CVE-2016-1544

nghttp2 before 1.7.1 allows remote attackers to cause a denial of service (memory exhaustion).

Published: 2020-02-06 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-1544 is rated Low Risk (32.1/100): CVSS Low severity, with medium exploitation likelihood (EPSS 0.89%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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-2016-1544

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 1.04% 0.89% -0.15%
2 2026-04-23 1.59% 1.04% -0.55%
3 2026-03-04 — 1.59% —

Full EPSS history (45 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-1544

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.3 3.1 LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
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:L)
A normal user session is enough; they don’t have to be admin.
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:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 1.8 1.4 [email protected]
2.1 2.0 LOW
AV:L/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
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:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 2.9 [email protected]

Weakness enumeration for CVE-2016-1544

OS Trackers for CVE-2016-1544

vendor priority summary link
debian not yet assigned CVE-2016-1544 not yet assigned priority: Debian including 1 source packages (nghttp2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2016-1544
gentoo normal CVE-2016-1544: 1 GLSA(s) (201612-13), 1 atom(s) (net-libs/nghttp2); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-1544
redhat low — https://access.redhat.com/security/cve/CVE-2016-1544
suse low CVE-2016-1544 severity low: SUSE including 290 source package names (26.268:libnghttp2-14-1.39.2-3.5.1, 6.5.151:libnghttp2-14-1.39.2-3.5.1, …), 411 product×package rows across 77 product lines (Container suse/ltss/sle12.5/sles12sp5, Container suse/sles12sp4, … (77 product lines)): Fixed 204, Known Affected 157, Known Not Affected 50. https://www.suse.com/security/cve/CVE-2016-1544/
ubuntu medium CVE-2016-1544 medium priority: Ubuntu including 1 source packages (nghttp2), 5 status rows across 5 suites (precise, trusty, upstream, wily, xenial): DNE 2, ignored 1, not-affected 1, released 1. https://ubuntu.com/security/CVE-2016-1544

Affected software / configurations for CVE-2016-1544

Vendor Product Version Raw CPE
nghttp2 nghttp2 < 1.7.1 cpe:2.3:a:nghttp2:nghttp2:*:*:*:*:*:*:*:*
fedoraproject fedora 22 cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
fedoraproject fedora 23 cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*

References for CVE-2016-1544

cvelogic Threat Intelligence