CVE-2024-2494

Libvirt: negative g_new0 length can lead to unbounded memory allocation

publishedCWE-789

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.

Technical severity6.2 mediumCVSS 3.1 · CNA: redhat

Published2024-03-21Source updated 2026-11-05

Collected2026-11-052 attributed sources

Fixes and workarounds

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

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
`libvirt` https://gitlab.com/libvirt/libvirt/	≥ 9.0.0; < 9.7.0 (affected, semver) Other versions: unaffected	CNA: redhat
Red Hat Enterprise Linux 8 Red Hat `virt-devel:rhel` https://access.redhat.com/downloads/content/package-browser/	≥ 8100020240409073027.489197e6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8 Red Hat `virt:rhel` https://access.redhat.com/downloads/content/package-browser/	≥ 8100020240409073027.489197e6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9 Red Hat `libvirt` https://access.redhat.com/downloads/content/package-browser/	≥ 0:10.0.0-6.2.el9_4; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 6 Red Hat `libvirt` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat Enterprise Linux 7 Red Hat `libvirt` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat Enterprise Linux 8 Advanced Virtualization Red Hat `virt:av/libvirt` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 6.2 medium	`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`	CNA: redhat

Exploit evidence

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

References

https://access.redhat.com/errata/RHSA-2024:2560CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:3253CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2024-2494CNA: redhat · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2270115CNA: redhat · issue-tracking, x_refsource_REDHAT
https://lists.libvirt.org/archives/list/[email protected]/thread/BKRQXPLPC6B7FLHJXSBQYW7HNDEBW6RJ/CNA: redhat
https://access.redhat.com/errata/RHSA-2024:2560ADP: CVE · vendor-advisory, x_refsource_REDHAT, x_transferred
https://access.redhat.com/errata/RHSA-2024:3253ADP: CVE · vendor-advisory, x_refsource_REDHAT, x_transferred
https://access.redhat.com/security/cve/CVE-2024-2494ADP: CVE · vdb-entry, x_refsource_REDHAT, x_transferred
https://bugzilla.redhat.com/show_bug.cgi?id=2270115ADP: CVE · issue-tracking, x_refsource_REDHAT, x_transferred
https://lists.debian.org/debian-lts-announce/2024/04/msg00000.htmlADP: CVE · x_transferred
https://lists.libvirt.org/archives/list/[email protected]/thread/BKRQXPLPC6B7FLHJXSBQYW7HNDEBW6RJ/ADP: CVE · x_transferred
https://security.netapp.com/advisory/ntap-20240517-0009/ADP: CVE · x_transferred

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