CVE-2018-20124
MEDIUMCVSS 5.5/10EPSS 0.49%
Last modified
CVE-2018-20124 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. hw/rdma/rdma_backend.c in QEMU allows guest OS users to trigger out-of-bounds access via a PvrdmaSqWqe ring element with a large num_sge value.. EPSS estimates a 0.49% chance of exploitation in the next 30 days.
Description
hw/rdma/rdma_backend.c in QEMU allows guest OS users to trigger out-of-bounds access via a PvrdmaSqWqe ring element with a large num_sge value.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | <= 3.1.0 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.04 |
| Canonical | Ubuntu Linux | 18.10 |
References
- http://www.openwall.com/lists/oss-security/2018/12/18/2Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/106290Third Party Advisory, VDB Entry
- https://lists.gnu.org/archive/html/qemu-devel/2018-12/msg02822.htmlPatch, Third Party Advisory
- https://usn.ubuntu.com/3923-1/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2018/12/18/2Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/106290Third Party Advisory, VDB Entry
- https://lists.gnu.org/archive/html/qemu-devel/2018-12/msg02822.htmlPatch, Third Party Advisory
- https://usn.ubuntu.com/3923-1/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2018-20124?
hw/rdma/rdma_backend.c in QEMU allows guest OS users to trigger out-of-bounds access via a PvrdmaSqWqe ring element with a large num_sge value.
How severe is CVE-2018-20124?
CVE-2018-20124 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.49% probability of exploitation in the next 30 days.
How do I fix CVE-2018-20124?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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Are you affected by CVE-2018-20124?
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Scan your code nowSource: NVD / NIST