CVE-2025-39892 ASoC: soc-core: care NULL dirver name on snd_soc_lookup_component_nolocked()
A null pointer dereference in the Linux kernel's ASoC core can cause a system crash during device unbinding.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-39892?
CVE-2025-39892 is a medium-severity vulnerability in Linux kernel, published on 1 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ASoC: soc-core: care NULL dirver name on snd_soc_lookup_component_nolocked()
soc-generic-dmaengine-pcm.c uses same dev for both CPU and Platform. In such case, CPU component driver might not have driver->name, then snd_soc_lookup_component_nolocked() will be NULL pointer access error. Care NULL driver name.
Call trace: strcmp from snd_soc_lookup_component_nolocked+0x64/0xa4 snd_soc_lookup_component_nolocked from snd_soc_unregister_component_by_driver+0x2c/0x44 snd_soc_unregister_component_by_driver from snd_dmaengine_pcm_unregister+0x28/0x64 snd_dmaengine_pcm_unregister from devres_release_all+0x98/0xfc devres_release_all from device_unbind_cleanup+0xc/0x60 device_unbind_cleanup from really_probe+0x220/0x2c8 really_probe from __driver_probe_device+0x88/0x1a0 __driver_probe_device from driver_probe_device+0x30/0x110 driver_probe_device from __driver_attach+0x90/0x178 __driver_attach from bus_for_each_dev+0x7c/0xcc bus_for_each_dev from bus_add_driver+0xcc/0x1ec bus_add_driver from driver_register+0x80/0x11c driver_register from do_one_initcall+0x58/0x23c do_one_initcall from kernel_init_freeable+0x198/0x1f4 kernel_init_freeable from kernel_init+0x1c/0x12c kernel_init from ret_from_fork+0x14/0x28
Weakness: CWE-476
Which versions are affected by CVE-2025-39892?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-39892?
Apply the vendor's patch.
Is CVE-2025-39892 being exploited?
There is no known exploitation of CVE-2025-39892 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-39892, DEBIAN-CVE-2025-39892, GHSA-6mp7-7x6g-jprp, UBUNTU-CVE-2025-39892.