CVE-2024-56637: netfilter: ipset: Hold module reference while requesting a module
In the Linux kernel, the following vulnerability has been resolved:
netfilter: ipset: Hold module reference while requesting a module
User space may unload ipset.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 nfnlunlock() call.
Other sources
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— Launchpad
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.27-1 - Upgrade
Upgrade
debian/linux-6.1to a version that resolves this vulnerability.Fixed in 6.1.129-1~deb11u1
Event History
Frequently Asked Questions
What is the severity of CVE-2024-56637?
CVE-2024-56637 has a high severity rating due to the potential risk of kernel crashes caused by a race condition.
How do I fix CVE-2024-56637?
To fix CVE-2024-56637, update the Linux kernel to the latest patched version provided by your distribution.
Which software versions are affected by CVE-2024-56637?
CVE-2024-56637 affects the Linux kernel, specifically in the netfilter ipset module.
What kind of attack does CVE-2024-56637 facilitate?
CVE-2024-56637 can potentially lead to denial of service conditions due to kernel crashes.
Is CVE-2024-56637 related to memory management vulnerabilities?
CVE-2024-56637 is related to module reference handling in the Linux kernel, leading to instability during module loading.