6.2 Medium

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

Description

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.

CVSS 3.1 detail

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitable with local access to the machine, without an account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Local
Attack complexity: Low
Privileges required: None
Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Affected products and versions

Product	Affected versions	Fixed in
Red Hat Enterprise Linux 8 8100020240409073027.489197	earliest → < 8100020240409073027.489197e6	8100020240409073027.489197e6
Red Hat Enterprise Linux 9	Versions not published
Red Hat Enterprise Linux 6	Versions not published
Red Hat Enterprise Linux 7	Versions not published
Red Hat Enterprise Linux 8 Advanced Virtualization	Versions not published

References

RHSA-2024:2560 access.redhat.com
RHSA-2024:3253 access.redhat.com
access.redhat.com access.redhat.com
RHBZ#2270115 bugzilla.redhat.com
lists.libvirt.org lists.libvirt.org

Timeline

Published March 21, 2024
Last modified November 5, 2026

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