Description
Buffer overflow in the pcnet_receive function in hw/net/pcnet.c in QEMU, when a guest NIC has a larger MTU, allows remote attackers to cause a denial of service (guest OS crash) or execute arbitrary code via a large packet.
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 | 1:2.5+dfsg-1 | — |
| Debian 13 | qemu | 1:2.5+dfsg-1 | — |
| Debian 12 | qemu | 1:2.5+dfsg-1 | — |
| Debian 8 | qemu | 1:2.1+dfsg-12+deb8u5a | DSA-3471-1 |
| Debian 7 | qemu | 1.1.2+dfsg-6a+deb7u12 | DSA-3469-1 |
| Debian 7 | qemu-kvm | 1.1.2+dfsg-6+deb7u12 | DSA-3470-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | qemu | 2.0.0+dfsg-2ubuntu1.21 | USN-2828-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | qemu-img +6 | 2:0.12.1.2-2.479.el6_7.3 | RHSA-2015:2696, RHSA-2015:2694 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 5 | qemu-img-rhev +2 | 2:0.12.1.2-2.479.el6_7.3 | RHSA-2015:2695 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | qemu | 2.3.1-7.7 | SUSE-SU-2016:0459-1 |
| SLES 12 SP1 | xen | 4.5.2_06-7.1 | SUSE-SU-2016:0873-1 |
| SLES 12 | qemu | 2.0.2-48.12.1 | SUSE-SU-2016:0021-1 |
| SLES 12 | xen | 4.4.4_02-22.19.1 | SUSE-SU-2016:1318-1 |
| SLES 11 SP4 | kvm | 1.4.2-35.1 | SUSE-SU-2016:0010-1 |
| SLES 11 SP4 | xen | 4.4.4_02-32.1 | SUSE-SU-2016:0955-1 |
| SLES 11 SP3 | kvm | 1.4.2-37.1 | SUSE-SU-2016:0020-1 |
| SLES 11 SP3 | xen | 4.2.5_20-24.9 | SUSE-SU-2016:1745-1 |
| SLES 11 SP2 | xen | 4.1.6_08-26.1 | SUSE-SU-2016:1154-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | qemu | 2.3.1-7.7 | SUSE-SU-2016:0459-1 |
| SLES for SAP 12 SP1 | xen | 4.5.2_06-7.1 | SUSE-SU-2016:0873-1 |
| SLES for SAP 12 | qemu | 2.0.2-48.12.1 | SUSE-SU-2016:0021-1 |
| SLES for SAP 12 | xen | 4.4.4_02-22.19.1 | SUSE-SU-2016:1318-1 |
| SLES for SAP 11 SP4 | kvm | 1.4.2-35.1 | SUSE-SU-2016:0010-1 |
| SLES for SAP 11 SP4 | xen | 4.4.4_02-32.1 | SUSE-SU-2016:0955-1 |
| SLES for SAP 11 SP3 | kvm | 1.4.2-37.1 | SUSE-SU-2016:0020-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.7.0_12-1.3 | openSUSE-SU-2024:10196-1 |
Advisories 17
- RHSA-2015:2695 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2015:2696 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2015:2694 Red Hat Security Advisory: qemu-kvm security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- DSA-3471-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3469-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3470-1 qemu-kvm - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2828-1 qemu, qemu-kvm vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2016:0020-1 Security update for kvm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1318-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0010-1 Security update for kvm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0021-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0459-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0955-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1154-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10196-1 xen-4.7.0_12-1.3 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2016:1745-1 Security update for xen SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2016:0873-1 Security update for xen SUSE / openSUSE Security Updates · May 2, 2025
References
- RHSA-2015:2694 vendor-advisory
- [oss-security] 20151130 CVE-2015-7512 Qemu: net: pcnet: buffer overflow in non-loopback mode mailing-list
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=8b98a2f07175d46c3f7217639bd5e03f
- DSA-3469 vendor-advisory
- DSA-3470 vendor-advisory
- 78230 vdb-entry
- 1034527 vdb-entry
- DSA-3471 vendor-advisory
- GLSA-201602-01 vendor-advisory
- RHSA-2015:2696 vendor-advisory
- RHSA-2015:2695 vendor-advisory