Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Fix setup list UAF on proc write error snd_pcm_oss_proc_write() links a newly allocated setup entry into the OSS setup list before duplicating the task name. If the task-name allocation fails, the error path frees the already linked entry and leaves setup_list pointing at freed memory. A later OSS device open can then walk the stale list entry in snd_pcm_oss_look_for_setup() and dereference freed memory. Allocate the task name and initialize the setup entry before publishing the entry on setup_list. Also fetch the initial proc read iterator only after taking setup_mutex, so all setup_list traversal follows the same list lifetime rules.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
060d77b9c04acd7aef60790398a53f731db8c8fe to < d9df965284abde27ba6bfbdfc8407697cf6802f1affected060d77b9c04acd7aef60790398a53f731db8c8fe to < 8be4efd0dc0093eb7a02ad1aac936bca2a1f04ceaffected060d77b9c04acd7aef60790398a53f731db8c8fe to < e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3caffected060d77b9c04acd7aef60790398a53f731db8c8fe to < be387230dc22d870afd0e5d35912b07c2bc323bdaffected060d77b9c04acd7aef60790398a53f731db8c8fe to < 4cc54bdd54b337e77115be5b55577d1c58608eaeaffected
Linux Linux
Default version status: affected
2.6.17affected0 to < 2.6.17unaffected6.6.160 to ≤ 6.6.*unaffected6.12.93 to ≤ 6.12.*unaffected6.18.35 to ≤ 6.18.*unaffected7.0.12 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/d9df965284abde27ba6bfbdfc8407697cf6802f1 ↗
- https://git.kernel.org/stable/c/8be4efd0dc0093eb7a02ad1aac936bca2a1f04ce ↗
- https://git.kernel.org/stable/c/e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c ↗
- https://git.kernel.org/stable/c/be387230dc22d870afd0e5d35912b07c2bc323bd ↗
- https://git.kernel.org/stable/c/4cc54bdd54b337e77115be5b55577d1c58608eae ↗