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CVE-2018-12371

28
FAUCET Score

CVE-2018-12371 is an integer overflow vulnerability in the Skia library, affecting Firefox ESR, Thunderbird, and Firefox versions prior to 61. This flaw, occurring during memory allocation for edge builders on systems with 16GB+ RAM, can lead to uninitialized memory use and a potentially exploitable crash. Rated 8.8 HIGH, it is a network-exploitable vulnerability with low attack complexity, posing high impacts to confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 60.1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 61.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 60.0CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.45%
Probability of exploitation in next 30 days
EPSS Percentile
70.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0145 is in the 69th percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

mozillapatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2018-12371Moderate

Mozilla: Integer overflow in Skia library during edge builder allocation

Jun 26, 2018

References

bugzilla.mozilla.org / show_bug.cgi
ExploitIssue TrackingPatchVendor Advisory
mozilla.org / security/advisories/mfsa2018-15
Vendor Advisory
mozilla.org / security/advisories/mfsa2018-16
Vendor Advisory
mozilla.org / security/advisories/mfsa2018-19
Vendor Advisory