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CVE-2023-52502

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

CVSS 6.3 MEDIUMEPSS 0.2%
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.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
Produtos afetados
Linux · Linux

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Referências
https://git.kernel.org/stable/c/31c07dffafce914c1d1543c135382a11ff058d93https://git.kernel.org/stable/c/6ac22ecdaad2ecc662048f8c6b0ceb1ca0699ef9https://git.kernel.org/stable/c/7adcf014bda16cdbf804af5c164d94d5d025db2dhttps://git.kernel.org/stable/c/d1af8a39cf839d93c8967fdd858f6bbdc3e4a15chttps://git.kernel.org/stable/c/d888d3f70b0de32b4f51534175f039ddab15eef8https://git.kernel.org/stable/c/e4f2611f07c87b3ddb57c4b9e8efcd1e330fc3dchttps://git.kernel.org/stable/c/e863f5720a5680e50c4cecf12424d7cc31b3eb0a