CVE-2024-56637: netfilter: ipset: Hold module reference while requesting a module
First published: Fri Dec 27 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | <=5.10.223-1 | 5.10.234-1 6.1.129-1 6.1.128-1 6.12.20-1 6.12.21-1 |
| debian/linux-6.1 | 6.1.129-1~deb11u1 | |
| Linux Kernel |
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Reference Links
- https://git.kernel.org/stable/c/0e67805e805c1f3edd6f43adbe08ea14b552694b
- https://git.kernel.org/stable/c/456f010bfaefde84d3390c755eedb1b0a5857c3c
- https://git.kernel.org/stable/c/5bae60a933ba5d16eed55c6b279be51bcbbc79b0
- https://git.kernel.org/stable/c/6099b5d3e37145484fac4b8b4070c3f1abfb3519
- https://git.kernel.org/stable/c/90bf312a6b6b3d6012137f6776a4052ee85e0340
- https://git.kernel.org/stable/c/ba5e070f36682d07ca7ad2a953e6c9d96be19dca
- https://git.kernel.org/stable/c/e5e2d3024753fdaca818b822e3827614bacbdccf
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-56637
- https://nvd.nist.gov/vuln/detail/CVE-2024-56637
- https://launchpad.net/bugs/cve/CVE-2024-56637
- https://security-tracker.debian.org/tracker/CVE-2024-56637
- https://ubuntu.com/security/CVE-2024-56637
- https://git.kernel.org/linus/456f010bfaefde84d3390c755eedb1b0a5857c3c
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.
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