What is CVE-2016-3141?

CVE-2016-3141 is a critical-severity vulnerability in Apple Mac OS X, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2016-03-31.

How severe is CVE-2016-3141?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2016-3141 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Apple Mac OS X

CVE-2016-3141

Use-after-free vulnerability in wddx.c in the WDDX extension in PHP before 5.5.33 and 5.6.x before 5.6.19 allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly have unspecified other impact by triggering a wddx_deserialize call on XML data containing a crafted var element.

Vulnerability class: Buffer Overflow

Published 2016-03-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.360 (98.4th percentile), scored 2026-09-28.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.360 · newest: 0.360 · change: 0.000

Affected products

Apple Mac OS X
PHP — versions 5.6.0, 5.6.1, 5.6.2

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

References

git.php.net/
www.ubuntu.com/usn/USN-2952-1 (vendor-advisory)
www.securityfocus.com/bid/84271 (vdb-entry)
support.apple.com/HT206567
lists.opensuse.org/opensuse-security-announce/2016-04/msg00058.html (vendor-advisory)
rhn.redhat.com/errata/RHSA-2016-2750.html (vendor-advisory)
lists.opensuse.org/opensuse-security-announce/2016-04/msg00056.html (vendor-advisory)
www.ubuntu.com/usn/USN-2952-2 (vendor-advisory)
lists.apple.com/archives/security-announce/2016/May/msg00004.html (vendor-advisory)
www.securitytracker.com/id/1035255 (vdb-entry)

Frequently asked questions

What is CVE-2016-3141?: CVE-2016-3141 is a critical-severity vulnerability in Apple Mac OS X, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2016-03-31.
How severe is CVE-2016-3141?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2016-3141 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.