Bug 2334550 (CVE-2024-56637)

Summary: CVE-2024-56637 kernel: netfilter: ipset: Hold module reference while requesting a module
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2024-12-27 16:02:55 UTC 
In the Linux kernel, the following vulnerability has been resolved:

netfilter: ipset: Hold module reference while requesting a module

User space may unload ip_set.ko while it is itself requesting a set type
backend module, leading to a kernel crash. The race condition may be
provoked by inserting an mdelay() right after the nfnl_unlock() call.
Comment 1 Avinash Hanwate 2024-12-28 02:38:11 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024122735-CVE-2024-56637-23bb@gregkh/T