CVE-2018-12440

FAUCET Score

CVE-2018-12440 describes a memory-cache side-channel vulnerability in BoringSSL, affecting versions through June 14, 2018, which could allow an attacker to discover DSA keys. This medium-severity vulnerability (CVSS 4.7) requires local or same-physical-host access to the target machine, with high attack complexity, to achieve high confidentiality impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		<= 2018-06-14CPE matchmatch criteria	cpe:2.3:a:google:boringssl::::::::

CVSS Data

CVSS version used by this source: 3.0

4.7MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

Exploitability Score

1.0

Impact Score

3.6

CvssVersion

3.0

Exploit Intelligence

EPSS Score

0.14%

Probability of exploitation in next 30 days

EPSS Percentile

3.7%

Percentile rank of EPSS score among Peer Group

As of 2026-07-25

Model: v2026.06.15

This CVE's current EPSS score of 0.0014 is in the 28th percentile among its peer group of 1,296 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.4 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

redhatend of lifevia redhat_api

Product: Red Hat Fuse 7Fixed in: camel

Vendor Advisories (1)

redhatCVE-2018-12440Moderate

netty-tcnative-boringssl-static: memory-cache side-channel attack on DSA signatures

Jun 13, 2018

References

nccgroup.trust / us/our-research/technical-advisory-return-of-the-hidden-number-problem

Third Party Advisory