Vulnerability CVE-2021-47285
Published: 2024-05-21

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().

 References:
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
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