Description
An out-of-bounds read issue was discovered in the HTTP/2 protocol decoder in HAProxy 1.8.x and 1.9.x through 1.9.0 which can result in a crash. The processing of the PRIORITY flag in a HEADERS frame requires 5 extra bytes, and while these bytes are skipped, the total frame length was not re-checked to make sure they were present in the frame.
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 | haproxy | 1.8.16-2 | — |
| Debian 13 | haproxy | 1.8.16-2 | — |
| Debian 12 | haproxy | 1.8.16-2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | haproxy | 1.8.8-1ubuntu0.3 | USN-3858-1 |
| Ubuntu 16.04 LTS | haproxy | 1.6.3-1ubuntu0.2 | USN-3858-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 3 | rh-haproxy18-haproxy +1 | 1.8.4-4.el7 | RHSA-2019:0275 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenShift 3 | atomic-enterprise-service-catalog +1 | 1:3.11.82-1.git.1673.133961e.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | atomic-openshift +12 | 3.11.82-1.git.0.08bc31b.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | atomic-openshift-cluster-autoscaler | 3.11.82-1.git.0.efb6af0.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | atomic-openshift-descheduler | 3.11.82-1.git.300.89765c9.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | atomic-openshift-dockerregistry | 3.11.82-1.git.452.0ce6383.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | atomic-openshift-metrics-server | 3.11.82-1.git.52.2fdca3f.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | atomic-openshift-node-problem-detector | 3.11.82-1.git.254.a448936.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | atomic-openshift-service-idler | 3.11.82-1.git.14.e353758.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | atomic-openshift-web-console | 3.11.82-1.git.355.5e8b1d9.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | golang-github-openshift-oauth-proxy | 3.11.82-1.git.425.7cac034.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | haproxy +1 | 1.8.17-3.el7 | RHSA-2019:0548, RHSA-2019:0547, RHBA-2019:0326 |
| Red Hat OpenShift 3 | jenkins | 2.150.2.1549032159-1.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | jenkins-2-plugins | 3.11.1549642489-1.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | openshift-ansible +4 | 3.11.82-3.git.0.9718d0a.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | openshift-enterprise-autoheal | 3.11.82-1.git.219.0b5aff4.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | openshift-enterprise-cluster-capacity | 3.11.82-1.git.380.cf11c51.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | prometheus +1 | 3.11.82-1.git.5027.9d24833.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | prometheus-alertmanager +1 | 3.11.82-1.git.0.3bf41ce.el7 | RHBA-2019:0326 |
| Red Hat OpenShift 3 | prometheus-node-exporter +1 | 3.11.82-1.git.1063.48444e8.el7 | RHBA-2019:0326 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | haproxy | 1.8.17~git0.e89d25b2-3.9.1 | SUSE-SU-2019:0232-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | haproxy | 2.4.4+git0.acb1d0bea-1.2 | openSUSE-SU-2024:10839-1 |
Advisories 7
- RHBA-2019:0326 Red Hat Bug Fix Advisory: OpenShift Container Platform 3.11 bug fix update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2019:0548 Red Hat Security Advisory: OpenShift Container Platform 3.10 haproxy security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2019:0547 Red Hat Security Advisory: OpenShift Container Platform 3.9 haproxy security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2019:0275 Red Hat Security Advisory: rh-haproxy18-haproxy security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-3858-1 haproxy vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2019:0232-1 Security update for haproxy SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10839-1 haproxy-2.4.4+git0.acb1d0bea-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 106645 vdb-entry
- RHSA-2019:0275 vendor-advisory
- [opensuse-security-announce] 20190213 [security-announce] openSUSE-SU-2019:0166-1: important: Security update for haproxy mailing-list
- 3858-1 vendor-advisory
- [haproxy@formilux.org] 20190108 [ANNOUNCE] haproxy-1.8.17 mailing-list
- RHBA-2019:0327 vendor-advisory