CVE-2024-4418: Red Hat Enterprise Linux 6

Medium severity, CVSS 6.2. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Red Hat Red Hat Enterprise Linux 6
• Red Hat Red Hat Enterprise Linux 7
• Red Hat Red Hat Enterprise Linux 8: before 8100020240606142719.489197e6 (fixed in 8100020240606142719.489197e6)
• Red Hat Red Hat Enterprise Linux 8 Advanced Virtualization
• Red Hat Red Hat Enterprise Linux 9: before 0:10.0.0-6.6.el9_4 (fixed in 0:10.0.0-6.6.el9_4)
• Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support: before 0:9.0.0-10.7.el9_2 (fixed in 0:9.0.0-10.7.el9_2)

Published 2024-05-08. Last modified 2026-06-17.