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Vulnerability record · CVE-2018-17963 · published 9 October 2018

CVE-2018-17963: Qemu integer overflow vulnerability

Qemu · Qemu

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.

9.8 CVSS 3.1 Critical EPSS 4.7% · top 8.6% CWE-190 · Integer overflow
9.8CVSS 3.1 base score, v2 7.5
4.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
18References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2018/10/08/1 Mailing ListThird Party Advisory
https://access.redhat.com/errata/RHSA-2019:2166 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2425 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2553 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html Mailing ListThird Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2018-09/msg03267.html Mailing ListPatchThird Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg06054.html Mailing ListPatchThird Party Advisory
https://usn.ubuntu.com/3826-1/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4338 Third Party Advisory
http://www.openwall.com/lists/oss-security/2018/10/08/1 Mailing ListThird Party Advisory
https://access.redhat.com/errata/RHSA-2019:2166 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2425 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2553 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html Mailing ListThird Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2018-09/msg03267.html Mailing ListPatchThird Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg06054.html Mailing ListPatchThird Party Advisory
https://usn.ubuntu.com/3826-1/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4338 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-17963), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.