NULL Pointer Dereference Affecting qemu package, versions <1:6.2+dfsg-1
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Test your applications- Snyk ID SNYK-DEBIANUNSTABLE-QEMU-2324963
- published 23 Dec 2021
- disclosed 25 Jan 2022
Introduced: 23 Dec 2021
CVE-2021-4145 Open this link in a new tabHow to fix?
Upgrade Debian:unstable
qemu
to version 1:6.2+dfsg-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream qemu
package and not the qemu
package as distributed by Debian
.
See How to fix?
for Debian:unstable
relevant fixed versions and status.
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.