Description
The dhcp_decode function in slirp/bootp.c in QEMU (aka Quick Emulator) allows local guest OS users to cause a denial of service (out-of-bounds read and QEMU process crash) via a crafted DHCP options string.
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 | 1:2.8+dfsg-7 | — |
| Debian 13 | qemu | 1:2.8+dfsg-7 | — |
| Debian 12 | qemu | 1:2.8+dfsg-7 | — |
| Debian 9 | qemu | 1:2.8+dfsg-6+deb9u2 | DSA-3925-1 |
| Debian 8 | qemu | 1:2.1+dfsg-12+deb8u7 | DLA-1497-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | qemu +1 | 1.1.2+dfsg-6+deb7u23 | DLA-1071-1, DLA-1070-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | qemu | 1:2.5+dfsg-5ubuntu10.15 | USN-3414-1 |
| Ubuntu 14.04 LTS | qemu | 2.0.0+dfsg-2ubuntu1.35 | USN-3414-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | qemu | 2.9.0-6.3.1 | SUSE-SU-2017:2416-1 |
| SLES 12 SP3 | xen | 4.9.0_11-3.9.1 | SUSE-SU-2017:2327-2, SUSE-SU-2017:2327-1 |
| SLES 12 SP2 | qemu | 2.6.2-41.22.2 | SUSE-SU-2017:2936-1 |
| SLES 12 SP2 | xen | 4.7.3_03-43.9.1 | SUSE-SU-2017:2326-1 |
| SLES 12 SP1 | qemu | 2.3.1-33.3.3 | SUSE-SU-2017:2946-1 |
| SLES 12 SP1 | xen | 4.5.5_14-22.25.1 | SUSE-SU-2017:2319-1 |
| SLES 12 | qemu | 2.0.2-48.34.3 | SUSE-SU-2017:2969-1 |
| SLES 12 | xen | 4.4.4_22-22.51.2 | SUSE-SU-2017:2541-1 |
| SLES 11 SP4 | kvm | 1.4.2-60.3.1 | SUSE-SU-2017:2963-1 |
| SLES 11 SP4 | xen | 4.4.4_22-61.9.2 | SUSE-SU-2017:2450-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP3 | kvm | 1.4.2-53.11.1 | SUSE-SU-2017:3084-1 |
| SLES 11 SP3 | xen | 4.2.5_21-45.5.1 | SUSE-SU-2017:2339-1 |
| SLES for SAP 12 SP3 | qemu | 2.9.0-6.3.1 | SUSE-SU-2017:2416-1 |
| SLES for SAP 12 SP3 | xen | 4.9.0_11-3.9.1 | SUSE-SU-2017:2327-2 |
| SLES for SAP 12 SP2 | qemu | 2.6.2-41.22.2 | SUSE-SU-2017:2936-1 |
| SLES for SAP 12 SP2 | xen | 4.7.3_03-43.9.1 | SUSE-SU-2017:2326-1 |
| SLES for SAP 12 SP1 | qemu | 2.3.1-33.3.3 | SUSE-SU-2017:2946-1 |
| SLES for SAP 12 SP1 | xen | 4.5.5_14-22.25.1 | SUSE-SU-2017:2319-1 |
| SLES for SAP 12 | xen | 4.4.4_22-22.51.2 | SUSE-SU-2017:2541-1 |
| SLES for SAP 11 SP4 | kvm | 1.4.2-60.3.1 | SUSE-SU-2017:2963-1 |
| SLES for SAP 11 SP4 | xen | 4.4.4_22-61.9.2 | SUSE-SU-2017:2450-1 |
| SUSE OpenStack Cloud 6 | qemu | 2.3.1-33.3.3 | SUSE-SU-2017:2946-1 |
| SUSE OpenStack Cloud 6 | xen | 4.5.5_14-22.25.1 | SUSE-SU-2017:2319-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kvm | 1.4.2-53.11.1 | SUSE-SU-2017:3084-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | xen | 4.2.5_21-45.5.1 | SUSE-SU-2017:2339-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qemu | 6.1.0-32.1 | openSUSE-SU-2024:11287-1 |
Advisories 19
- DLA-1497-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3925-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1071-1 qemu-kvm - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1070-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3414-1 qemu vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2017:2450-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2326-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2339-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2969-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2963-1 Security update for kvm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2319-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2541-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:3084-1 Security update for kvm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2327-2 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2416-1 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-2017:2327-1 Security update for xen SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2017:2936-1 Security update for qemu SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2017:2946-1 Security update for qemu SUSE / openSUSE Security Updates · May 2, 2025
References
- [debian-lts-announce] 20180906 [SECURITY] [DLA 1497-1] qemu security update mailing-list
- 99923 vdb-entry
- [qemu-devel] 20170717 [PATCH] slirp: check len against dhcp options array end mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=1472611
- [oss-security] 20170719 CVE-2017-11434 Qemu: slirp: out-of-bounds read while parsing dhcp options mailing-list
- DSA-3925 vendor-advisory