CVE-2024-2496 Libvirt: null pointer dereference in udevconnectlistallinterfaces()
Medium 5.0
Published
Updated
Check this codebase for CVE-2024-2496 and fix it if it is affected.
What it is: CVE-2024-2496 is a medium-severity vulnerability in Debian Debian Linux, published on 18 Mar 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2024-2496 in the wild and no public exploit code.
Affected product: Debian Debian Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2024-2496/ (Markdown: https://insights.sbomify.com/CVE-2024-2496/index.md)
A race condition in libvirt allows attackers to crash the daemon via null pointer dereference, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2024-2496?
CVE-2024-2496 is a medium-severity vulnerability in Debian Debian Linux, published on 18 Mar 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A NULL pointer dereference flaw was found in the udevConnectListAllInterfaces() function in libvirt. This issue can occur when detaching a host interface while at the same time collecting the list of interfaces via virConnectListAllInterfaces API. This flaw could be used to perform a denial of service attack by causing the libvirt daemon to crash.
Weakness: CWE-476
Which versions are affected by CVE-2024-2496?
It affects 3 products.
Linux distribution packages (40)
libvirt AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-client AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-client-qemu AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-common AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-config-network AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-config-nwfilter AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-driver-interface AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-driver-network AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-driver-nodedev AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-driver-nwfilter AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-driver-qemu AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-driver-secret AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-driver-storage AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-driver-storage-core AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-driver-storage-disk AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-driver-storage-iscsi AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-driver-storage-logical AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-driver-storage-mpath AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-driver-storage-rbd AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-driver-storage-scsi AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-kvm AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-lock AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-log AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-plugin-lockd AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-plugin-sanlock AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-daemon-proxy AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-devel AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-docs AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-libs AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt-nss AlmaLinux:9 | All versions | 10.0.0-6.el9_4.alma.1 |
libvirt Red Hat:enterprise_linux:9::appstream | All versions | 0:10.0.0-6.el9_4 |
libvirt-client Red Hat:enterprise_linux:9::appstream | All versions | 0:10.0.0-6.el9_4 |
libvirt-client-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:10.0.0-6.el9_4 |
libvirt-client-qemu Red Hat:enterprise_linux:9::appstream | All versions | 0:10.0.0-6.el9_4 |
libvirt-daemon Red Hat:enterprise_linux:9::appstream | All versions | 0:10.0.0-6.el9_4 |
libvirt-daemon-common Red Hat:enterprise_linux:9::appstream | All versions | 0:10.0.0-6.el9_4 |
libvirt-daemon-common-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:10.0.0-6.el9_4 |
libvirt-daemon-config-network Red Hat:enterprise_linux:9::appstream | All versions | 0:10.0.0-6.el9_4 |
libvirt-daemon-config-nwfilter Red Hat:enterprise_linux:9::appstream | All versions | 0:10.0.0-6.el9_4 |
Products include Debian Debian Linux, Redhat Enterprise Linux, Redhat Libvirt.
How do I fix CVE-2024-2496?
Apply the vendor's patch.
Is CVE-2024-2496 being exploited?
There is no known exploitation of CVE-2024-2496 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as ALSA-2024:2236, AZL-36893, BELL-CVE-2024-2496, CLSA-2025-1745530850, CLSA-2025-1745585902, DEBIAN-CVE-2024-2496 and 7 more.