CVE-2022-49524: media: pci: cx23885: Fix the error handling in cx23885_initdev()
First published: Wed Feb 26 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: media: pci: cx23885: Fix the error handling in cx23885_initdev() When the driver fails to call the dma_set_mask(), the driver will get the following splat: [ 55.853884] BUG: KASAN: use-after-free in __process_removed_driver+0x3c/0x240 [ 55.854486] Read of size 8 at addr ffff88810de60408 by task modprobe/590 [ 55.856822] Call Trace: [ 55.860327] __process_removed_driver+0x3c/0x240 [ 55.861347] bus_for_each_dev+0x102/0x160 [ 55.861681] i2c_del_driver+0x2f/0x50 This is because the driver has initialized the i2c related resources in cx23885_dev_setup() but not released them in error handling, fix this bug by modifying the error path that jumps after failing to call the dma_set_mask().
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | <4.14.283 | |
| Linux Kernel | >=4.15<4.19.247 | |
| Linux Kernel | >=4.20<5.4.198 | |
| Linux Kernel | >=5.5<5.10.121 | |
| Linux Kernel | >=5.11<5.15.46 | |
| Linux Kernel | >=5.16<5.17.14 | |
| Linux Kernel | >=5.18<5.18.3 |
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Reference Links
- https://git.kernel.org/stable/c/6041d1a0365baa729b6adfb6ed5386d9388018db
- https://git.kernel.org/stable/c/7b9978e1c94e569d65a0e7e719abb9340f5db4a0
- https://git.kernel.org/stable/c/fa636e9ee4442215cd9a2e079cd5a8e1fe0cb8ba
- https://git.kernel.org/stable/c/ca17e7a532d1a55466cc007b3f4d319541a27493
- https://git.kernel.org/stable/c/98106f100f50c487469903b9cf6d966785fc9cc3
- https://git.kernel.org/stable/c/86bd6a579c6c60547706cabf299cd2c9feab3332
- https://git.kernel.org/stable/c/453514a874c78df1e7804e6e3aaa60c8d8deb6a8
- https://git.kernel.org/stable/c/e8123311cf06d7dae71e8c5fe78e0510d20cd30b
Frequently Asked Questions
What is the severity of CVE-2022-49524?
CVE-2022-49524 is classified as a medium severity vulnerability affecting the Linux kernel.
How do I fix CVE-2022-49524?
To mitigate CVE-2022-49524, update the Linux kernel to a version that includes the fix.
Which versions of the Linux kernel are affected by CVE-2022-49524?
CVE-2022-49524 affects multiple versions of the Linux kernel, including those from 4.14.283 up to 5.18.3.
What type of vulnerability is CVE-2022-49524?
CVE-2022-49524 is a use-after-free vulnerability detected in the Linux kernel's media subsystem.
What components of the Linux kernel does CVE-2022-49524 impact?
CVE-2022-49524 impacts the PCI media driver related to the cx23885 device.
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