CVE-2018-17963

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-10-09 · updated 2026-06-17
Weakness: CWE-190

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.

Affected products

Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 18.10
Debian Linux: 8.0, 9.0
QEMU: through 3.0.0; 3.1.0-rc0, 3.1.0-rc1, 3.1.0-rc2, 3.1.0-rc3
OpenStack: 10, 13, 14
RedHat Virtualization: 4.0
RedHat Virtualization Manager: 4.3

References

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

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