Description
An assertion-failure flaw was found in Qemu before 2.10.1, in the Network Block Device (NBD) server's initial connection negotiation, where the I/O coroutine was undefined. This could crash the qemu-nbd server if a client sent unexpected data during connection negotiation. A remote user or process could use this flaw to crash the qemu-nbd server resulting in denial of service.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| QEMU | Qemu | 2.10.1 | — |
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.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | qemu-img-rhev +3 | 10:2.9.0-16.el7_4.5 | RHSA-2017:2628 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 11 | qemu-img-rhev +3 | 10:2.9.0-16.el7_4.11 | RHSA-2017:3466 |
| Red Hat OpenStack 10 | qemu-img-rhev +3 | 10:2.9.0-16.el7_4.11 | RHSA-2017:3474 |
| Red Hat OpenStack 9 | qemu-img-rhev +3 | 10:2.9.0-16.el7_4.11 | RHSA-2017:3470 |
| Red Hat OpenStack 8 | qemu-img-rhev +3 | 10:2.9.0-16.el7_4.11 | RHSA-2017:3471 |
| Red Hat OpenStack 7 | qemu-img-rhev +3 | 10:2.9.0-16.el7_4.11 | RHSA-2017:3472 |
| Red Hat OpenStack 6 | qemu-img-rhev +3 | 10:2.9.0-16.el7_4.11 | RHSA-2017:3473 |
Advisories 7
- RHSA-2017:3473 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:3474 Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:3471 Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:3472 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:3466 Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:3470 Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:2628 Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
References
- RHSA-2017:2628 vendor-advisory
- https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=2b0bbc4f8809c972bad134bc1a2570dbb01dea0b
- RHSA-2017:3473 vendor-advisory
- RHSA-2017:3470 vendor-advisory
- RHSA-2017:3472 vendor-advisory
- RHSA-2017:3474 vendor-advisory
- RHSA-2017:3471 vendor-advisory
- https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=ff82911cd3f69f028f2537825c9720ff78bc3f19
- [oss-security] 20170721 CVE-2017-7539 Qemu: qemu-nbd crashes due to undefined I/O coroutine mailing-list
- RHSA-2017:3466 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7539
- 99944 vdb-entry