libxml2: Heap-buffer-overflow in xmlStrncat
Published May 20, 2016
7.8
HIGHCVSS 3.1
EPSS 4.62%
Description
Heap-based buffer overflow in the xmlStrncat 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 execute arbitrary code or cause a denial of service (memory corruption) via a crafted XML document.
Affected products
No data.
Configuration 1
- 12.04
- 14.04
- 15.10
- 16.04
Configuration 2
Configuration 3
- 8.0
Configuration 4
- 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
- ≥ 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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Dec 4, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
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 (19 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.62% (0.04622) | 91.41th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.64% (0.04643) | 90.52th | v5 (v2026.06.15) |
| Dec 28, 2025 | 2.37% (0.02369) | 84.52th | v4 (v2025.03.14) |
| Dec 27, 2025 | 3.92% (0.03922) | 87.99th | v4 (v2025.03.14) |
| Oct 28, 2025 | 2.37% (0.02369) | 84.39th | v4 (v2025.03.14) |
| Oct 27, 2025 | 3.92% (0.03922) | 87.82th | v4 (v2025.03.14) |
| Oct 1, 2025 | 2.37% (0.02369) | 84.44th | v4 (v2025.03.14) |
| Aug 30, 2025 | 3.92% (0.03922) | 87.85th | v4 (v2025.03.14) |
| Aug 22, 2025 | 2.82% (0.02822) | 85.59th | v4 (v2025.03.14) |
| May 25, 2025 | 1.72% (0.01721) | 81.46th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.00% (0.03995) | 87.65th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.37% (0.00372) | 73.52th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.37% (0.00372) | 71.89th | v3 (v2023.03.01) |
| Jan 6, 2024 | 0.37% (0.00372) | 69.78th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.34% (0.00342) | 66.94th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.02% (0.04017) | 85.97th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.02% (0.04017) | 84.55th | v2 (v2022.01.01) |
| Mar 31, 2022 | 4.02% (0.04017) | 68.73th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.56% (0.03561) | 66.50th | v2 (v2022.01.01) |
References (25)
- 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/linuxbulletinjul2016-3090544.html x_refsource_CONFIRMThird 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-2016-1834 Vendor Advisory
- https://bugzilla.gnome.org/show_bug.cgi?id=763071 x_refsource_CONFIRMExploitIssue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1338708 Issue Tracking
- https://git.gnome.org/browse/libxml2/commit/?id=8fbbf5513d609c1770b391b99e33314cd0742704 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-2016-1834
- 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-2016-1834
- 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.