CVE-2016-7947

Multiple integer overflows in X.org libXrandr before 1.5.1 allow remote X servers to trigger out-of-bounds write operations via a crafted response.

Published: 2016-12-13 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-7947 is rated High Risk (70/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 3.63%). High exploitation likelihood—assess exposure and prioritize 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-2016-7947

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 2026-06-20 3.66% 3.63% -0.03%
2 2026-06-17 3.56% 3.66% +0.10%
3 2026-06-15 — 3.56% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-7947

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P 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:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2016-7947

OS Trackers for CVE-2016-7947

vendor priority summary link
debian low CVE-2016-7947 low priority: Debian including 1 source packages (libxrandr), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2016-7947
gentoo high CVE-2016-7947: 1 GLSA(s) (201704-03), 8 atom(s) (x11-base/xorg-server, x11-libs/libICE, …); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-7947
redhat medium — https://access.redhat.com/security/cve/CVE-2016-7947
suse medium — https://www.suse.com/security/cve/CVE-2016-7947/
ubuntu low CVE-2016-7947 low priority: Ubuntu including 5 source packages (libxrandr, libxrandr-lts-quantal, libxrandr-lts-raring, libxrandr-lts-saucy, libxrandr-lts-trusty), 80 status rows across 16 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, precise, trusty, upstream, xenial, yakkety, zesty): DNE 57, released 11, ignored 8, needs-triage 4. https://ubuntu.com/security/CVE-2016-7947

Affected software / configurations for CVE-2016-7947

Vendor Product Version Raw CPE
fedoraproject fedora 24 cpe:2.3:o:fedoraproject:fedora:24:*:*:*:*:*:*:*
fedoraproject fedora 25 cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:*
x.org libxrandr <= 1.5.0 cpe:2.3:a:x.org:libxrandr:*:*:*:*:*:*:*:*

References for CVE-2016-7947

cvelogic Threat Intelligence