Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 10.4%
CVSS Severity
CVSS v3 Score 6.5
CVSS v2 Score 4.9
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/
Products affected by CVE-2021-4145
-
cpe:2.3:a:qemu:qemu:6.1.0
-
cpe:2.3:o:redhat:enterprise_linux:8.0