted inode

 syzbot reported a WARNING in nilfs_rmdir. [1]

 Because the inode bitmap is corrupted, an inode with an inode number that should exist as a .nilfs file was reassigned by nilfs_mkdir for file0, causing an inode duplication during execution. And this causes an underflow of i_nlink in rmdir operations.

 The inode is used twice by the same task to unmount and remove directories .nilfs and file0, it trigger warning in nilfs_rmdir.

 Avoid to this issue, check i_nlink in nilfs_iget(), if it is 0, it means that this inode has been deleted, and iput is executed to reclaim it.

 [1] WARNING: CPU: 1 PID: 5824 at fs/inode.c:407 drop_nlink+0xc4/0x110 fs/inode.c:407 ...
 Call Trace:
 <TASK> nilfs_rmdir+0x1b0/0x250 fs/nilfs2/namei.c:342 vfs_rmdir+0x3a3/0x510 fs/namei.c:4394 do_rmdir+0x3b5/0x580 fs/namei.c:4453
 __do_sys_rmdir fs/namei.c:4472 [inline]
 __se_sys_rmdir fs/namei.c:4470 [inline]
 __x64_sys_rmdir+0x47/0x50 fs/namei.c:4470 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f

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?4a1b7ca5

http://www.nessus.org/u?c88be2df

https://nvd.nist.gov/vuln/detail/CVE-2024-53690

Plugin Details

Severity: Medium

ID: 309172

File Name: unity_linux_UTSA-2026-013402.nasl

Version: 1.1

Type: Local

Published: 4/22/2026

Updated: 4/22/2026

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-2024-53690

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: 4/22/2026

Vulnerability Publication Date: 1/11/2025

Reference Information

CVE: CVE-2024-53690