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CVE-2016-8618

25
FAUCET Score

CVE-2016-8618 describes a critical double-free vulnerability in the libcurl API function curl_maprintf() affecting versions prior to 7.51.0, specifically on systems utilizing 32-bit size_t variables. This flaw, rated 9.8 CRITICAL, allows an unauthenticated attacker to achieve high impact to confidentiality, integrity, and availability over the network with low attack complexity. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 7.51.0CPE matchmatch criteria
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.57%
Probability of exploitation in next 30 days
EPSS Percentile
90.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0457 is in the 84th percentile among its peer group of 36,835 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 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 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (25)

jitsipatch availablevia llm_extracted
Fixed in: 7.50.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: httpd24-curl-0:7.61.1-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: httpd24-httpd-0:2.4.34-7.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: httpd24-nghttp2-0:1.7.1-7.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: httpd24-curl-0:7.61.1-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: httpd24-httpd-0:2.4.34-7.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: httpd24-nghttp2-0:1.7.1-7.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: httpd24-curl-0:7.61.1-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: httpd24-httpd-0:2.4.34-7.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: httpd24-nghttp2-0:1.7.1-7.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: httpd24-curl-0:7.61.1-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: httpd24-httpd-0:2.4.34-7.el7
View patch
redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: httpd24-curl-0:7.61.1-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: httpd24-httpd-0:2.4.34-7.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: httpd24-nghttp2-0:1.7.1-7.el7
View patch
redhatpatch availablevia redhat_api
Product: Text-Only JBCSFixed in: jbcs-httpd24-curl
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: httpd24-nghttp2-0:1.7.1-7.el7
View patch
sierra_wirelesspatch availablevia llm_extracted
Fixed in: 7.50.3
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat JBoss Enterprise Web Server 3Fixed in: curl
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: curl
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: curl
redhatend of lifevia redhat_api
Product: .NET Core 2.1 on Red Hat Enterprise LinuxFixed in: rh-dotnet21-curl
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Virtualization 3Fixed in: mingw-virt-viewer
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: curl

Vendor Advisories (3)

redhatCVE-2016-8618Moderate

curl: Double-free in curl_maprintf

Nov 2, 2016
sierra_wirelessllm-sierra_wireless-2bb2144dd8c83ac9MEDIUM

double free in curl_maprintf

Nov 2, 2016
jitsillm-jitsi-d052fb20d63e49d4MEDIUM

double free in curl_maprintf

Nov 2, 2016

References

access.redhat.com / errata/RHSA-2018:2486
Third Party Advisory
access.redhat.com / errata/RHSA-2018:3558
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
curl.haxx.se / docs/adv_20161102D.html
PatchVendor Advisory
security.gentoo.org / glsa/201701-47
Third Party Advisory
tenable.com / security/tns-2016-21
Third Party Advisory
oracle.com / technetwork/security-advisory/cpuoct2018-4428296.html
securityfocus.com / bid/94098
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037192
Third Party AdvisoryVDB Entry