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loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc//maps for exploitation.

Reference Links(if available):

  •[email protected]/message/PAP4TXEZ7J4EZQMQW5SIJMWXG7WZT3F7/
  •[email protected]/message/J7KSMIOQ4377CVTHMWNGNCWHMCRFRP2T/
  • CVSS Score (if available)

    v2: / HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C

    v3: / HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

    Links to Exploits(if available)

  • Available for Amazon Prime