CVE-2016-1833

medium

Published 2016-05-20 · Modified 2026-05-06

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CVSS v3

5.5

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS v4 NEW

—

not yet in upstream

VIR risk

5.5

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.

Predictions

Exploit likelihood

55%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

OS	Version	Status	Fixed in
debian	bookworm	fixed	`2.9.3+dfsg1-1.1`
debian	bullseye	fixed	`2.9.3+dfsg1-1.1`
debian	forky	fixed	`2.9.3+dfsg1-1.1`
debian	sid	fixed	`2.9.3+dfsg1-1.1`
debian	trixie	fixed	`2.9.3+dfsg1-1.1`
ubuntu	12.04	affected
ubuntu	14.04	affected
ubuntu	15.10	affected
ubuntu	16.04	affected
debian	8.0	affected
macos		affected	`9.3.2`
rhel	6.0	affected
rhel	7.0	affected

Application impact

Vendor	Product	Versions	Fixed
xmlsoft	libxml2	`{"endExcluding":"2.9.4"}`	`2.9.4`
mcafee	web_gateway	`{"startIncluding":"7.5.0.0","endIncluding":"7.5.2.10"}`

References

CWEs

CWE-125

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.