CVE-2016-7444

The gnutls_ocsp_resp_check_crt function in lib/x509/ocsp.c in GnuTLS before 3.4.15 and 3.5.x before 3.5.4 does not verify the serial length of an OCSP response, which might allow remote attackers to bypass an intended certificate validation mechanism via vectors involving trailing bytes left by gnutls_malloc.

Published: 2016-09-27 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-7444 is rated Moderate Risk (59.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.44%). EPSS rose +1.04% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-7444

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.39% 2.44% +1.04%
2 2026-05-31 1.02% 1.39% +0.37%
3 2025-10-29 — 1.02% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-7444

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2016-7444

OS Trackers for CVE-2016-7444

vendor priority summary link
debian not yet assigned CVE-2016-7444 not yet assigned priority: Debian including 1 source packages (gnutls28), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2016-7444
redhat low — https://access.redhat.com/security/cve/CVE-2016-7444
suse low CVE-2016-7444 severity low: SUSE including 29 source package names (gnutls-3.2.15-16.1, gnutls-3.3.26-9.el7, …), 76 product×package rows across 20 product lines (SUSE Liberty Linux 7, SUSE Linux Enterprise Desktop 12 SP1, … (20 product lines)): Fixed 76. https://www.suse.com/security/cve/CVE-2016-7444/
ubuntu low CVE-2016-7444 low priority: Ubuntu including 2 source packages (gnutls26, gnutls28), 20 status rows across 10 suites (artful, bionic, cosmic, disco, precise, trusty, upstream, xenial, yakkety, zesty): not-affected 10, DNE 8, released 2. https://ubuntu.com/security/CVE-2016-7444

Affected software / configurations for CVE-2016-7444

Vendor Product Version Raw CPE
gnu gnutls <= 3.4.14 cpe:2.3:a:gnu:gnutls:*:*:*:*:*:*:*:*
gnu gnutls 3.5.0 cpe:2.3:a:gnu:gnutls:3.5.0:*:*:*:*:*:*:*
gnu gnutls 3.5.1 cpe:2.3:a:gnu:gnutls:3.5.1:*:*:*:*:*:*:*
gnu gnutls 3.5.2 cpe:2.3:a:gnu:gnutls:3.5.2:*:*:*:*:*:*:*
gnu gnutls 3.5.3 cpe:2.3:a:gnu:gnutls:3.5.3:*:*:*:*:*:*:*

References for CVE-2016-7444

cvelogic Threat Intelligence