Description
Qemu through 2.10.0 allows remote attackers to cause a memory leak by triggering slow data-channel read operations, related to io/channel-websock.c.
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 | 1:2.11+dfsg-1 | — |
| Debian 13 | qemu | 1:2.11+dfsg-1 | — |
| Debian 12 | qemu | 1:2.11+dfsg-1 | — |
| Debian 9 | qemu | 1:2.8+dfsg-6+deb9u4 | DSA-4213-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | qemu-img +3 | 10:1.5.3-156.el7 | RHSA-2018:0816 |
| RHEL 7 | qemu-img-rhev +3 | 10:2.10.0-21.el7 | RHSA-2018:1104 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 12 | qemu-img-rhev +3 | 10:2.10.0-21.el7 | RHSA-2018:1113 |
| Red Hat OpenStack 11 | qemu-img-rhev +3 | 10:2.10.0-21.el7 | RHSA-2018:1113 |
| Red Hat OpenStack 10 | qemu-img-rhev +3 | 10:2.10.0-21.el7 | RHSA-2018:1113 |
| Red Hat OpenStack 9 | qemu-img-rhev +3 | 10:2.10.0-21.el7 | RHSA-2018:1113 |
| Red Hat OpenStack 8 | qemu-img-rhev +3 | 10:2.10.0-21.el7 | RHSA-2018:1113 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | qemu | 2.9.1-6.6.3 | SUSE-SU-2017:2924-1 |
| SLES 12 SP2 | qemu | 2.6.2-41.22.2 | SUSE-SU-2017:2936-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | qemu | 2.9.1-6.6.3 | SUSE-SU-2017:2924-1 |
| SLES for SAP 12 SP2 | qemu | 2.6.2-41.22.2 | SUSE-SU-2017:2936-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qemu | 6.1.0-32.1 | openSUSE-SU-2024:11287-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | qemu-img +3 | 10:1.5.3-156.amzn2.2.3 | ALAS2-2018-1034 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | qemu +10 | 15:3.0.0-1.el7 | ELSA-2019-4585, ELSA-2018-4289, ELSA-2018-4285 |
| Oracle Linux 7 | qemu-img +3 | 10:1.5.3-156.el7 | ELSA-2019-4585, ELSA-2018-4289, ELSA-2018-4285 |
Advisories 13
- RHSA-2018:1113 Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2018:1104 Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2018:0816 Red Hat Security Advisory: qemu-kvm security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- DSA-4213-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2017:2924-1 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-2017:2936-1 Security update for qemu SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2024-2013 QEMU: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Sep 2, 2024
- ELSA-2019-4585 Important: qemu security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 15, 2019
- ELSA-2018-4289 Important: qemu security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 28, 2018
- ELSA-2018-4285 Important: qemu security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 20, 2018
- ALAS2-2018-1034 Important: qemu-kvm security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 11, 2018
- ELSA-2018-0816 Low: qemu-kvm security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 16, 2018
References
- DSA-4213 vendor-advisory
- RHSA-2018:0816 vendor-advisory
- 101277 vdb-entry
- RHSA-2018:1104 vendor-advisory
- https://bugs.launchpad.net/qemu/+bug/1718964
- USN-3575-1 vendor-advisory
- [qemu-devel] 20171010 [PATCH v1 1/7] io: monitor encoutput buffer size from websocket GSource mailing-list