CVE-2018-17963
CRITICALCVSS 9.8/10EPSS 4.78%
Last modified
CVE-2018-17963 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. qemu_deliver_packet_iov in net/net.c in Qemu accepts packet sizes greater than INT_MAX, which allows attackers to cause a denial of service or possibly have unspecified other impact.. EPSS estimates a 4.78% chance of exploitation in the next 30 days.
Description
qemu_deliver_packet_iov in net/net.c in Qemu accepts packet sizes greater than INT_MAX, which allows attackers to cause a denial of service or possibly have unspecified other impact.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Qemu | Qemu | <= 3.0.0 | — |
| Qemu | Qemu | 3.1.0 | Rc0 |
| Debian | Debian Linux | 8.0 | — |
| Debian | Debian Linux | 9.0 | — |
| Canonical | Ubuntu Linux | 14.04 | — |
| Canonical | Ubuntu Linux | 16.04 | — |
| Canonical | Ubuntu Linux | 18.04 | — |
| Canonical | Ubuntu Linux | 18.10 | — |
| Redhat | Openstack | 10 | — |
| Redhat | Openstack | 13 | — |
| Redhat | Openstack | 14 | — |
| Redhat | Virtualization | 4.0 | — |
| Redhat | Virtualization Manager | 4.3 | — |
References
- http://www.openwall.com/lists/oss-security/2018/10/08/1Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2166Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2425Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2553Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00038.htmlMailing List, Third Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2018-09/msg03267.htmlMailing List, Patch, Third Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg06054.htmlMailing List, Patch, Third Party Advisory
- https://usn.ubuntu.com/3826-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4338Third Party Advisory
- http://www.openwall.com/lists/oss-security/2018/10/08/1Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2166Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2425Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2553Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00038.htmlMailing List, Third Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2018-09/msg03267.htmlMailing List, Patch, Third Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg06054.htmlMailing List, Patch, Third Party Advisory
- https://usn.ubuntu.com/3826-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4338Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2018-17963?
qemu_deliver_packet_iov in net/net.c in Qemu accepts packet sizes greater than INT_MAX, which allows attackers to cause a denial of service or possibly have unspecified other impact.
How severe is CVE-2018-17963?
CVE-2018-17963 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.78% probability of exploitation in the next 30 days.
How do I fix CVE-2018-17963?
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.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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