CVE-2026-89741

Not enough EPSS history yet.

In the Linux kernel, the following vulnerability has been resolved: Revert "media: v4l2-dev: fix error handling in __video_register_device()" This reverts commit 2a934fdb01db6458288fc9386d3d8ceba6dd551a. The intentions of that patch were good, but it doesn't work. The idea is that if device_register fails, you have to do a put_device to let the ref counter release resources. However, the V4L2 API says that if video_register_device() fails, then you have to call video_device_release(), which kfree()s the video_device struct. But the put_device() will already have freed the struct, so you end up in a double-free scenario. There is not really a good way of fixing this without breaking video_register_device() into two parts, one that initializes everything, and one that does the actual device_register, and then converting all V4L2 drivers to this new model. That is a massive job, and it is very unlikely that device_register will fail. So rather than ending up in a double-free scenario, just revert this patch, and in that case we'll have a small memory leak. Which is a lot more robust.

• git.kernel.orghttps://git.kernel.org/stable/c/712ca1cf756de2557a116e0df55791bac0c9f99e
• git.kernel.orghttps://git.kernel.org/stable/c/aad08b5f67d2a8116e1a00bce2611c1513b10bce
• git.kernel.orghttps://git.kernel.org/stable/c/ce792b94e03882108019ba996c1a7c4d4e09be2c
• git.kernel.orghttps://git.kernel.org/stable/c/e7600f5cee5de14065f950807931d6e6d40fb2d7

No related CVEs by CWE or product.