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Unity Linux 20.1070a Security Update: kernel (UTSA-2026-013038)

medium Nessus Plugin ID 307711

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-2026-013038 advisory.

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

 regmap: slimbus: fix bus_context pointer in regmap init calls

 Commit 4e65bda8273c (ASoC: wcd934x: fix error handling in wcd934x_codec_parse_data()) revealed the problem in the slimbus regmap.
 That commit breaks audio playback, for instance, on sdm845 Thundercomm Dragonboard 845c board:

 Unable to handle kernel paging request at virtual address ffff8000847cbad4 ...
 CPU: 5 UID: 0 PID: 776 Comm: aplay Not tainted 6.18.0-rc1-00028-g7ea30958b305 #11 PREEMPT Hardware name: Thundercomm Dragonboard 845c (DT) ...
 Call trace:
 slim_xfer_msg+0x24/0x1ac [slimbus] (P) slim_read+0x48/0x74 [slimbus] regmap_slimbus_read+0x18/0x24 [regmap_slimbus]
 _regmap_raw_read+0xe8/0x174
 _regmap_bus_read+0x44/0x80
 _regmap_read+0x60/0xd8
 _regmap_update_bits+0xf4/0x140
 _regmap_select_page+0xa8/0x124
 _regmap_raw_write_impl+0x3b8/0x65c
 _regmap_bus_raw_write+0x60/0x80
 _regmap_write+0x58/0xc0 regmap_write+0x4c/0x80 wcd934x_hw_params+0x494/0x8b8 [snd_soc_wcd934x] snd_soc_dai_hw_params+0x3c/0x7c [snd_soc_core]
 __soc_pcm_hw_params+0x22c/0x634 [snd_soc_core] dpcm_be_dai_hw_params+0x1d4/0x38c [snd_soc_core] dpcm_fe_dai_hw_params+0x9c/0x17c [snd_soc_core] snd_pcm_hw_params+0x124/0x464 [snd_pcm] snd_pcm_common_ioctl+0x110c/0x1820 [snd_pcm] snd_pcm_ioctl+0x34/0x4c [snd_pcm]
 __arm64_sys_ioctl+0xac/0x104 invoke_syscall+0x48/0x104 el0_svc_common.constprop.0+0x40/0xe0 do_el0_svc+0x1c/0x28 el0_svc+0x34/0xec el0t_64_sync_handler+0xa0/0xf0 el0t_64_sync+0x198/0x19c

 The __devm_regmap_init_slimbus() started to be used instead of
 __regmap_init_slimbus() after the commit mentioned above and turns out the incorrect bus_context pointer (3rd argument) was used in
 __devm_regmap_init_slimbus(). It should be just slimbus (which is equal to &slimbus->dev). Correct it. The wcd934x codec seems to be the only or the first user of devm_regmap_init_slimbus() but we should fix it till the point where __devm_regmap_init_slimbus() was introduced therefore two Fixes tags.

 While at this, also correct the same argument in __regmap_init_slimbus().

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?4c6a7055

http://www.nessus.org/u?86e88d6b

https://nvd.nist.gov/vuln/detail/CVE-2025-40317

Plugin Details

Severity: Medium

ID: 307711

File Name: unity_linux_UTSA-2026-013038.nasl

Version: 1.1

Type: Local

Published: 4/21/2026

Updated: 4/21/2026

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-2025-40317

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: 4/21/2026

Vulnerability Publication Date: 12/8/2025

Reference Information

CVE: CVE-2025-40317