CVE-2021-3748

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-3748
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.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 0.8 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

6.9 /10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:L/AC:M/Au:N/C:C/I:C/A:C

Exploitability : 3.4 / Impact : 10.0

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References
Link Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1998514 Issue Tracking Patch Third Party Advisory
https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List Third Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html Mailing List Patch Third Party Advisory
https://security.gentoo.org/glsa/202208-27 Third Party Advisory
https://security.netapp.com/advisory/ntap-20220425-0004/ Third Party Advisory
https://ubuntu.com/security/CVE-2021-3748 Patch Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1998514 Issue Tracking Patch Third Party Advisory
https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List Third Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html Mailing List Patch Third Party Advisory
https://security.gentoo.org/glsa/202208-27 Third Party Advisory
https://security.netapp.com/advisory/ntap-20220425-0004/ Third Party Advisory
https://ubuntu.com/security/CVE-2021-3748 Patch Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Configuration 3 (hide)

OR cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*

Configuration 4 (hide)

cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

Configuration 5 (hide)

OR cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
cpe:2.3:o:redhat:enterprise_linux_advanced_virtualization_eus:8.4:*:*:*:*:*:*:*
History

21 Nov 2024, 06:22

Type Values Removed Values Added
References () https://bugzilla.redhat.com/show_bug.cgi?id=1998514 - Issue Tracking, Patch, Third Party Advisory () https://bugzilla.redhat.com/show_bug.cgi?id=1998514 - Issue Tracking, Patch, Third Party Advisory
References () https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 - Patch, Third Party Advisory () https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 - Patch, Third Party Advisory
References () https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html - Mailing List, Third Party Advisory () https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html - Mailing List, Third Party Advisory
References () https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html - Mailing List, Third Party Advisory () https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html - Mailing List, Third Party Advisory
References () https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html - Mailing List, Patch, Third Party Advisory () https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html - Mailing List, Patch, Third Party Advisory
References () https://security.gentoo.org/glsa/202208-27 - Third Party Advisory () https://security.gentoo.org/glsa/202208-27 - Third Party Advisory
References () https://security.netapp.com/advisory/ntap-20220425-0004/ - Third Party Advisory () https://security.netapp.com/advisory/ntap-20220425-0004/ - Third Party Advisory
References () https://ubuntu.com/security/CVE-2021-3748 - Patch, Third Party Advisory () https://ubuntu.com/security/CVE-2021-3748 - Patch, Third Party Advisory

26 Oct 2022, 13:36

Type Values Removed Values Added
References (MLIST) https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html - (MLIST) https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html - Mailing List, Third Party Advisory
References (GENTOO) https://security.gentoo.org/glsa/202208-27 - (GENTOO) https://security.gentoo.org/glsa/202208-27 - Third Party Advisory
CPE cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

05 Sep 2022, 06:15

Type Values Removed Values Added
References
  • (MLIST) https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html -

15 Aug 2022, 11:15

Type Values Removed Values Added
References
  • (GENTOO) https://security.gentoo.org/glsa/202208-27 -

13 May 2022, 11:59

Type Values Removed Values Added
References (CONFIRM) https://security.netapp.com/advisory/ntap-20220425-0004/ - (CONFIRM) https://security.netapp.com/advisory/ntap-20220425-0004/ - Third Party Advisory
References (MLIST) https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html - (MLIST) https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html - Mailing List, Third Party Advisory
CPE cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_advanced_virtualization_eus:8.4:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*

25 Apr 2022, 21:15

Type Values Removed Values Added
References
  • (CONFIRM) https://security.netapp.com/advisory/ntap-20220425-0004/ -

04 Apr 2022, 16:15

Type Values Removed Values Added
References
  • (MLIST) https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html -

29 Mar 2022, 18:58

Type Values Removed Values Added
CWE CWE-416
CPE cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : 7.2
v3 : 8.8
References (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=1998514 - (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=1998514 - Issue Tracking, Patch, Third Party Advisory
References (MISC) https://ubuntu.com/security/CVE-2021-3748 - (MISC) https://ubuntu.com/security/CVE-2021-3748 - Patch, Third Party Advisory
References (MISC) https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html - (MISC) https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html - Mailing List, Patch, Third Party Advisory
References (MISC) https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 - (MISC) https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 - Patch, Third Party Advisory

23 Mar 2022, 20:15

Type Values Removed Values Added
New CVE
Information

Published : 2022-03-23 20:15

Updated : 2024-11-21 06:22

NVD link : CVE-2021-3748

Mitre link : CVE-2021-3748

CVE.ORG link : CVE-2021-3748

JSON object : View

Products Affected

qemu

  • qemu

fedoraproject

  • fedora

redhat

  • enterprise_linux
  • enterprise_linux_advanced_virtualization_eus

canonical

  • ubuntu_linux

debian

  • debian_linux
CWE
CWE-416

Use After Free