In the Linux kernel, the following vulnerability has been resolved:

cachefiles: add consistency check for copen/cread

This prevents malicious processes from completing random copen/cread
requests and crashing the system. Added checks are listed below:

  * Generic, copen can only complete open requests, and cread can only
    complete read requests.
  * For copen, ondemand_id must not be 0, because this indicates that the
    request has not been read by the daemon.
  * For cread, the object corresponding to fd and req should be the same.

kernel.org https://git.kernel.org/stable/c/36d845ccd7bf527110a65fe953886a176c209539 [No types assigned]

kernel.org https://git.kernel.org/stable/c/3b744884c0431b5a62c92900e64bfd0ed61e8e2a [No types assigned]

kernel.org https://git.kernel.org/stable/c/8aaa6c5dd2940ab934d6cd296175f43dbb32b34a [No types assigned]

kernel.org https://git.kernel.org/stable/c/a26dc49df37e996876f50a0210039b2d211fdd6f [No types assigned]