NULL Pointer Dereference Affecting qemu-kvm package, versions <5.2.0-150300.109.2
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Test your applications- Snyk ID SNYK-SLES153-QEMUKVM-2645839
- published 14 Apr 2022
- disclosed 25 Jan 2022
Introduced: 25 Jan 2022
CVE-2021-20196 Open this link in a new tabHow to fix?
Upgrade SLES:15.3 qemu-kvm to version 5.2.0-150300.109.2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream qemu-kvm package and not the qemu-kvm package as distributed by SLES.
See How to fix? for SLES:15.3 relevant fixed versions and status.
A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
References
- https://www.suse.com/security/cve/CVE-2021-20196.html
- https://bugzilla.suse.com/1181361
- https://bugs.launchpad.net/qemu/+bug/1912780
- https://www.openwall.com/lists/oss-security/2021/01/28/1
- https://security.netapp.com/advisory/ntap-20210708-0004/
- https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
- https://access.redhat.com/errata/RHSA-2022:0325
- https://access.redhat.com/errata/RHSA-2022:0397
- https://access.redhat.com/errata/RHSA-2022:1759
- https://access.redhat.com/security/cve/CVE-2021-20196
- https://bugzilla.redhat.com/show_bug.cgi?id=1919210