Use After Free in Php

CVE-2016-9936

The unserialize implementation in ext/standard/var.c in PHP 7.x before 7.0.14 allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted serialized data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-6834.

Vulnerability class: Use-After-Free

EPSS: 0.042 (89.8th percentile) — read the EPSS interpretation.

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.

Affected products

  • Php — versions 7.0.0, 7.0.1, 7.0.2
  • N/a — versions n/a

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2016-9936?
CVE-2016-9936 is a critical-severity vulnerability in Php, classified under Use After Free. CVSS score: 9.8/10. Published 2017-01-04.
How severe is CVE-2016-9936?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2016-9936 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.