CVE-2022-49842

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

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: <TASK> 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 ... </TASK>

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

VendorProductVersions
LinuxLinux>= fb257897bf20c5f0e1df584bb5b874e811651263, < 41fad4f712e081acdfde8b59847f9f66eaf407a0; >= fb257897bf20c5f0e1df584bb5b874e811651263, < 90bbdf30a51e42378cb23a312005a022794b8e1e; >= fb257897bf20c5f0e1df584bb5b874e811651263, < a3365e62239dc064019a244bde5686ac18527c22; >= fb257897bf20c5f0e1df584bb5b874e811651263, < 2ec3f558db343b045a7c7419cdbaec266b8ac1a7; >= fb257897bf20c5f0e1df584bb5b874e811651263, < 8d21554ec7680e9585fb852d933203c3db60dad1; >= fb257897bf20c5f0e1df584bb5b874e811651263, < 34eee4189bcebbd5f6a2ff25ef0cb893ad33d51e; >= fb257897bf20c5f0e1df584bb5b874e811651263, < c5674bd073c0fd9f620ca550c5ff08d0d429bdd9; >= fb257897bf20c5f0e1df584bb5b874e811651263, < 6ec27c53886c8963729885bcf2dd996eba2767a7
LinuxLinux3.0

References

Timeline

Published
May 1, 2025
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2022-49842: High severity, CVSS 7.8 | Vulnix