Description
It was found that vdsm before version 4.20.37 invokes qemu-img on untrusted inputs without limiting resources. By uploading a specially crafted image, an attacker could cause the qemu-img process to consume unbounded amounts of memory of CPU time, causing a denial of service condition that could potentially impact other users of the host.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| [UNKNOWN] | vdsm | 4.20.37 | — |
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 | vdsm +20 | 4.20.39-1.el7ev | RHEA-2018:2624 |
Advisories 1
- RHEA-2018:2624 Red Hat Enhancement Advisory: VDSM bug fix and enhancement update 4.2 Red Hat Security Advisories (RHSA) · Jul 1, 2026