LinuxVULNRICHMENT:CVE-2023-52445CVE-2023-52445 media: pvrusb2: fix use after free on context disconnection
In the Linux kernel, the following vulnerability has been resolved:
media: pvrusb2: fix use after free on context disconnection
Upon module load, a kthread is created targeting the
pvr2_context_thread_func function, which may call pvr2_context_destroy
and thus call kfree() on the context object. However, that might happen
before the usb hub_event handler is able to notify the driver. This
patch adds a sanity check before the invalid read reported by syzbot,
within the context disconnection call stack.
References
git.kernel.org/stable/c/2cf0005d315549b8d2b940ff96a66c2a889aa795
git.kernel.org/stable/c/30773ea47d41773f9611ffb4ebc9bda9d19a9e7e
git.kernel.org/stable/c/3233d8bf7893550045682192cb227af7fa3defeb
git.kernel.org/stable/c/437b5f57732bb4cc32cc9f8895d2010ee9ff521c
git.kernel.org/stable/c/47aa8fcd5e8b5563af4042a00f25ba89bef8f33d
git.kernel.org/stable/c/ded85b0c0edd8f45fec88783d7555a5b982449c1
git.kernel.org/stable/c/ec3634ebe23fc3c44ebc67c6d25917300bc68c08
git.kernel.org/stable/c/ec36c134dd020d28e312c2f1766f85525e747aab
lists.debian.org/debian-lts-announce/2024/06/msg00016.html
lists.debian.org/debian-lts-announce/2024/06/msg00020.html
Related
AI Score
Confidence
Low
SSVC
Exploitation
none
Automatable
no
Technical Impact
partial