Description
An out-of-bounds heap buffer access flaw was found in the way the iSCSI Block driver in QEMU versions 2.12.0 before 4.2.1 handled a response coming from an iSCSI server while checking the status of a Logical Address Block (LBA) in an iscsi_co_block_status() routine. A remote user could use this flaw to crash the QEMU process, resulting in a denial of service or potential execution of arbitrary code with privileges of the QEMU process on the host.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | QEMU | All qemu versions 2.12.0 before 4.2.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | qemu | 1:4.2-2 | — |
| Debian 13 | qemu | 1:4.2-2 | — |
| Debian 12 | qemu | 1:4.2-2 | — |
| Debian 9 | qemu | 1:2.8+dfsg-6+deb9u11 | DLA-2373-1 |
| Debian 8 | qemu | 1:2.1+dfsg-12+deb8u14 | DLA-2144-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | qemu | 1:4.2-3ubuntu1 | — |
| Ubuntu 18.04 LTS | qemu | 1:2.11+dfsg-1ubuntu7.23 | USN-4283-1 |
| Ubuntu 16.04 LTS | qemu | 1:2.5+dfsg-5ubuntu10.43 | USN-4283-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | qemu | 2.0.0+dfsg-2ubuntu1.47+esm6 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | SLOF | 20171214-6.gitfa98132.module+el8.1.0+4066+0f1aadab | RHSA-2020:1358, RHSA-2020:0731 |
| RHEL 8 | hivex +6 | 1.3.15-7.module+el8.1.0+4066+0f1aadab | RHSA-2020:1358, RHSA-2020:0731 |
| RHEL 8 | libguestfs-winsupport | 8.0-4.module+el8.1.0+4066+0f1aadab | RHSA-2020:1358, RHSA-2020:0731 |
| RHEL 8 | libiscsi +2 | 1.18.0-8.module+el8.1.0+4066+0f1aadab | RHSA-2020:1358, RHSA-2020:0731 |
| RHEL 8 | libnbd +4 | 1.0.3-1.module+el8.1.1+5659+15cacc69 | RHSA-2020:0731 |
| RHEL 8 | libtpms +1 | 0.7.0-1.20191018gitdc116933b7.module+el8.1.1+5309+6d656f05 | RHSA-2020:0731 |
| RHEL 8 | libvirt +27 | 4.5.0-35.3.module+el8.1.0+5931+8897e7e1 | RHSA-2020:1358, RHSA-2020:0731 |
| RHEL 8 | libvirt-daemon-driver-storage-iscsi-direct | 5.6.0-10.module+el8.1.1+5309+6d656f05 | RHSA-2020:0731 |
| RHEL 8 | libvirt-dbus | 1.2.0-3.module+el8.1.0+4066+0f1aadab | RHSA-2020:1358, RHSA-2020:0731 |
| RHEL 8 | libvirt-python +1 | 4.5.0-2.module+el8.1.0+4066+0f1aadab | RHSA-2020:1358, RHSA-2020:0731 |
| RHEL 8 | nbdkit +9 | 1.4.2-5.module+el8.1.0+4066+0f1aadab | RHSA-2020:1358, RHSA-2020:0731 |
| RHEL 8 | nbdkit-server +8 | 1.12.5-2.module+el8.1.1+5309+6d656f05 | RHSA-2020:0731 |
| RHEL 8 | netcf +2 | 0.2.8-12.module+el8.1.0+4066+0f1aadab | RHSA-2020:1358, RHSA-2020:0731 |
| RHEL 8 | perl-Sys-Virt | 4.5.0-5.module+el8.1.0+4066+0f1aadab | RHSA-2020:1358, RHSA-2020:0731 |
| RHEL 8 | python-pyvmomi +1 | 6.7.1-7.module+el8.1.1+5668+2d43f0bb | RHSA-2020:0731 |
| RHEL 8 | qemu-img +10 | 15:2.12.0-88.module+el8.1.0+5708+85d8e057.3 | RHSA-2020:1358, RHSA-2020:0731 |
| RHEL 8 | seabios +2 | 1.11.1-4.module+el8.1.0+4066+0f1aadab | RHSA-2020:1358, RHSA-2020:0731 |
| RHEL 8 | sgabios +1 | 1:0.20170427git-3.module+el8.1.0+4066+0f1aadab | RHSA-2020:1358, RHSA-2020:0731 |
| RHEL 8 | supermin +1 | 5.1.19-9.module+el8.1.0+4066+0f1aadab | RHSA-2020:1358, RHSA-2020:0731 |
| RHEL 8 | swtpm +3 | 0.2.0-1.20191018git9227cf4.module+el8.1.1+5309+6d656f05 | RHSA-2020:0731 |
| RHEL 8 | virglrenderer +2 | 0.6.0-5.20180814git491d3b705.module+el8.1.1+5309+6d656f05 | RHSA-2020:0731 |
| RHEL 8 | virt-dib +26 | 1:1.38.4-14.module+el8.1.0+4066+0f1aadab | RHSA-2020:1358, RHSA-2020:0731 |
| RHEL 7 | qemu-img-ma +7 | 10:2.12.0-44.el7 | RHSA-2020:1216, RHSA-2020:1150 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Manager 4 | qemu-img-rhev +3 | 10:2.12.0-18.el7_6.9 | RHSA-2020:1216, RHSA-2020:0730 |
| RHEL 8.0 E4S | SLOF | 20171214-6.gitfa98132.module+el8.0.0+4084+cceb9f44 | RHSA-2020:2472 |
| RHEL 8.0 E4S | hivex +4 | 1.3.15-7.module+el8.0.0+4084+cceb9f44 | RHSA-2020:2472 |
| RHEL 8.0 E4S | libguestfs-winsupport | 8.0-3.module+el8.0.0+4084+cceb9f44 | RHSA-2020:2472 |
| RHEL 8.0 E4S | libiscsi +2 | 1.18.0-7.module+el8.0.0+4084+cceb9f44 | RHSA-2020:2472 |
| RHEL 8.0 E4S | libssh2 | 1.8.0-8.module+el8.0.0+4084+cceb9f44.1 | RHSA-2020:2472 |
| RHEL 8.0 E4S | libvirt +27 | 4.5.0-24.3.module+el8.0.0+4084+cceb9f44 | RHSA-2020:2472 |
| RHEL 8.0 E4S | libvirt-dbus | 1.2.0-3.module+el8.0.0+4084+cceb9f44 | RHSA-2020:2472 |
| RHEL 8.0 E4S | libvirt-python +1 | 4.5.0-2.module+el8.0.0+4084+cceb9f44 | RHSA-2020:2472 |
| RHEL 8.0 E4S | nbdkit +9 | 1.4.2-5.module+el8.0.0+4084+cceb9f44 | RHSA-2020:2472 |
| RHEL 8.0 E4S | netcf +2 | 0.2.8-11.module+el8.0.0+4084+cceb9f44 | RHSA-2020:2472 |
| RHEL 8.0 E4S | perl-Sys-Virt | 4.5.0-5.module+el8.0.0+4084+cceb9f44 | RHSA-2020:2472 |
| RHEL 8.0 E4S | qemu-img +9 | 15:2.12.0-65.module+el8.0.0+6140+ec5d8118.7 | RHSA-2020:2472 |
| RHEL 8.0 E4S | seabios +2 | 1.11.1-4.module+el8.0.0+4084+cceb9f44 | RHSA-2020:2472 |
| RHEL 8.0 E4S | sgabios +1 | 1:0.20170427git-3.module+el8.0.0+4084+cceb9f44 | RHSA-2020:2472 |
| RHEL 8.0 E4S | supermin +1 | 5.1.19-9.module+el8.0.0+4084+cceb9f44 | RHSA-2020:2472 |
| RHEL 8.0 E4S | virt-dib +24 | 1:1.38.4-11.1.module+el8.0.0+4084+cceb9f44 | RHSA-2020:2472 |
| RHEL 7.7 EUS | qemu-img-ma +3 | 10:2.12.0-33.el7_7.3 | RHSA-2020:1352 |
| RHEL 7.6 EUS | qemu-img-ma +3 | 10:2.12.0-18.el7_6.5 | RHSA-2020:0669 |
| RHEL 7.5 EUS | qemu-img-ma +3 | 10:2.10.0-21.el7_5.5 | RHSA-2020:1505 |
| Red Hat OpenStack 13 | qemu-img-rhev +3 | 10:2.12.0-18.el7_6.9 | RHSA-2020:1296, RHSA-2020:0773 |
| Red Hat OpenStack 10 | qemu-img-rhev +3 | 10:2.12.0-33.el7_7.10 | RHSA-2020:1300 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | libiscsi +2 | 1.18.0-8.module_el8.3.0+2048+e7a0a3ea | ALSA-2020:1358 |
| AlmaLinux 8 | netcf +2 | 0.2.8-12.module_el8.3.0+2048+e7a0a3ea | ALSA-2020:1358 |
| AlmaLinux 8 | sgabios | 1:0.20170427git-3.module_el8.3.0+2048+e7a0a3ea | ALSA-2020:1358 |
| AlmaLinux 8 | sgabios-bin | 1:0.20170427git-3.module_el8.5.0+2608+72063365 | ALSA-2020:1358 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | libiscsi | 1.18.0-8.module+el8.4.0+534+4680a14e | RLSA-2020:1358 |
| Rocky Linux 8 | netcf | 0.2.8-12.module+el8.4.0+534+4680a14e | RLSA-2020:1358 |
| Rocky Linux 8 | sgabios | 1:0.20170427git-3.module+el8.4.0+534+4680a14e | RLSA-2020:1358 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | qemu | 3.1.1.1-9.14.1 | SUSE-SU-2020:0844-1 |
| SLES 15 | qemu | 2.11.2-9.36.1 | SUSE-SU-2020:1523-1 |
| SLES 12 SP5 | qemu | 3.1.1.1-3.9.1 | SUSE-SU-2020:0845-1 |
| SLES 12 SP4 | qemu | 2.11.2-5.26.1 | SUSE-SU-2020:1501-1 |
| SLES 12 SP3 | qemu | 2.9.1-6.44.1 | SUSE-SU-2020:1538-1 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | qemu | 2.6.2-41.59.1 | SUSE-SU-2020:1526-1 |
| SLES 12 SP1 | qemu | 2.3.1-33.29.1 | SUSE-SU-2020:1514-1 |
| SLES for SAP 15 | qemu | 2.11.2-9.36.1 | SUSE-SU-2020:1523-1 |
| SLES for SAP 12 SP5 | qemu | 3.1.1.1-3.9.1 | SUSE-SU-2020:0845-1 |
| SLES for SAP 12 SP4 | qemu | 2.11.2-5.26.1 | SUSE-SU-2020:1501-1 |
| SLES for SAP 12 SP3 | qemu | 2.9.1-6.44.1 | SUSE-SU-2020:1538-1 |
| SLES for SAP 12 SP2 | qemu | 2.6.2-41.59.1 | SUSE-SU-2020:1526-1 |
| SLES for SAP 12 SP1 | qemu | 2.3.1-33.29.1 | SUSE-SU-2020:1514-1 |
| SLE HPC 15 | qemu | 2.11.2-9.36.1 | SUSE-SU-2020:1523-1 |
| SUSE OpenStack Cloud Crowbar 8 | qemu | 2.9.1-6.44.1 | SUSE-SU-2020:1538-1 |
| SUSE OpenStack Cloud 8 | qemu | 2.9.1-6.44.1 | SUSE-SU-2020:1538-1 |
| SUSE OpenStack Cloud 7 | qemu | 2.6.2-41.59.1 | SUSE-SU-2020:1526-1 |
| SUSE HPE Helion OpenStack 8 | qemu | 2.9.1-6.44.1 | SUSE-SU-2020:1538-1 |
| SUSE Enterprise Storage 5 | qemu | 2.9.1-6.44.1 | SUSE-SU-2020:1538-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qemu | 6.1.0-32.1 | openSUSE-SU-2024:11287-1 |
| openSUSE Leap 15.1 | qemu +1 | 3.1.1.1-lp151.7.12.1 | openSUSE-SU-2020:0468-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | qemu +26 | 10:3.1.0-8.amzn2.0.2 | ALAS2-2020-1407 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | hivex +6 | 1.3.15-7.module+el8.1.0+5378+c5e0f4d7 | ELSA-2020-1358 |
| Oracle Linux 8 | libguestfs-winsupport | 8.0-4.module+el8.1.0+5378+c5e0f4d7 | ELSA-2020-1358 |
| Oracle Linux 8 | libiscsi +2 | 1.18.0-8.module+el8.1.0+5378+c5e0f4d7 | ELSA-2020-1358 |
| Oracle Linux 8 | libvirt +27 | 4.5.0-35.3.0.1.module+el8.1.0+5574+a95766b2 | ELSA-2020-1358 |
| Oracle Linux 8 | libvirt-dbus | 1.2.0-3.module+el8.1.0+5378+c5e0f4d7 | ELSA-2020-1358 |
| Oracle Linux 8 | nbdkit +9 | 1.4.2-5.module+el8.1.0+5378+c5e0f4d7 | ELSA-2020-1358 |
| Oracle Linux 8 | netcf +2 | 0.2.8-12.module+el8.1.0+5378+c5e0f4d7 | ELSA-2020-1358 |
| Oracle Linux 8 | perl-Sys-Virt | 4.5.0-5.module+el8.1.0+5378+c5e0f4d7 | ELSA-2020-1358 |
| Oracle Linux 8 | python3-libvirt | 4.5.0-2.module+el8.1.0+5378+c5e0f4d7 | ELSA-2020-1358 |
| Oracle Linux 8 | qemu-img +10 | 15:2.12.0-88.0.1.module+el8.1.0+5574+a95766b2.3 | ELSA-2020-1358 |
| Oracle Linux 8 | seabios +2 | 1.11.1-4.module+el8.1.0+5378+c5e0f4d7 | ELSA-2020-1358 |
| Oracle Linux 8 | sgabios +1 | 1:0.20170427git-3.module+el8.1.0+5378+c5e0f4d7 | ELSA-2020-1358 |
| Oracle Linux 8 | supermin +1 | 5.1.19-9.module+el8.1.0+5378+c5e0f4d7 | ELSA-2020-1358 |
| Oracle Linux 8 | virt-dib +26 | 1:1.38.4-14.0.1.module+el8.1.0+5378+c5e0f4d7 | ELSA-2020-1358 |
| Oracle Linux 7 | qemu +9 | 15:3.1.0-7.el7 | ELSA-2020-5576 |
Advisories 30
- ALSA-2020:1358 Important: virt:rhel security and bug fix update AlmaLinux Security Advisories · Nov 5, 2026
- WID-SEC-2024-1983 QEMU: Schwachstelle ermöglicht Ausführen von beliebigem Programmcode mit den Rechten des Dienstes BSI CERT-Bund (WID) · Jun 29, 2026
- RHSA-2020:2472 Red Hat Security Advisory: virt:rhel security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:1505 Red Hat Security Advisory: qemu-kvm-ma security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:0773 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:0731 Red Hat Security Advisory: virt:8.1 and virt-devel:8.1 security and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:0730 Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:0669 Red Hat Security Advisory: qemu-kvm-ma security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:1358 Red Hat Security Advisory: virt:rhel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:1352 Red Hat Security Advisory: qemu-kvm-ma security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:1296 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:1300 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:1216 Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:1150 Red Hat Security Advisory: qemu-kvm-ma security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-4283-1 qemu vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-2144-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2373-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2020:1358 Important: virt:rhel security and bug fix update Rocky Linux Security Advisories · Feb 5, 2026
- SUSE-SU-2020:0845-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1538-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0844-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0468-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1523-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1514-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1526-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11287-1 qemu-6.1.0-32.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2020:1501-1 Security update for qemu SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2020-1358 Important: virt:ol security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 15, 2020
- ALAS2-2020-1407 Important: qemu security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 25, 2020
- ELSA-2020-5576 Important: qemu security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 17, 2020
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1711
- https://lists.gnu.org/archive/html/qemu-devel/2020-01/msg05535.html
- https://www.openwall.com/lists/oss-security/2020/01/23/3
- USN-4283-1 vendor-advisory
- RHSA-2020:0669 vendor-advisory
- RHSA-2020:0773 vendor-advisory
- RHSA-2020:0730 vendor-advisory
- RHSA-2020:0731 vendor-advisory
- [debian-lts-announce] 20200316 [SECURITY] [DLA 2144-1] qemu security update mailing-list
- openSUSE-SU-2020:0468 vendor-advisory
- GLSA-202005-02 vendor-advisory
- [debian-lts-announce] 20200913 [SECURITY] [DLA 2373-1] qemu security update mailing-list