CVE-2024-4418

Name	CVE-2024-4418
Description	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1070330

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libvirt (PTS)	buster	5.0.0-4+deb10u1	fixed
	buster (security)	5.0.0-4+deb10u2	fixed
	bullseye	7.0.0-3+deb11u2	fixed
	bookworm	9.0.0-4	fixed
	sid, trixie	10.3.0-3	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Debian Bugs
libvirt	source	buster	(not affected)
libvirt	source	bullseye	(not affected)
libvirt	source	bookworm	(not affected)
libvirt	source	(unstable)	10.3.0-1	1070330

Notes

[bookworm] - libvirt <not-affected> (Vulnerable code not present)
[bullseye] - libvirt <not-affected> (Vulnerable code not present)
[buster] - libvirt <not-affected> (Vulnerable code not present)
https://bugzilla.redhat.com/show_bug.cgi?id=2278616
Fixed by: https://gitlab.com/libvirt/libvirt/-/commit/8074d64dc2eca846d6a61efe1a9b7428a0ce1dd1
Introduced by: https://gitlab.com/libvirt/libvirt/-/commit/7cb03e6a28e465c49f0cabe8fe2e7d21edb5aadf (v10.0.0-rc2)