CVE-2024-4418

MEDIUM 6.2

Libvirt: stack use-after-free in virnetclientioeventloop()

CVSS Score

6.2

EPSS Score

0.0%

EPSS Percentile

0th

A race condition leading to a stack use-after-free flaw was found in libvirt. Due to a bad assumption in the virNetClientIOEventLoop() method, the `data` pointer to a stack-allocated virNetClientIOEventData structure ended up being used in the virNetClientIOEventFD callback while the data pointer's stack frame was concurrently being "freed" when returning from virNetClientIOEventLoop(). The 'virtproxyd' daemon can be used to trigger requests. If libvirt is configured with fine-grained access control, this issue, in theory, allows a user to escape their otherwise limited access. This flaw allows a local, unprivileged user to access virtproxyd without authenticating. Remote users would need to authenticate before they could access it.

CWE	CWE-562
Published	May 8, 2024
Last Updated	Feb 25, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 9

All versions affected

Red Hat / Red Hat Enterprise Linux 9.2 Extended Update Support

All versions affected

Red Hat / Red Hat Enterprise Linux 6

All versions affected

Red Hat / Red Hat Enterprise Linux 7

All versions affected

Red Hat / Red Hat Enterprise Linux 8 Advanced Virtualization

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

access.redhat.com: https://access.redhat.com/errata/RHSA-2024:4351 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:4432 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:4757 access.redhat.com: https://access.redhat.com/security/cve/CVE-2024-4418 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2278616 lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/[email protected]/message/4IE44UIIC3QWBFRB4EUSFNLJBU6JLNSD/ lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/[email protected]/message/Q4ZQBAJVHIZMCZNTRPUW3ZKXRKLXRQZU/ security.netapp.com: https://security.netapp.com/advisory/ntap-20250411-0002/

Credits

Red Hat would like to thank Martin Širokov for reporting this issue.