Description
Integer overflow in the net_tx_pkt_init function in hw/net/net_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU process crash) via the maximum fragmentation count, which triggers an unchecked multiplication and NULL pointer dereference.
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 | 1:2.6+dfsg-3.1 | — |
| Debian 13 | qemu | 1:2.6+dfsg-3.1 | — |
| Debian 12 | qemu | 1:2.6+dfsg-3.1 | — |
| Debian 8 | qemu | 1:2.1+dfsg-12+deb8u8 | DLA-1599-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | qemu | 1:2.5+dfsg-5ubuntu10.6 | USN-3125-1 |
| Ubuntu 14.04 LTS | qemu | 2.0.0+dfsg-2ubuntu1.30 | USN-3125-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | qemu-img-rhev +3 | 10:2.9.0-14.el7 | RHSA-2017:2392 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 11 | qemu-img-rhev +3 | 10:2.9.0-10.el7 | RHSA-2017:2408 |
| Red Hat OpenStack 10 | qemu-img-rhev +3 | 10:2.9.0-10.el7 | RHSA-2017:2408 |
| Red Hat OpenStack 9 | qemu-img-rhev +3 | 10:2.9.0-10.el7 | RHSA-2017:2408 |
| Red Hat OpenStack 8 | qemu-img-rhev +3 | 10:2.9.0-10.el7 | RHSA-2017:2408 |
| Red Hat OpenStack 7 | qemu-img-rhev +3 | 10:2.9.0-10.el7 | RHSA-2017:2408 |
| Red Hat OpenStack 6 | qemu-img-rhev +3 | 10:2.9.0-10.el7 | RHSA-2017:2408 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | qemu | 2.3.1-21.1 | SUSE-SU-2016:2589-1 |
| SLES 12 SP1 | xen | 4.5.3_10-20.1 | SUSE-SU-2016:2473-1 |
| SLES 12 | qemu | 2.0.2-48.22.1 | SUSE-SU-2016:2781-1 |
| SLES 12 | xen | 4.4.4_04-22.22.2 | SUSE-SU-2016:2533-1 |
| SLES 11 SP4 | xen | 4.4.4_08-40.2 | SUSE-SU-2016:2507-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | qemu | 2.3.1-21.1 | SUSE-SU-2016:2589-1 |
| SLES for SAP 12 SP1 | xen | 4.5.3_10-20.1 | SUSE-SU-2016:2473-1 |
| SLES for SAP 12 | qemu | 2.0.2-48.22.1 | SUSE-SU-2016:2781-1 |
| SLES for SAP 12 | xen | 4.4.4_04-22.22.2 | SUSE-SU-2016:2533-1 |
| SLES for SAP 11 SP4 | xen | 4.4.4_08-40.2 | SUSE-SU-2016:2507-1 |
Advisories 9
- RHSA-2017:2392 Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:2408 Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- DLA-1599-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3125-1 qemu, qemu-kvm vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2016:2507-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2781-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2589-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2473-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2533-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 92556 vdb-entry
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=47882fa4975bf0b58dd74474329fdd7154e8f04c
- [oss-security] 20160819 CVE Request: Qemu: net: vmxnet: integer overflow in packet initialisation mailing-list
- RHSA-2017:2392 vendor-advisory
- GLSA-201609-01 vendor-advisory
- [qemu-devel] 20160818 [PULL 1/2] net: vmxnet: use g_new for pkt initialisation mailing-list
- [oss-security] 20160819 Re: CVE Request: Qemu: net: vmxnet: integer overflow in packet initialisation mailing-list
- [debian-lts-announce] 20181130 [SECURITY] [DLA 1599-1] qemu security update mailing-list
- RHSA-2017:2408 vendor-advisory