CVE - CVE-2021-3748

CVE-ID
CVE-2021-3748	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://security.netapp.com/advisory/ntap-20220425-0004/ GENTOO:GLSA-202208-27 URL:https://security.gentoo.org/glsa/202208-27 MISC:https://bugzilla.redhat.com/show_bug.cgi?id=1998514 URL:https://bugzilla.redhat.com/show_bug.cgi?id=1998514 MISC:https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 URL:https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 MISC:https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html URL:https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html MISC:https://ubuntu.com/security/CVE-2021-3748 URL:https://ubuntu.com/security/CVE-2021-3748 MLIST:[debian-lts-announce] 20220404 [SECURITY] [DLA 2970-1] qemu security update URL:https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html MLIST:[debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security update URL:https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
Assigning CNA
Red Hat, Inc.
Date Record Created
20210830	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20210830)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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