CVE-2024-56704 9p/xen: fix release of IRQ
A double-free vulnerability in the Linux kernel's 9p/xen driver allows local attackers to cause a denial of service via improper IRQ release.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-56704?
CVE-2024-56704 is a high-severity use after free vulnerability in Linux kernel, published on 28 Dec 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
9p/xen: fix release of IRQ
Kernel logs indicate an IRQ was double-freed.
Pass correct device ID during IRQ release.
[Dominique: remove confusing variable reset to 0]
Weakness: CWE-415
Which versions are affected by CVE-2024-56704?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-56704?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2024-56704 being exploited?
There is no known exploitation of CVE-2024-56704 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-55457, AZL-55466, BELL-CVE-2024-56704, DEBIAN-CVE-2024-56704, GHSA-679v-8hv6-2jm9, UBUNTU-CVE-2024-56704.