Description
tcp_emu in slirp/tcp_subr.c (aka slirp/src/tcp_subr.c) in QEMU 3.0.0 uses uninitialized data in an snprintf call, leading to Information disclosure.
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 | 1:3.1+dfsg-6 | — |
| Debian 14 | slirp4netns | 0.3.1-1 | — |
| Debian 13 | qemu | 1:3.1+dfsg-6 | — |
| Debian 13 | slirp4netns | 0.3.1-1 | — |
| Debian 12 | qemu | 1:3.1+dfsg-6 | — |
| Debian 12 | slirp4netns | 0.3.1-1 | — |
| Debian 9 | qemu | 1:2.8+dfsg-6+deb9u6 | DSA-4454-1 |
| Debian 8 | qemu | 1:2.1+dfsg-12+deb8u11 | DLA-1781-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | qemu | 1:2.11+dfsg-1ubuntu7.13 | USN-3978-1 |
| Ubuntu 16.04 LTS | qemu | 1:2.5+dfsg-5ubuntu10.38 | USN-3978-1 |
| Ubuntu 14.04 LTS | qemu | 2.0.0+dfsg-2ubuntu1.46 | USN-3978-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | SLOF | 20171214-6.gitfa98132.module+el8.1.0+4066+0f1aadab | RHSA-2019:3345 |
| RHEL 8 | hivex +6 | 1.3.15-7.module+el8.1.0+4066+0f1aadab | RHSA-2019:3345 |
| RHEL 8 | libguestfs-winsupport | 8.0-4.module+el8.1.0+4066+0f1aadab | RHSA-2019:3345 |
| RHEL 8 | libiscsi +2 | 1.18.0-8.module+el8.1.0+4066+0f1aadab | RHSA-2019:3345 |
| RHEL 8 | libvirt +27 | 4.5.0-35.module+el8.1.0+4227+b2722cb3 | RHSA-2019:3345 |
| RHEL 8 | libvirt-dbus | 1.2.0-3.module+el8.1.0+4066+0f1aadab | RHSA-2019:3345 |
| RHEL 8 | libvirt-python +1 | 4.5.0-2.module+el8.1.0+4066+0f1aadab | RHSA-2019:3345 |
| RHEL 8 | nbdkit +9 | 1.4.2-5.module+el8.1.0+4066+0f1aadab | RHSA-2019:3345 |
| RHEL 8 | netcf +2 | 0.2.8-12.module+el8.1.0+4066+0f1aadab | RHSA-2019:3345 |
| RHEL 8 | perl-Sys-Virt | 4.5.0-5.module+el8.1.0+4066+0f1aadab | RHSA-2019:3345 |
| RHEL 8 | qemu-img +10 | 15:2.12.0-88.module+el8.1.0+4233+bc44be3f | RHSA-2019:3345 |
| RHEL 8 | seabios +2 | 1.11.1-4.module+el8.1.0+4066+0f1aadab | RHSA-2019:3345 |
| RHEL 8 | sgabios +1 | 1:0.20170427git-3.module+el8.1.0+4066+0f1aadab | RHSA-2019:3345 |
| RHEL 8 | supermin +1 | 5.1.19-9.module+el8.1.0+4066+0f1aadab | RHSA-2019:3345 |
| RHEL 8 | virt-dib +26 | 1:1.38.4-14.module+el8.1.0+4066+0f1aadab | RHSA-2019:3345 |
| RHEL 7 | qemu-img +3 | 10:1.5.3-167.el7 | RHSA-2019:2078 |
| RHEL 7 | qemu-img-rhev +3 | 10:2.12.0-33.el7 | RHSA-2019:2553 |
| RHEL 6 | qemu-img +3 | 2:0.12.1.2-2.506.el6_10.4 | RHSA-2019:1650 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Manager 4 | qemu-img-rhev +3 | 10:2.12.0-33.el7 | RHSA-2019:2553 |
| Red Hat OpenStack 14 | qemu-img-rhev +3 | 10:2.12.0-33.el7 | RHSA-2019:2425 |
| Red Hat OpenStack 13 | qemu-img-rhev +3 | 10:2.12.0-33.el7 | RHSA-2019:2425 |
| Red Hat OpenStack 10 | qemu-img-rhev +3 | 10:2.12.0-33.el7 | RHSA-2019:2425 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | libiscsi +2 | 1.18.0-8.module_el8.3.0+2048+e7a0a3ea | ALSA-2019:3345 |
| AlmaLinux 8 | netcf +2 | 0.2.8-12.module_el8.3.0+2048+e7a0a3ea | ALSA-2019:3345 |
| AlmaLinux 8 | sgabios | 1:0.20170427git-3.module_el8.3.0+2048+e7a0a3ea | ALSA-2019:3345 |
| AlmaLinux 8 | sgabios-bin | 1:0.20170427git-3.module_el8.5.0+2608+72063365 | ALSA-2019:3345 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | libiscsi | 1.18.0-8.module+el8.4.0+534+4680a14e | RLSA-2019:3345 |
| Rocky Linux 8 | netcf | 0.2.8-12.module+el8.4.0+534+4680a14e | RLSA-2019:3345 |
| Rocky Linux 8 | sgabios | 1:0.20170427git-3.module+el8.4.0+534+4680a14e | RLSA-2019:3345 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | qemu | 2.11.2-9.25.1 | SUSE-SU-2019:1239-1 |
| SLES 12 SP4 | qemu | 2.11.2-5.13.1 | SUSE-SU-2019:1238-1 |
| SLES 12 SP4 | xen | 4.11.1_04-2.6.1 | SUSE-SU-2019:0891-1 |
| SLES 12 SP2 | qemu | 2.6.2-41.52.1 | SUSE-SU-2019:1268-1 |
| SLES 12 SP2 | xen | 4.7.6_06-43.48.1 | SUSE-SU-2019:0921-1 |
| SLES 12 SP1 | qemu | 2.3.1-33.23.1 | SUSE-SU-2019:1269-1 |
| SLES 12 SP1 | xen | 4.5.5_28-22.58.1 | SUSE-SU-2019:0825-1 |
| SLES 12 | qemu | 2.0.2-48.52.1 | SUSE-SU-2019:1272-1 |
| SLES 12 | xen | 4.4.4_40-22.77.1 | SUSE-SU-2019:0827-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | kvm | 1.4.2-60.24.1 | SUSE-SU-2019:14052-1 |
| SLES 11 SP4 | xen | 4.4.4_40-61.43.2 | SUSE-SU-2019:14001-1 |
| SLES for SAP 12 SP4 | qemu | 2.11.2-5.13.1 | SUSE-SU-2019:1238-1 |
| SLES for SAP 12 SP4 | xen | 4.11.1_04-2.6.1 | SUSE-SU-2019:0891-1 |
| SLES for SAP 12 SP2 | qemu | 2.6.2-41.52.1 | SUSE-SU-2019:1268-1 |
| SLES for SAP 12 SP2 | xen | 4.7.6_06-43.48.1 | SUSE-SU-2019:0921-1 |
| SLES for SAP 12 SP1 | qemu | 2.3.1-33.23.1 | SUSE-SU-2019:1269-1 |
| SLES for SAP 12 SP1 | xen | 4.5.5_28-22.58.1 | SUSE-SU-2019:0825-1 |
| SLES for SAP 11 SP4 | xen | 4.4.4_40-61.43.2 | SUSE-SU-2019:14001-1 |
| SUSE OpenStack Cloud 7 | qemu | 2.6.2-41.52.1 | SUSE-SU-2019:1268-1 |
| SUSE OpenStack Cloud 7 | xen | 4.7.6_06-43.48.1 | SUSE-SU-2019:0921-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kvm | 1.4.2-53.32.1 | SUSE-SU-2019:14053-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | xen | 4.2.5_21-45.30.1 | SUSE-SU-2019:14011-1 |
| SUSE Enterprise Storage 4 | qemu | 2.6.2-41.52.1 | SUSE-SU-2019:1268-1 |
| SUSE Enterprise Storage 4 | xen | 4.7.6_06-43.48.1 | SUSE-SU-2019:0921-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qemu | 6.1.0-32.1 | openSUSE-SU-2024:11287-1 |
| openSUSE Leap 15.0 | qemu | 2.11.2-lp150.7.22.1 | openSUSE-SU-2019:1405-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | qemu +26 | 10:3.1.0-7.amzn2.0.1 | ALAS2-2019-1248 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | hivex +6 | 1.3.15-7.module+el8.1.0+5378+c5e0f4d7 | ELSA-2019-3345 |
| Oracle Linux 8 | libguestfs-winsupport | 8.0-4.module+el8.1.0+5378+c5e0f4d7 | ELSA-2019-3345 |
| Oracle Linux 8 | libiscsi +2 | 1.18.0-8.module+el8.1.0+5378+c5e0f4d7 | ELSA-2019-3345 |
| Oracle Linux 8 | libvirt +27 | 4.5.0-35.0.1.module+el8.1.0+5378+c5e0f4d7 | ELSA-2019-3345 |
| Oracle Linux 8 | libvirt-dbus | 1.2.0-3.module+el8.1.0+5378+c5e0f4d7 | ELSA-2019-3345 |
| Oracle Linux 8 | nbdkit +9 | 1.4.2-5.module+el8.1.0+5378+c5e0f4d7 | ELSA-2019-3345 |
| Oracle Linux 8 | netcf +2 | 0.2.8-12.module+el8.1.0+5378+c5e0f4d7 | ELSA-2019-3345 |
| Oracle Linux 8 | perl-Sys-Virt | 4.5.0-5.module+el8.1.0+5378+c5e0f4d7 | ELSA-2019-3345 |
| Oracle Linux 8 | python3-libvirt | 4.5.0-2.module+el8.1.0+5378+c5e0f4d7 | ELSA-2019-3345 |
| Oracle Linux 8 | qemu-img +10 | 15:2.12.0-88.0.1.module+el8.1.0+5378+c5e0f4d7 | ELSA-2019-3345 |
| Oracle Linux 8 | seabios +2 | 1.11.1-4.module+el8.1.0+5378+c5e0f4d7 | ELSA-2019-3345 |
| Oracle Linux 8 | sgabios +1 | 1:0.20170427git-3.module+el8.1.0+5378+c5e0f4d7 | ELSA-2019-3345 |
| Oracle Linux 8 | supermin +1 | 5.1.19-9.module+el8.1.0+5378+c5e0f4d7 | ELSA-2019-3345 |
| Oracle Linux 8 | virt-dib +26 | 1:1.38.4-14.0.1.module+el8.1.0+5378+c5e0f4d7 | ELSA-2019-3345 |
| Oracle Linux 7 | qemu +8 | 15:3.1.0-3.el7 | ELSA-2019-4640 |
| Oracle Linux 7 | qemu-img +3 | 10:1.5.3-167.el7 | ELSA-2019-4640, ELSA-2019-2078 |
Advisories 30
- ALSA-2019:3345 Low: virt:rhel security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 5, 2026
- RHSA-2019:3345 Red Hat Security Advisory: virt:rhel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2019:2553 Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2019:2425 Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2019:2078 Red Hat Security Advisory: qemu-kvm security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2019:1650 Red Hat Security Advisory: qemu-kvm security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-3978-1 qemu update Ubuntu Security Notices (USN) · Jun 1, 2026
- DSA-4454-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1781-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2019:3345 Low: virt:rhel security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 5, 2026
- SUSE-SU-2019:14011-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1269-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1238-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14001-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1272-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14053-1 Security update for kvm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0921-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14052-1 Security update for kvm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0825-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0827-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1239-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0891-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1405-1 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-2019:1268-1 Security update for qemu SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2024-1989 QEMU: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Sep 2, 2024
- ELSA-2019-3345 Low: virt:ol security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 14, 2019
- ELSA-2019-2078 Low: qemu-kvm security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 13, 2019
- ALAS2-2019-1248 Important: qemu security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 22, 2019
- ELSA-2019-4640 Important: qemu security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 14, 2019
References
- https://lists.gnu.org/archive/html/qemu-devel/2019-03/msg00400.html
- RHSA-2019:1650 vendor-advisory
- FEDORA-2019-52a8f5468e vendor-advisory
- RHSA-2019:2078 vendor-advisory
- RHSA-2019:2425 vendor-advisory
- RHSA-2019:2553 vendor-advisory
- RHSA-2019:3345 vendor-advisory