CVE-2016-4483

Exp

The xmlBufAttrSerializeTxtContent function in xmlsave.c in libxml2 allows context-dependent attackers to cause a denial of service (out-of-bounds read and application crash) via a non-UTF-8 attribute value, related to serialization. NOTE: this vulnerability may be a duplicate of CVE-2016-3627.

Published: 2017-04-11 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-4483 is rated High Exploit Risk (82.3/100): CVSS High severity, with high exploitation likelihood (EPSS 6.17%, 93th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +4.90% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2016-4483

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2016-4483

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 1.27% 6.17% +4.90%
2 2026-02-10 0.94% 1.27% +0.33%
3 2025-12-03 — 0.94% —

Full EPSS history (15 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-4483

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/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:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2016-4483

OS Trackers for CVE-2016-4483

vendor priority summary link
debian not yet assigned CVE-2016-4483 not yet assigned priority: Debian including 1 source packages (libxml2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2016-4483
gentoo normal CVE-2016-4483: 1 GLSA(s) (201701-37), 1 atom(s) (dev-libs/libxml2); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-4483
redhat medium — https://access.redhat.com/security/cve/CVE-2016-4483
suse low CVE-2016-4483 severity low: SUSE including 128 source package names (libxml2, libxml2-2, …), 287 product×package rows across 70 product lines (HPE Helion OpenStack 8, SUSE Linux Enterprise Desktop 12, … (70 product lines)): Fixed 214, Known Not Affected 73. https://www.suse.com/security/cve/CVE-2016-4483/
ubuntu low CVE-2016-4483 low priority: Ubuntu including 1 source packages (libxml2), 7 status rows across 7 suites (precise, trusty, upstream, wily, xenial, yakkety, zesty): released 5, not-affected 2. https://ubuntu.com/security/CVE-2016-4483

Affected software / configurations for CVE-2016-4483

Vendor Product Version Raw CPE
xmlsoft libxml2 < 2.9.4 cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
oracle solaris 11.3 cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:*

References for CVE-2016-4483

URL Tags
http://rhn.redhat.com/errata/RHSA-2016-2957.html Third Party Advisory
http://www.debian.org/security/2016/dsa-3593 Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/05/03/8 Exploit Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/05/04/7 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/07/4 Mailing List Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/07/5 Mailing List Patch Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html Third Party Advisory
http://www.securityfocus.com/bid/90013 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1036348 Third Party Advisory VDB Entry
https://git.gnome.org/browse/libxml2/commit/?id=c97750d11bb8b6f3303e7131fe526a61ac65bcfd Patch Third Party Advisory
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
https://security.gentoo.org/glsa/201701-37 Third Party Advisory
https://www.tenable.com/security/tns-2016-18 Third Party Advisory
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