Description
Integer overflow in the virtio_net_handle_mac function in hw/net/virtio-net.c in QEMU 2.0 and earlier allows local guest users to execute arbitrary code via a MAC addresses table update request, which triggers a heap-based buffer overflow.
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 | 1.7.0+dfsg-8 | — |
| Debian 13 | qemu | 1.7.0+dfsg-8 | — |
| Debian 12 | qemu | 1.7.0+dfsg-8 | — |
| Debian 7 | qemu | 1.1.2+dfsg-6a+deb7u1 | DSA-2909-1 |
| Debian 7 | qemu-kvm | 1.1.2+dfsg-6+deb7u1 | DSA-2910-1 |
| Debian 6.0 | qemu | 0.12.5+dfsg-3squeeze4 | DSA-2909-1 |
| Debian 6.0 | qemu-kvm | 0.12.5+dfsg-5+squeeze11 | DSA-2910-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | qemu | 2.0.0~rc1+dfsg-0ubuntu3.1 | USN-2182-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | qemu-img +6 | 2:0.12.1.2-2.415.el6_5.8 | RHSA-2014:0421, RHSA-2014:0420 |
| RHEL 6 | rhev-hypervisor6 | 6.5-20140603.2.el6ev | RHSA-2014:0674 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 4 | qemu-img-rhev +2 | 2:0.12.1.2-2.415.el6_5.8 | RHSA-2014:0434 |
| Red Hat OpenStack 3 | qemu-img-rhev +2 | 2:0.12.1.2-2.415.el6_5.8 | RHSA-2014:0435 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qemu | 2.6.1-1.5 | openSUSE-SU-2024:10233-1 |
Advisories 9
- RHSA-2014:0674 Red Hat Security Advisory: rhev-hypervisor6 3.4.0 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:0434 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:0435 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:0421 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:0420 Red Hat Security Advisory: qemu-kvm security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2909-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-2910-1 qemu-kvm - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2182-1 qemu, qemu-kvm vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- openSUSE-SU-2024:10233-1 qemu-2.6.1-1.5 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1078846
- DSA-2910 vendor-advisory
- USN-2182-1 vendor-advisory
- DSA-2909 vendor-advisory
- 57878 third-party-advisory
- [Qemu-devel] 20140411 Re: [PATCH for-2.0] virtio-net: fix guest-triggerable buffer overrun mailing-list
- [Qemu-devel] 20140411 [PATCH for-2.0] virtio-net: fix guest-triggerable buffer overrun mailing-list
- 58191 third-party-advisory