Buffer overflow in network stack for EDK II may allow unprivileged user to potentially enable escalation of privilege and/or denial of serv…

published 2019-03-27 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-4156

cvss: 9.1; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.3%; EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits: 0; none known

Buffer overflow in network stack for EDK II may allow unprivileged user to potentially enable escalation of privilege and/or denial of service via network.

Patch / fix

distros 4 links 1

debian ubuntu suse opensuse

edk2 Debian 14, Debian 13, Debian 12 0~20181115.85588389-3

debian advisories DEBIAN-CVE-2018-12178

edk2 Ubuntu 16.04 LTS 0~20160408.ffea0a2c-2ubuntu0.1
edk2 Ubuntu 18.04 LTS 0~20180205.c0d9813c-2ubuntu0.2

ubuntu advisories UBUNTU-CVE-2018-12178

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

ovmf SLES for SAP 12 SP4, SLES 12 SP4, SLED 12 SP4 2017+git1510945757.b2662641d5-3.8.3
ovmf SLE Module for Server Applications 15 2017+git1510945757.b2662641d5-5.14.1
ovmf SLES for SAP 12 SP3, SLES 12 SP3 2017+git1492060560.b6d11d7c46-4.20.1

suse advisories SUSE-SU-2019:0581-1 SUSE-SU-2019:0580-1 SUSE-SU-2019:0579-1

ovmf openSUSE Tumbleweed 202105-3.4
ovmf openSUSE Leap 15.0 2017+git1510945757.b2662641d5-lp150.4.13.1

opensuse advisories openSUSE-SU-2024:11134-1 openSUSE-SU-2019:1083-1

edk2-docs.gitbooks.io/security-advisory/content/dns-pack-size-check.html advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-12178 updated 2026-11-04 cvss 7.2

edk2: improper DNS packet size check

Red Hat Enterprise Linux 7 OVMF Red Hat Enterprise Linux 8 edk2, edk2-ovmf, edk2-aarch64 Red Hat Virtualization 4 redhat-virtualization-host-image-update
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.27% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.0	9.1	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
NVD	2.0	6.4	AV:N/AC:L/Au:N/C:N/I:P/A:P

Affected products

Extensible Firmware Interface Development Kit (EDK II) Extensible Firmware Interface Development Kit (EDK II)

Classification

Weakness

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

edk2-docs.gitbooks.io /security-advisory/content/dns-pack-size-check.html
patch, third-party-advisory
lists.opensuse.org /opensuse-security-announce/2019-03/msg00046.html
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/4ABTDKZK2G5XP6JCO3HXMPOA2NRTIYDZ/
vendor-advisory
usn.ubuntu.com /4349-1/
vendor-advisory
support.hpe.com /hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03912en_us

Sources

CVE List CVE-2018-12178
NVD CVE-2018-12178

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary