# CVE-2024-2494: Libvirt: negative g_new0 length can lead to unbounded memory allocation

Status: published. Published: 2024-03-21. Updated: 2026-11-05.

A flaw was found in the RPC library APIs of libvirt. The RPC server deserialization code allocates memory for arrays before the non-negative length check is performed by the C API entry points. Passing a negative length to the g_new0 function results in a crash due to the negative length being treated as a huge positive number. This flaw allows a local, unprivileged user to perform a denial of service attack by causing the libvirt daemon to crash.

## Remediation

- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. (source: CNA: redhat)

## Affected products and versions

-  /  (libvirt): ≥ 9.0.0; < 9.7.0 (affected, semver). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (virt-devel:rhel): ≥ 8100020240409073027.489197e6; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (virt:rhel): ≥ 8100020240409073027.489197e6; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (libvirt): ≥ 0:10.0.0-6.2.el9_4; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (libvirt): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (libvirt): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 Advanced Virtualization (virt:av/libvirt): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 6.2 (medium); CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.37% as of 2026-11-04; percentile 30.70%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-789

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/errata/RHSA-2024:2560 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:3253 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2024-2494 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2270115 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/BKRQXPLPC6B7FLHJXSBQYW7HNDEBW6RJ/ (CNA: redhat)

- https://access.redhat.com/errata/RHSA-2024:2560 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/errata/RHSA-2024:3253 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/security/cve/CVE-2024-2494 (ADP: CVE; vdb-entry, x_refsource_REDHAT, x_transferred)

- https://bugzilla.redhat.com/show_bug.cgi?id=2270115 (ADP: CVE; issue-tracking, x_refsource_REDHAT, x_transferred)

- https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html (ADP: CVE; x_transferred)

- https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/BKRQXPLPC6B7FLHJXSBQYW7HNDEBW6RJ/ (ADP: CVE; x_transferred)

- https://security.netapp.com/advisory/ntap-20240517-0009/ (ADP: CVE; x_transferred)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2024-2494; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2024-2494; retrieved 2026-11-05; source updated Not reported

Revision: 91e2354665d2ce6afd0b4c607027c22e78de0f6db00b9eab7a1d674e39a4d890

Canonical: https://y2.dev/cve/CVE-2024-2494

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