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CVE-2018-16429

25
FAUCET Score

CVE-2018-16429 describes an out-of-bounds read vulnerability in GNOME GLib 2.56.1, specifically within the g_markup_parse_context_parse() function in gmarkup.c, affecting various Canonical and GNOME GLib products. This vulnerability carries a CVSS score of 7.5 (HIGH), indicating it can be exploited remotely with low attack complexity, requiring no user interaction or privileges, and leading to high availability impact. Despite its high severity, there is no evidence of active exploitation, nor are there publicly available exploit modules or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.56.1CPE matchmatch criteria
cpe:2.3:a:gnome:glib:2.56.1:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.53%
Probability of exploitation in next 30 days
EPSS Percentile
88.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0353 is in the 79th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (8)

redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: glib2
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: glib2
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: glib2
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird

Vendor Advisories (1)

redhatCVE-2018-16429Low

glib2: Out-of-bounds read in g_markup_parse_context_parse() in gmarkup.c

Sep 4, 2018

References

gitlab.gnome.org / GNOME/glib/commit/cec71705406f0b2790422f0c1aa0ff3b4b464b1b
PatchVendor Advisory
gitlab.gnome.org / GNOME/glib/issues/1361
ExploitVendor Advisory
lists.apache.org / thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
lists.apache.org / thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
lists.debian.org / debian-lts-announce/2019/07/msg00029.html
usn.ubuntu.com / 3767-1
Third Party Advisory
usn.ubuntu.com / 3767-2
Third Party Advisory