# CVE-2023-2700: Denial of service in libvirt > Repeated querying of SR-IOV PCI device capabilities in libvirt causes a memory leak, potentially leading to denial of service. - **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/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:** Not needed - **Fix available:** Yes - **Published:** 15 May 2023 - **Updated:** 28 Jan 2025 - **Also known as:** ALSA-2023:3715, ALSA-2023:3822, AZL-26736, AZL-34958, BELL-CVE-2023-2700, DEBIAN-CVE-2023-2700, GHSA-v972-h57q-v8pw, RHSA-2023:3715, RHSA-2023:3822, RHSA-2023:4799, RLSA-2023:3715, RLSA-2023:3822, SUSE-SU-2023:2356-1, SUSE-SU-2023:2652-1, UBUNTU-CVE-2023-2700 ## What is CVE-2023-2700? CVE-2023-2700 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 15 May 2023. It can only be exploited from the same machine or local network, with no action from the victim. ### Official description A vulnerability was found in libvirt. This security flaw ouccers due to repeatedly querying an SR-IOV PCI device's capabilities that exposes a memory leak caused by a failure to free the virPCIVirtualFunction array within the parent struct's g_autoptr cleanup. Weakness: CWE-401 (Missing Release of Memory after Effective Lifetime) ## Which versions are affected by CVE-2023-2700? It affects 3 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `SLOF` | AlmaLinux:8 | All versions | 20210217-1.module_el8.6.0+2880+7d9e3703 | | `hivex` | AlmaLinux:8 | All versions | 1.3.18-23.module_el8.6.0+2880+7d9e3703 | | `hivex` | AlmaLinux:8 | All versions | 1.3.18-23.module_el8.6.0+3161+a07c0ea5 | | `hivex-devel` | AlmaLinux:8 | All versions | 1.3.18-23.module_el8.6.0+2880+7d9e3703 | | `hivex-devel` | AlmaLinux:8 | All versions | 1.3.18-23.module_el8.6.0+3161+a07c0ea5 | | `libguestfs` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-appliance` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-bash-completion` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-devel` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-gfs2` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-gobject` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-gobject-devel` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-inspect-icons` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-java` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-java-devel` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-javadoc` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-man-pages-ja` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-man-pages-uk` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-rescue` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-rsync` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-tools` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-tools-c` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libguestfs-winsupport` | AlmaLinux:8 | All versions | 8.8-1.module_el8.8.0+3485+7cffc4a3 | | `libguestfs-xfs` | AlmaLinux:8 | All versions | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | | `libiscsi` | AlmaLinux:8 | All versions | 1.18.0-8.module_el8.6.0+2880+7d9e3703 | | `libiscsi` | AlmaLinux:8 | All versions | 1.18.0-8.module_el8.6.0+3161+a07c0ea5 | | `libiscsi-devel` | AlmaLinux:8 | All versions | 1.18.0-8.module_el8.6.0+2880+7d9e3703 | | `libiscsi-devel` | AlmaLinux:8 | All versions | 1.18.0-8.module_el8.6.0+3161+a07c0ea5 | | `libiscsi-utils` | AlmaLinux:8 | All versions | 1.18.0-8.module_el8.6.0+2880+7d9e3703 | | `libiscsi-utils` | AlmaLinux:8 | All versions | 1.18.0-8.module_el8.6.0+3161+a07c0ea5 | | `libnbd` | AlmaLinux:8 | All versions | 1.6.0-5.module_el8.6.0+2880+7d9e3703 | | `libnbd` | AlmaLinux:8 | All versions | 1.6.0-5.module_el8.6.0+3161+a07c0ea5 | | `libnbd-bash-completion` | AlmaLinux:8 | All versions | 1.6.0-5.module_el8.6.0+2880+7d9e3703 | | `libnbd-devel` | AlmaLinux:8 | All versions | 1.6.0-5.module_el8.6.0+2880+7d9e3703 | | `libnbd-devel` | AlmaLinux:8 | All versions | 1.6.0-5.module_el8.6.0+3161+a07c0ea5 | | `libtpms` | AlmaLinux:8 | All versions | 0.9.1-2.20211126git1ff6fe1f43.module_el8.8.0+3553+bd08596b | | `libtpms-devel` | AlmaLinux:8 | All versions | 0.9.1-2.20211126git1ff6fe1f43.module_el8.8.0+3553+bd08596b | | `libvirt` | AlmaLinux:8 | All versions | 8.0.0-19.2.module_el8.8.0+3585+76b9c397.alma | | `libvirt-client` | AlmaLinux:8 | All versions | 8.0.0-19.2.module_el8.8.0+3585+76b9c397.alma | | `libvirt-daemon` | AlmaLinux:8 | All versions | 8.0.0-19.2.module_el8.8.0+3585+76b9c397.alma | Products: Fedoraproject Fedora, Redhat Enterprise Linux, Redhat Libvirt. ## How do I fix CVE-2023-2700? Apply the vendor's patch. ## Is CVE-2023-2700 being exploited? There is no known exploitation of CVE-2023-2700 in the wild and no public exploit code. ## Other vulnerabilities in Fedoraproject Fedora - [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild) - [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild) - [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild) - [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild) - [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2023-2700 and fix it if it is affected. What it is: CVE-2023-2700 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 15 May 2023. It can only be exploited from the same machine or local network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2023-2700 in the wild and no public exploit code. Affected product: Fedoraproject Fedora. 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-2023-2700/ (Markdown: https://insights.sbomify.com/CVE-2023-2700/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2023-2700 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-2700 - OSV: https://osv.dev/vulnerability/CVE-2023-2700 --- From sbomify Insights: https://insights.sbomify.com/CVE-2023-2700/ Summaries are generated and may contain mistakes; the official description above is the record.