Description
qemu-bridge-helper.c in QEMU 3.1 and 4.0.0 does not ensure that a network interface name (obtained from bridge.conf or a --br=bridge option) is limited to the IFNAMSIZ size, which can lead to an ACL bypass.
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 | 1:4.1-1 | — |
| Debian 13 | qemu | 1:4.1-1 | — |
| Debian 12 | qemu | 1:4.1-1 | — |
| Debian 10 | qemu | 1:3.1+dfsg-8+deb10u2 | DSA-4512-1 |
| Debian 9 | qemu | 1:2.8+dfsg-6+deb9u8 | DSA-4506-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | qemu | 1:2.1+dfsg-12+deb8u12 | DLA-1927-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | qemu | 1:2.11+dfsg-1ubuntu7.20 | USN-4191-1 |
| Ubuntu 16.04 LTS | qemu | 1:2.5+dfsg-5ubuntu10.42 | USN-4191-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | qemu | 2.0.0+dfsg-2ubuntu1.47 | USN-4191-2 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | qemu | 3.1.1-9.3.3 | SUSE-SU-2019:2192-1 |
| SLES 15 | qemu | 2.11.2-9.28.3 | SUSE-SU-2019:2246-1 |
| SLES 12 SP4 | qemu | 2.11.2-5.18.1 | SUSE-SU-2019:2353-1 |
| SLES 12 SP2 | qemu | 2.6.2-41.55.1 | SUSE-SU-2019:2157-1 |
| SLES 12 SP1 | qemu | 2.3.1-33.26.1 | SUSE-SU-2019:2221-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | kvm | 1.4.2-60.27.1 | SUSE-SU-2019:14151-1 |
| SLES for SAP 12 SP4 | qemu | 2.11.2-5.18.1 | SUSE-SU-2019:2353-1 |
| SLES for SAP 12 SP2 | qemu | 2.6.2-41.55.1 | SUSE-SU-2019:2157-1 |
| SLES for SAP 12 SP1 | qemu | 2.3.1-33.26.1 | SUSE-SU-2019:2221-1 |
| SUSE OpenStack Cloud 7 | qemu | 2.6.2-41.55.1 | SUSE-SU-2019:2157-1 |
| SUSE Enterprise Storage 4 | qemu | 2.6.2-41.55.1 | SUSE-SU-2019:2157-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qemu | 6.1.0-32.1 | openSUSE-SU-2024:11287-1 |
| openSUSE Leap 15.1 | qemu +1 | 3.1.1-lp151.7.3.3 | openSUSE-SU-2019:2041-1 |
| openSUSE Leap 15.1 | qemu-linux-user | 3.1.1-lp151.7.3.2 | openSUSE-SU-2019:2041-1 |
| openSUSE Leap 15.0 | qemu | 2.11.2-lp150.7.25.1 | openSUSE-SU-2019:2059-1 |
Advisories 14
- USN-4191-2 qemu vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-4191-1 qemu vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-4506-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4512-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1927-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2019:2353-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2041-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14151-1 Security update for kvm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2221-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2059-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2192-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2246-1 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-2019:2157-1 Security update for qemu SUSE / openSUSE Security Updates · May 2, 2025
References
- https://lists.gnu.org/archive/html/qemu-devel/2019-07/msg00145.html
- [oss-security] 20190703 CVE-2019-13164 Qemu: qemu-bridge-helper ACL bypassed with long interface names mailing-list
- 109054 vdb-entry
- 20190825 [SECURITY] [DSA 4506-1] qemu security update mailing-list
- DSA-4506 vendor-advisory
- openSUSE-SU-2019:2041 vendor-advisory
- DSA-4512 vendor-advisory
- 20190902 [SECURITY] [DSA 4512-1] qemu security update mailing-list
- openSUSE-SU-2019:2059 vendor-advisory
- [debian-lts-announce] 20190920 [SECURITY] [DLA 1927-1] qemu security update mailing-list
- USN-4191-2 vendor-advisory
- USN-4191-1 vendor-advisory
- GLSA-202003-66 vendor-advisory
- https://github.com/qemu/qemu/commit/03d7712b4bcd47bfe0fe14ba2fffa87e111fa086