CVE-2016-1834: apple iphone_os
Vulnerability summary
CVE-2016-1834 is a high (CVSS 9.3) vulnerability in apple iphone_os. EPSS estimates a 4.62% chance of exploitation in the next 30 days, higher than 91.7% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 9 · Related 5Timeline
- 20-05-2016PublishedVulnerability first disclosed.
- 04-12-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
7 scores · 4 sources · 3 versions- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
4.62%
Chance of exploitation in the next 30 days
Percentile
92%
Versus all other CVEs
30-day change
No change 0.00 pp
From 4.62% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (bugzilla.gnome.org)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.
- CWE-122Heap-based Buffer OverflowThe product writes past the end of a buffer that was allocated on the heap.
Affected systems
Known conditions: local access, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat6 products
- enterprise_linux_desktop6.0 | 7.0
- enterprise_linux_server6.0 | 7.0
- enterprise_linux_server_aus7.2 | 7.3 | 7.4 | 7.6
- enterprise_linux_server_eus7.2 | 7.3 | 7.4 | 7.5 | 7.6
- enterprise_linux_server_tus7.2 | 7.3 | 7.6
Debian2 products
- libxml2< 2.9.3+dfsg1-1.1
- debian_linuxEOL8.0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 15.10 | 16.04
Mcafee1 product
- web_gateway≥ 7.5.0.0, ≤ 7.5.2.10 | ≥ 7.6.0.0, ≤ 7.6.2.3
Ubuntu1 product
- libxml2< 2.9.1+dfsg1-3ubuntu4.8 | < 2.9.3+dfsg1-1ubuntu0.1
Xmlsoft1 product
- libxml2< 2.9.4
7 vendors · 16 products
References
25 links- git.gnome.org/browse/libxml2/commit/?id=8fbbf5513d609c1770b391b99e33314cd0742704X Refsource CONFIRMPatchThird Party Advisory
- www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlX Refsource CONFIRMThird Party Advisory
- www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.htmlX Refsource CONFIRMThird Party Advisory
- bugzilla.gnome.org/show_bug.cgi?id=763071X Refsource CONFIRMExploitIssue TrackingThird Party Advisory
Show all 25 references
- lists.apple.com/archives/security-announce/2016/May/msg00004.htmlVendor AdvisoryX Refsource APPLEMailing ListREPORT
- lists.apple.com/archives/security-announce/2016/May/msg00003.htmlVendor AdvisoryX Refsource APPLEMailing ListREPORT
- lists.apple.com/archives/security-announce/2016/May/msg00002.htmlVendor AdvisoryX Refsource APPLEMailing ListREPORT
- lists.apple.com/archives/security-announce/2016/May/msg00001.htmlVendor AdvisoryX Refsource APPLEMailing ListREPORT