net: nfc: fix races in nfc_llcp_sock_get() and nfc_llcp_sock_get_sn()
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.2%
exploitation probability
0.2%top 86% of all CVEs
observed exploitation
nono source reports it
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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
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