2023-06-28 11:08:54
PUBLISHED
A time-of-check to time-of-use issue exists in io_uring subsystems IORING_OP_CLOSE operation in the Linux kernels versions 5.6 - 5.11 (inclusive), which allows a local user to elevate their privileges to root. Introduced in b5dba59e0cf7e2cc4d3b3b1ac5fe81ddf21959eb, patched in 9eac1904d3364254d622bf2c771c4f85cd435fc2, backported to stable in 788d0824269bef539fe31a785b1517882eafed93.