# CVE-2024-2496: Libvirt: null pointer dereference in udevconnectlistallinterfaces() > A race condition in libvirt allows attackers to crash the daemon via null pointer dereference, causing denial of service. - **Severity:** Medium 5.0 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H`) - **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:** Yes - **Published:** 18 Mar 2024 - **Updated:** 8 Nov 2025 - **Also known as:** ALSA-2024:2236, AZL-36893, BELL-CVE-2024-2496, CLSA-2025-1745530850, CLSA-2025-1745585902, DEBIAN-CVE-2024-2496, GHSA-mfxp-38jc-24qj, MGASA-2024-0163, OESA-2024-2010, OESA-2024-2011, OESA-2024-2012, RHSA-2024:2236, UBUNTU-CVE-2024-2496 ## 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 (NULL Pointer Dereference) ## Which versions are affected by CVE-2024-2496? It affects 3 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `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: 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 - [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild) - [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild) - [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild) - [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild) - [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild) ## Fix prompt for AI coding agents ```text 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) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2024-2496 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-2496 - OSV: https://osv.dev/vulnerability/CVE-2024-2496 --- From sbomify Insights: https://insights.sbomify.com/CVE-2024-2496/ Summaries are generated and may contain mistakes; the official description above is the record.