Executive Summary

Informations
Name CVE-2022-49842 First vendor Publication 2025-05-01
Vendor Cve Last vendor Modification 2025-05-07

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 7.8
Base Score 7.8 Environmental Score 7.8
impact SubScore 5.9 Temporal Score 7.8
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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

ASoC: core: Fix use-after-free in snd_soc_exit()

KASAN reports a use-after-free:

BUG: KASAN: use-after-free in device_del+0xb5b/0xc60 Read of size 8 at addr ffff888008655050 by task rmmod/387 CPU: 2 PID: 387 Comm: rmmod Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) Call Trace: dump_stack_lvl+0x79/0x9a print_report+0x17f/0x47b kasan_report+0xbb/0xf0 device_del+0xb5b/0xc60 platform_device_del.part.0+0x24/0x200 platform_device_unregister+0x2e/0x40 snd_soc_exit+0xa/0x22 [snd_soc_core] __do_sys_delete_module.constprop.0+0x34f/0x5b0 do_syscall_64+0x3a/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd ...

It's bacause in snd_soc_init(), snd_soc_util_init() is possble to fail, but its ret is ignored, which makes soc_dummy_dev unregistered twice.

snd_soc_init()
snd_soc_util_init()
platform_device_register_simple(soc_dummy_dev)
platform_driver_register() # fail
platform_device_unregister(soc_dummy_dev)
platform_driver_register() # success ... snd_soc_exit()
snd_soc_util_exit()
# soc_dummy_dev will be unregistered for second time

To fix it, handle error and stop snd_soc_init() when util_init() fail. Also clean debugfs when util_init() or driver_register() fail.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-49842

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-416 Use After Free

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 8
Os 3565

Sources (Detail)

https://git.kernel.org/stable/c/2ec3f558db343b045a7c7419cdbaec266b8ac1a7
https://git.kernel.org/stable/c/34eee4189bcebbd5f6a2ff25ef0cb893ad33d51e
https://git.kernel.org/stable/c/41fad4f712e081acdfde8b59847f9f66eaf407a0
https://git.kernel.org/stable/c/6ec27c53886c8963729885bcf2dd996eba2767a7
https://git.kernel.org/stable/c/8d21554ec7680e9585fb852d933203c3db60dad1
https://git.kernel.org/stable/c/90bbdf30a51e42378cb23a312005a022794b8e1e
https://git.kernel.org/stable/c/a3365e62239dc064019a244bde5686ac18527c22
https://git.kernel.org/stable/c/c5674bd073c0fd9f620ca550c5ff08d0d429bdd9
Source Url

Alert History

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0
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Date Informations
2025-06-24 02:14:58
  • Multiple Updates
2025-05-27 13:23:58
  • Multiple Updates
2025-05-27 02:12:07
  • First insertion