# CVE-2022-49842: linux: In the Linux kernel, the following vulnerability has been resolved:  ASoC: core: Fix use-after-free in snd_soc_exit()...

CVE-2022-49842 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49842, released May 1, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-49842
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 1, 2025

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.10-1 | [DEBIAN-CVE-2022-49842](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49842.md) | May 1, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.10-1 | [DEBIAN-CVE-2022-49842](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49842.md) | May 1, 2025 |
| Linux | linux Debian 14 | 6.0.10-1 | [DEBIAN-CVE-2022-49842](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49842.md) | May 1, 2025 |

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