Skip to content
VulniPulse
Sign in
Advisory severityMedium6.2Red Hat Linux

Medium [CVE-2024-4418] Libvirt: stack use-after-free in virnetclientioeventloop

This medium-severity Red Hat Linux advisory covers CVE-2024-4418 affecting Red Hat Enterprise Linux 9.2 Extended Update Support, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2024-4418 Source published Source updated

VulniPulse record published

CVE-2024-4418
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

Summary

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.

Red Hat severity: Moderate — CVSS 6.2 (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-562.

Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.2 Extended Update Support; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8 Advanced Virtualization.

Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8 Advanced Virtualization. Red Hat fixing advisory: RHSA-2024:4351, RHSA-2024:4757, RHSA-2024:4432.

Affected products named by the advisory: Red Hat package: libvirt.

Is CVE-2024-4418 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2024-4418 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2024-4418?

Upgrade to a fixed release named by Red Hat:

  • virt-devel:rhel-8100020240606142719.489197e6
  • virt:rhel-8100020240606142719.489197e6
  • libvirt-0:10.0.0-6.6.el9_4
  • libvirt-0:9.0.0-10.7.el9_2
  • RHSA-2024:4351
  • RHSA-2024:4757
  • RHSA-2024:4432

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 5 days ago·verify at source

Fixed versions
  • virt-devel:rhel-8100020240606142719.489197e6
  • virt:rhel-8100020240606142719.489197e6
  • libvirt-0:10.0.0-6.6.el9_4
  • libvirt-0:9.0.0-10.7.el9_2
  • RHSA-2024:4351
  • RHSA-2024:4757
  • RHSA-2024:4432

Official advisory · high-confidence parse· fetched 5 days ago·verify at source

Mitigation

Upgrade to a fixed release: virt-devel:rhel-8100020240606142719.489197e6, virt:rhel-8100020240606142719.489197e6, libvirt-0:10.0.0-6.6.el9_4, libvirt-0:9.0.0-10.7.el9_2, RHSA-2024:4351, RHSA-2024:4757. That is the remediation for this advisory.

The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.

Official advisory · high-confidence parse· fetched 5 days ago·verify at source

Get an email when Red Hat RHEL & SELinux publishes the next one.

See Red Hat RHEL & SELinux's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).

Alert me about Red Hat RHEL & SELinux

More Red Hat Linux advisories

All Red Hat Linux advisories

iPhone and Android apps · New on the App Store

Monitor future Red Hat Linux CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.

Download on the App StoreGet CVE alerts on AndroidSee app features

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.

Sign in to join the discussion.