CVE-2021-4145

A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0. The `self` pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host when writing data reaches the threshold of mirroring node.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
redhatCNA
---
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CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 9%
VendorProductVersion
qemuqemu
6.1.0
qemuqemu
6.1.0:rc0
qemuqemu
6.1.0:rc1
qemuqemu
6.1.0:rc2
qemuqemu
6.1.0:rc3
qemuqemu
6.1.0:rc4
redhatenterprise_linux
8.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
qemu
bullseye
1:5.2+dfsg-11+deb11u3
not-affected
buster
not-affected
stretch
not-affected
bullseye (security)
1:5.2+dfsg-11+deb11u2
fixed
bookworm
1:7.2+dfsg-7+deb12u7
fixed
sid
1:9.1.1+ds-2
fixed
trixie
1:9.1.1+ds-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
qemu
jammy
not-affected
impish
not-affected
hirsute
not-affected
focal
not-affected
bionic
not-affected
xenial
not-affected
trusty
not-affected
Common Weakness Enumeration
References
https://bugzilla.redhat.com/show_bug.cgi?id=2034602
https://gitlab.com/qemu-project/qemu/-/commit/66fed30c9cd11854fc878a4eceb507e915d7c9cd
https://security.gentoo.org/glsa/202208-27
https://security.netapp.com/advisory/ntap-20220311-0004/
https://bugzilla.redhat.com/show_bug.cgi?id=2034602
https://gitlab.com/qemu-project/qemu/-/commit/66fed30c9cd11854fc878a4eceb507e915d7c9cd
https://security.gentoo.org/glsa/202208-27
https://security.netapp.com/advisory/ntap-20220311-0004/