CVE-2023-52502 Information

Description

In the Linux kernel the following vulnerability has been resolved:

net: nfc: fix races in nfc_llcp_sock_get() and nfc_llcp_sock_get_sn()

Sili Luo reported a race in nfc_llcp_sock_get() leading to UAF.

Getting a reference on the socket found in a lookup while holding a lock should happen before releasing the lock.

nfc_llcp_sock_get_sn() has a similar problem.

Finally nfc_llcp_recv_snl() needs to make sure the socket found by nfc_llcp_sock_from_sn() does not disappear.

Reference

https://git.kernel.org/stable/c/e863f5720a5680e50c4cecf12424d7cc31b3eb0a https://git.kernel.org/stable/c/7adcf014bda16cdbf804af5c164d94d5d025db2d https://git.kernel.org/stable/c/6ac22ecdaad2ecc662048f8c6b0ceb1ca0699ef9 https://git.kernel.org/stable/c/d888d3f70b0de32b4f51534175f039ddab15eef8 https://git.kernel.org/stable/c/e4f2611f07c87b3ddb57c4b9e8efcd1e330fc3dc https://git.kernel.org/stable/c/d1af8a39cf839d93c8967fdd858f6bbdc3e4a15c https://git.kernel.org/stable/c/31c07dffafce914c1d1543c135382a11ff058d93