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.
CVE-2016-4483
HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence
Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 7.5; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 6.2%CVSS: 7.5Exploit: None knownExposed services: —
A fix is available — apply it.
Internet exposure
The internet-exposure footprint is temporarily unavailable — the KEV-Exposure radar's record for this CVE could not be loaded just now. That is not a finding of zero exposed services; please retry shortly.
- CVSS v3
- 7.5
- EG Score
- 7.5HIGHmedium confidence
- EG Risk
- 41EG Risk 41/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity75% × 45%Exploitation6% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 6.2%
- EPSS %ILE
- 93rd
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
April 11, 2017
Last Modified
June 17, 2026
References (28)
- cve@mitrehttp://rhn.redhat.com/errata/RHSA-2016-2957.html
- cve@mitrehttp://www.debian.org/security/2016/dsa-3593
- cve@mitrehttp://www.openwall.com/lists/oss-security/2016/05/03/8
- cve@mitrehttp://www.openwall.com/lists/oss-security/2016/05/04/7
- cve@mitrehttp://www.openwall.com/lists/oss-security/2016/06/07/4
- cve@mitrehttp://www.openwall.com/lists/oss-security/2016/06/07/5
- cve@mitrehttp://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
- cve@mitrehttp://www.securityfocus.com/bid/90013
- cve@mitrehttp://www.securitytracker.com/id/1036348
- cve@mitrehttps://git.gnome.org/browse/libxml2/commit/?id=c97750d11bb8b6f3303e7131fe526a61ac65bcfd
- cve@mitrehttps://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- cve@mitrehttps://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- cve@mitrehttps://security.gentoo.org/glsa/201701-37
- cve@mitrehttps://www.tenable.com/security/tns-2016-18
- af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-2957.html
Patch Availability(6)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| Debian:11 | libxml2 @ 2.9.3+dfsg1-1.1 (the fix for one version range) | — | 0 |
| Debian:12 | libxml2 @ 2.9.3+dfsg1-1.1 (the fix for one version range) | — | 0 |
| Debian:13 | libxml2 @ 2.9.3+dfsg1-1.1 (the fix for one version range) | — | 0 |
| Debian:14 | libxml2 @ 2.9.3+dfsg1-1.1 (the fix for one version range) | — | 0 |
| Debian:7 | libxml2 @ 2.8.0+dfsg1-7+wheezy6 (fixes 2.8.0+dfsg1-7+nmu1 ... 2.8.0+dfsg1-7+wheezy5 (8 versions)) | — | 0 |
| Debian:8 | libxml2 @ 2.9.1+dfsg1-5+deb8u2 (fixes 2.9.1+dfsg1-5, 2.9.1+dfsg1-5+deb8u1) | — | 0 |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownDebian:8:libxml2
Same vendor
10 shownredhat:RHSA-2016:2957
Same CWE
10 shownCWE-502
- CVE-2016-0779EG 9.8EPSS p95CRITICAL
- CVE-2017-5983EG 9.8EPSS p97CRITICAL
- CVE-2016-10304EG 6.5MEDIUM
- CVE-2016-6809EG 9.8EPSS p95CRITICAL
- CVE-2017-5645EG 9.8EPSS p100CRITICAL
- CVE-2016-8749EG 9.8EPSS p96CRITICAL
- CVE-2017-7293EG 7.8HIGH
- CVE-2017-3066EG 9.8 KEVEPSS p100CRITICAL
- CVE-2014-8731EG 9.8EPSS p96CRITICAL
- CVE-2017-5929EG 9.8EPSS p94CRITICAL
Frequently asked(5)
What is CVE-2016-4483?
CVE-2016-4483 is a high vulnerability published on April 11, 2017. 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.
When was CVE-2016-4483 disclosed?
CVE-2016-4483 was first published on April 11, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-4483 actively exploited?
CVE-2016-4483 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.2% probability of exploitation in the next 30 days (93rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2016-4483?
CVE-2016-4483 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2016-4483?
A fix for CVE-2016-4483 is available: update to the fixed version the vendor names in its advisory.
Dependency Blast Radius
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