Vulnerability CVE-2024-27396
Published: 2024-05-14

Description:
In the Linux kernel, the following vulnerability has been resolved:

net: gtp: Fix Use-After-Free in gtp_dellink

Since call_rcu, which is called in the hlist_for_each_entry_rcu traversal
of gtp_dellink, is not part of the RCU read critical section, it
is possible that the RCU grace period will pass during the traversal and
the key will be free.

To prevent this, it should be changed to hlist_for_each_entry_safe.

 References:
https://git.kernel.org/stable/c/25a1c2d4b1fcf938356a9688a96a6456abd44b29
https://git.kernel.org/stable/c/2aacd4de45477582993f8a8abb9505a06426bfb6
https://git.kernel.org/stable/c/cd957d1716ec979d8f5bf38fc659aeb9fdaa2474
https://git.kernel.org/stable/c/f2a904107ee2b647bb7794a1a82b67740d7c8a64
https://git.kernel.org/stable/c/2e74b3fd6bf542349758f283676dff3660327c07
https://git.kernel.org/stable/c/0caff3e6390f840666b8dc1ecebf985c2ef3f1dd
https://git.kernel.org/stable/c/718df1bc226c383dd803397d7f5d95557eb81ac7
https://git.kernel.org/stable/c/07b20d0a3dc13fb1adff10b60021a4924498da58
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