CVE-2023-52616 Information

Description

In the Linux kernel the following vulnerability has been resolved:

crypto: lib/mpi - Fix unexpected pointer access in mpi_ec_init

When the mpi_ec_ctx structure is initialized some fields are not cleared causing a crash when referencing the field when the structure was released. Initially this issue was ignored because memory for mpi_ec_ctx is allocated with the __GFP_ZERO flag. For example this error will be triggered when calculating the Za value for SM2 separately.

Reference

https://git.kernel.org/stable/c/0c3687822259a7628c85cd21a3445cbe3c367165 https://git.kernel.org/stable/c/2bb86817b33c9d704e127f92b838035a72c315b6 https://git.kernel.org/stable/c/bb44477d4506e52785693a39f03cdc6a2c5e8598 https://git.kernel.org/stable/c/7ebf812b7019fd2d4d5a7ca45ef4bf3a6f4bda0a https://git.kernel.org/stable/c/7abdfd45a650c714d5ebab564bb1b988f14d9b49 https://git.kernel.org/stable/c/ba3c5574203034781ac4231acf117da917efcd2a