Description
hw/net/xgmac.c in the XGMAC Ethernet controller in QEMU before 07-20-2020 has a buffer overflow. This occurs during packet transmission and affects the highbank and midway emulated machines. A guest user or process could use this flaw to crash the QEMU process on the host, resulting in a denial of service or potential privileged code execution. This was fixed in commit 5519724a13664b43e225ca05351c60b4468e4555.
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 | 1:5.0-12 | — |
| Debian 13 | qemu | 1:5.0-12 | — |
| Debian 12 | qemu | 1:5.0-12 | — |
| Debian 10 | qemu | 1:3.1+dfsg-8+deb10u8 | DSA-4760-1 |
| Debian 9 | qemu | 1:2.8+dfsg-6+deb9u10 | DLA-2288-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | qemu | 1:4.2-3ubuntu6.4 | USN-4467-1 |
| Ubuntu 18.04 LTS | qemu | 1:2.11+dfsg-1ubuntu7.31 | USN-4467-1 |
| Ubuntu 16.04 LTS | qemu | 1:2.5+dfsg-5ubuntu10.45 | USN-4467-1 |
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 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | qemu | 4.2.1-11.10.1 | SUSE-SU-2020:2877-1 |
| SLES 15 SP1 | qemu | 3.1.1.1-9.24.3 | SUSE-SU-2021:1245-1 |
| SLES 15 | qemu | 2.11.2-9.43.1 | SUSE-SU-2021:1244-1 |
| SLES 12 SP5 | qemu | 3.1.1.1-45.1 | SUSE-SU-2020:2743-1 |
| SLES 12 SP4 | qemu | 2.11.2-5.29.1 | SUSE-SU-2021:1241-1 |
Show 20 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | qemu | 2.9.1-6.47.1 | SUSE-SU-2021:1240-1 |
| SLES 12 SP2 | qemu | 2.6.2-41.62.1 | SUSE-SU-2021:1305-1 |
| SLES 11 SP4 | kvm | 1.4.2-60.37.1 | SUSE-SU-2021:14772-1 |
| SLES for SAP 15 SP1 | qemu | 3.1.1.1-9.24.3 | SUSE-SU-2021:1245-1 |
| SLES for SAP 15 | qemu | 2.11.2-9.43.1 | SUSE-SU-2021:1244-1 |
| SLES for SAP 12 SP5 | qemu | 3.1.1.1-45.1 | SUSE-SU-2020:2743-1 |
| SLES for SAP 12 SP4 | qemu | 2.11.2-5.29.1 | SUSE-SU-2021:1241-1 |
| SLES for SAP 12 SP3 | qemu | 2.9.1-6.47.1 | SUSE-SU-2021:1240-1 |
| SLE HPC 15 SP1 | qemu | 3.1.1.1-9.24.3 | SUSE-SU-2021:1245-1 |
| SLE HPC 15 | qemu | 2.11.2-9.43.1 | SUSE-SU-2021:1244-1 |
| SUSE OpenStack Cloud Crowbar 9 | qemu | 2.11.2-5.29.1 | SUSE-SU-2021:1241-1 |
| SUSE OpenStack Cloud Crowbar 8 | qemu | 2.9.1-6.47.1 | SUSE-SU-2021:1240-1 |
| SUSE OpenStack Cloud 9 | qemu | 2.11.2-5.29.1 | SUSE-SU-2021:1241-1 |
| SUSE OpenStack Cloud 8 | qemu | 2.9.1-6.47.1 | SUSE-SU-2021:1240-1 |
| SUSE Manager Server 4.0 | qemu | 3.1.1.1-9.24.3 | SUSE-SU-2021:1245-1 |
| SUSE Manager Retail Branch Server 4.0 | qemu | 3.1.1.1-9.24.3 | SUSE-SU-2021:1245-1 |
| SUSE Manager Proxy 4.0 | qemu | 3.1.1.1-9.24.3 | SUSE-SU-2021:1245-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kvm | 1.4.2-53.41.1 | SUSE-SU-2021:14774-1 |
| SUSE HPE Helion OpenStack 8 | qemu | 2.9.1-6.47.1 | SUSE-SU-2021:1240-1 |
| SUSE Enterprise Storage 6 | qemu | 3.1.1.1-9.24.3 | SUSE-SU-2021:1245-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.2 | qemu +2 | 4.2.1-lp152.9.6.1 | openSUSE-SU-2020:1664-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | qemu | 5.1.0-r1 | — |
| Alpine v3.23 | qemu | 5.1.0-r1 | — |
| Alpine v3.22 | qemu | 5.1.0-r1 | — |
| Alpine v3.21 | qemu | 5.1.0-r1 | — |
| Alpine v3.20 | qemu | 5.1.0-r1 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | qemu | 5.1.0-r1 | — |
| Alpine v3.18 | qemu | 5.1.0-r1 | — |
| Alpine v3.17 | qemu | 5.1.0-r1 | — |
| Alpine v3.16 | qemu | 5.1.0-r1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | qemu +12 | 15:4.2.1-4.el7 | ELSA-2021-9034 |
Advisories 15
- WID-SEC-2022-1091 QEMU: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Jun 29, 2026
- USN-4467-1 qemu vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-4760-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2288-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:2743-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1305-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1240-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:14772-1 Security update for kvm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2877-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1245-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1241-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:14774-1 Security update for kvm SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1664-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1244-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2021-9034 Important: qemu security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 8, 2021
References
- https://lists.nongnu.org/archive/html/qemu-devel/2020-07/msg03497.html
- http://www.openwall.com/lists/oss-security/2020/07/22/1
- https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=5519724a13664b43e225ca05351c60b4468e4555
- https://lists.nongnu.org/archive/html/qemu-devel/2020-07/msg05745.html
- USN-4467-1 vendor-advisory
- DSA-4760 vendor-advisory
- openSUSE-SU-2020:1664 vendor-advisory
- GLSA-202208-27 vendor-advisory