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CVE-2018-3846

29
FAUCET Score

CVE-2018-3846 is a stack-based buffer overflow vulnerability in NASA CFITSIO versions 3.42 and earlier, affecting products like fedoraproject cfitsio and fedoraproject fedora. This high-severity flaw (CVSS 8.8) allows an unauthenticated attacker to achieve remote code execution by tricking a user into parsing a specially crafted FIT image. While the vulnerability is critical, there is no evidence of active exploitation, nor are there publicly available exploit modules or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
3.42CPE matchmatch criteria
cpe:2.3:a:nasa:cfitsio:3.42:*:*:*:*:*:*:*
28CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

CVSS:3.0/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
3.0

Exploit Intelligence

EPSS Score
3.07%
Probability of exploitation in next 30 days
EPSS Percentile
86.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0307 is in the 85th percentile among its peer group of 14,848 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

Vendor Patches (2)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: cfitsio
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Enterprise 2Fixed in: cfitsio

Vendor Advisories (1)

redhatCVE-2018-3846Important

cfitsio: Unsafe use of sprintf() can allow a remote unauthenticated attacker to execute arbitrary code

Mar 10, 2018

References

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/K46I2MFPCEOGC5LLDXZSWPB3EBPON3KA
security.gentoo.org / glsa/202101-24
Third Party Advisory
talosintelligence.com / vulnerability_reports/TALOS-2018-0529
ExploitThird Party Advisory