Description

In the Linux kernel, the following vulnerability has been resolved: HID: hidraw: fix data race on device refcount The hidraw_open() function increments the hidraw device reference counter. The counter has no dedicated synchronization mechanism, resulting in a potential data race when concurrently opening a device. The race is a regression introduced by commit 8590222e4b02 ("HID: hidraw: Replace hidraw device table mutex with a rwsem"). While minors_rwsem is intended to protect the hidraw_table itself, by instead acquiring the lock for writing, the reference counter is also protected. This is symmetrical to hidraw_release().

References 4

• git.kernel.org https://git.kernel.org/stable/c/05b47034e2488c2924e5c032e20a1979d012b5b5
• git.kernel.org https://git.kernel.org/stable/c/879e79c3aead41b8aa2e91164354b30bd1c4ef3b
• git.kernel.org https://git.kernel.org/stable/c/944ee77dc6ec7b0afd8ec70ffc418b238c92f12b
• git.kernel.org https://git.kernel.org/stable/c/ff348eabd97577da974d3db7038857f28c61d2bd

Remediation