MEDIUM
libxml2: Heap-based buffer overread in htmlCurrentChar
Published May 20, 2016
5.5
MEDIUMCVSS 3.0
EPSS 2.56%
Description
The htmlCurrentChar function in libxml2 before 2.9.4, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1, allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted XML document.
Affected products
No data.
Configuration 1
Configuration 2
- 8.0
Configuration 3
OR
- 12.04
- 14.04
- 15.10
- 16.04
Configuration 4
OR
- 6.0
- 7.0
- 6.0
- 7.0
- 7.2
- 7.3
- 7.4
- 7.6
- 7.2
- 7.3
- 7.4
- 7.5
- 7.6
- 7.2
- 7.3
- 7.6
- 6.0
- 7.0
Configuration 6
OR
- ≥ 7.5.0.0 · ≤ 7.5.2.10
- > 7.6.0.0 · ≤ 7.6.2.3
No data.
Red Hat Enterprise Linux 6
libxml2-0:2.7.6-21.el6_8.1
Fixed · RHSA-2016:1292
Red Hat Enterprise Linux 7
libxml2-0:2.9.1-6.el7_2.3
Fixed · RHSA-2016:1292
Red Hat JBoss Core Services
n/a
Fixed · RHSA-2016:2957
Red Hat Enterprise Linux 5
libxml2
Will not fix
Red Hat JBoss Enterprise Web Server 3
libxml2
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | libxml2-0:2.7.6-21.el6_8.1 | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux 7 | libxml2-0:2.9.1-6.el7_2.3 | Fixed | RHSA-2016:1292 |
| Red Hat JBoss Core Services | n/a | Fixed | RHSA-2016:2957 |
| Red Hat Enterprise Linux 5 | libxml2 | Will not fix | n/a |
| Red Hat JBoss Enterprise Web Server 3 | libxml2 | Affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
5.5 MEDIUM NVD
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
4.3 MEDIUM NVD
AV:N/AC:M/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
2.56% 0.02559
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.02559
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (22 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.56% (0.02559) | 84.53th | v5 (v2026.06.15) |
| Sep 22, 2026 | 2.56% (0.02559) | 84.40th | v5 (v2026.06.15) |
| Sep 21, 2026 | 4.83% (0.04826) | 91.60th | v5 (v2026.06.15) |
| Sep 6, 2026 | 2.56% (0.02559) | 84.05th | v5 (v2026.06.15) |
| Sep 5, 2026 | 4.83% (0.04826) | 91.42th | v5 (v2026.06.15) |
| Aug 30, 2026 | 2.56% (0.02559) | 83.96th | v5 (v2026.06.15) |
| Aug 28, 2026 | 4.83% (0.04826) | 91.37th | v5 (v2026.06.15) |
| Aug 24, 2026 | 2.56% (0.02559) | 83.88th | v5 (v2026.06.15) |
| Aug 23, 2026 | 4.83% (0.04826) | 91.33th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.57% (0.02569) | 83.06th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.21% (0.01214) | 77.16th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.14% (0.03135) | 78.00th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.21% (0.01214) | 77.64th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.50% (0.00498) | 77.08th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.50% (0.00498) | 75.59th | v3 (v2023.03.01) |
| Aug 21, 2023 | 0.50% (0.00498) | 73.25th | v3 (v2023.03.01) |
| Jun 2, 2023 | 0.41% (0.00410) | 70.14th | v3 (v2023.03.01) |
| Mar 11, 2023 | 0.35% (0.00348) | 67.23th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.21% (0.00215) | 57.65th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.93% (0.03932) | 85.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.93% (0.03932) | 84.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.93% (0.03932) | 67.70th | v2 (v2022.01.01) |
Weaknesses (2)
References (27)
- http://lists.apple.com/archives/security-announce/2016/May/msg00001.html vendor-advisoryx_refsource_APPLEMailing ListVendor Advisory
- http://lists.apple.com/archives/security-announce/2016/May/msg00002.html vendor-advisoryx_refsource_APPLEMailing ListVendor Advisory
- http://lists.apple.com/archives/security-announce/2016/May/msg00003.html vendor-advisoryx_refsource_APPLEMailing ListVendor Advisory
- http://lists.apple.com/archives/security-announce/2016/May/msg00004.html vendor-advisoryx_refsource_APPLEMailing ListVendor Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2957.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html x_refsource_CONFIRMThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html x_refsource_CONFIRMPatchThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/90691 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1035890 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-2994-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://xmlsoft.org/news.html x_refsource_CONFIRMRelease NotesVendor Advisory
- https://access.redhat.com/errata/RHSA-2016:1292 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2016-1833 Vendor Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=636 x_refsource_MISCExploitMailing ListThird Party Advisory
- https://bugzilla.gnome.org/show_bug.cgi?id=758606 x_refsource_CONFIRMExploitIssue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1338682 Issue Tracking
- https://git.gnome.org/browse/libxml2/commit/?id=0bcd05c5cd83dec3406c8f68b769b1d610c72f76 x_refsource_CONFIRMPatchThird Party Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10170 x_refsource_CONFIRMPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-1833
- https://support.apple.com/HT206564 x_refsource_CONFIRMVendor Advisory
- https://support.apple.com/HT206566 x_refsource_CONFIRMVendor Advisory
- https://support.apple.com/HT206567 x_refsource_CONFIRMVendor Advisory
- https://support.apple.com/HT206568 x_refsource_CONFIRMVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-1833
- https://www.debian.org/security/2016/dsa-3593 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.tenable.com/security/tns-2016-18 x_refsource_CONFIRMThird Party Advisory
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner apple
Published May 20, 2016
Updated Aug 5, 2024
Reserved Jan 13, 2016
Link CVE-2016-1833
CISA Vulnrichment
Updated n/a