Vulnerability CVE-2024-27395
Published: 2024-05-14

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

net: openvswitch: Fix Use-After-Free in ovs_ct_exit

Since kfree_rcu, which is called in the hlist_for_each_entry_rcu traversal
of ovs_ct_limit_exit, 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/5ea7b72d4fac2fdbc0425cd8f2ea33abe95235b2
https://git.kernel.org/stable/c/edee0758747d7c219e29db9ed1d4eb33e8d32865
https://git.kernel.org/stable/c/eaa5e164a2110d2fb9e16c8a29e4501882235137
https://git.kernel.org/stable/c/bca6fa2d9a9f560e6b89fd5190b05cc2f5d422c1
https://git.kernel.org/stable/c/9048616553c65e750d43846f225843ed745ec0d4
https://git.kernel.org/stable/c/35880c3fa6f8fe281a19975d2992644588ca33d3
https://git.kernel.org/stable/c/589523cf0b384164e445dd5db8d5b1bf97982424
https://git.kernel.org/stable/c/2db9a8c0a01fa1c762c1e61a13c212c492752994
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