In the Linux kernel, the following vulnerability has been resolved: ALSA: mixer: oss: Add card disconnect checkpoints ALSA OSS mixer layer calls the kcontrol ops rather individually, and pending calls might be not always caught at disconnecting the device. For avoiding the potential UAF scenarios, add sanity checks of the card disconnection at each entry point of OSS mixer accesses. The rwsem is taken just before that check, hence the rest context should be covered by that properly.
https://git.kernel.org/stable/c/e6645e625480cdf1079a4265f758d13b70721029
https://git.kernel.org/stable/c/ae583f113d15fa97e5234133c20d09f8e6214e47
https://git.kernel.org/stable/c/8c097cf736993454acf3f711a3b376d6c7ad8965
https://git.kernel.org/stable/c/084d5d44418148662365eced3e126ad1a81ee3e2