CVE-2021-47285 Information

Description

In the Linux kernel the following vulnerability has been resolved:

net/nfc/rawsock.c: fix a permission check bug

The function rawsock_create() calls a privileged function sk_alloc() which requires a ns-aware check to check net->user_ns i.e. ns_capable(). However the original code checks the init_user_ns using capable(). So we replace the capable() with ns_capable().

Reference

https://git.kernel.org/stable/c/c08e0be44759d0b5affc5888be4aa5e536873335 https://git.kernel.org/stable/c/d6a21a3fb03300fbaa9fc3ed99f8b0962ce28362 https://git.kernel.org/stable/c/38cb2e23188af29c43966acee9dbb18b62e26cfe https://git.kernel.org/stable/c/ec72482564ff99c6832d33610d9f8ab7ecc81b6d https://git.kernel.org/stable/c/f3ed12af6bbbaf79eddb0ae14656b8ecacea74f0 https://git.kernel.org/stable/c/1e5cab50208c8fb7351b798cb1d569debfeb994a https://git.kernel.org/stable/c/90d0a3c76965d7a10fc87c07be3e9714e2130d5c https://git.kernel.org/stable/c/8ab78863e9eff11910e1ac8bcf478060c29b379e