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Fencer Intel
high 7.5

CVE-2014-8142 in the critical feed json

Use-after-free vulnerability in the process_nested_data function in ext/standard/var_unserializer.re in PHP before 5.4.36, 5.5.x before 5.5…

published 2014-12-20 11 y ago modified 2026-06-17 4 mo ago also EUVD-2014-7985

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
55.1%
EPSS 55.1% chance of exploitation in 30 days, percentile 99%
public exploits
0
none known

Summary

Use-after-free vulnerability in the process_nested_data function in ext/standard/var_unserializer.re in PHP before 5.4.36, 5.5.x before 5.5.20, and 5.6.x before 5.6.4 allows remote attackers to execute arbitrary code via a crafted unserialize call that leverages improper handling of duplicate keys within the serialized properties of an object, a different vulnerability than CVE-2004-1019.

Patch / fix

  • php5 Ubuntu 14.04 LTS 5.5.9+dfsg-1ubuntu4.6

ubuntu advisories UBUNTU-CVE-2014-8142

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • php54 RHEL 2 SOFTWARE_COLLECTIONS 2.0-1.el6
  • php54 RHEL 2 SOFTWARE_COLLECTIONS 2.0-1.el7
  • php54-php RHEL 2 SOFTWARE_COLLECTIONS 5.4.40-1.el6
  • php54-php RHEL 2 SOFTWARE_COLLECTIONS 5.4.40-1.el7
  • php54-php-gd RHEL 2 SOFTWARE_COLLECTIONS 5.4.40-1.el6
  • php54-php-gd RHEL 2 SOFTWARE_COLLECTIONS 5.4.40-1.el7
  • php54-php-cli RHEL 2 SOFTWARE_COLLECTIONS 5.4.40-1.el6
  • php54-php-cli RHEL 2 SOFTWARE_COLLECTIONS 5.4.40-1.el7

red hat advisories RHSA-2015:1066RHSA-2015:1135RHSA-2015:1053

  • php5 SLE Software Development Kit 12, SLE Module for Web and Scripting 12 5.5.14-11.3
  • php53 SLES 11 SP2-LTSS 5.3.17-47.1

suse advisories SUSE-SU-2016:1638-1SUSE-SU-2015:0365-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2014-8142 updated cvss 5.1

php: use after free vulnerability in unserialize()

  • Red Hat Software Collections php54-php, php55-php, php54-php-gd, php55-php-gd, php54-php-cli, php54-php-dba, +44 more
    affected: no fix available
  • Red Hat Enterprise Linux Client Optional (v. 7) php 5.4.16-36.el7_1, php-gd 5.4.16-36.el7_1, php-cli 5.4.16-36.el7_1, php-dba 5.4.16-36.el7_1, php-fpm 5.4.16-36.el7_1, php-pdo 5.4.16-36.el7_1, +18 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) php 5.4.16-36.el7_1, php-gd 5.4.16-36.el7_1, php-cli 5.4.16-36.el7_1, php-dba 5.4.16-36.el7_1, php-fpm 5.4.16-36.el7_1, php-pdo 5.4.16-36.el7_1, +18 more Red Hat Enterprise Linux Server (v. 7) php 5.4.16-36.el7_1, php 5.4.16-36.ael7b_1, php-gd 5.4.16-36.el7_1, php-cli 5.4.16-36.el7_1, php-pdo 5.4.16-36.el7_1, php-xml 5.4.16-36.el7_1, +22 more Red Hat Enterprise Linux Server Optional (v. 7) php-dba 5.4.16-36.el7_1, php-fpm 5.4.16-36.el7_1, php-intl 5.4.16-36.el7_1, php-snmp 5.4.16-36.el7_1, php-dba 5.4.16-36.ael7b_1, php-fpm 5.4.16-36.ael7b_1, +14 more Red Hat Enterprise Linux Workstation (v. 7) php 5.4.16-36.el7_1, php-gd 5.4.16-36.el7_1, php-cli 5.4.16-36.el7_1, php-pdo 5.4.16-36.el7_1, php-xml 5.4.16-36.el7_1, php-ldap 5.4.16-36.el7_1, +8 more Red Hat Enterprise Linux Workstation Optional (v. 7) php-dba 5.4.16-36.el7_1, php-fpm 5.4.16-36.el7_1, php-intl 5.4.16-36.el7_1, php-snmp 5.4.16-36.el7_1, php-bcmath 5.4.16-36.el7_1, php-pspell 5.4.16-36.el7_1, +4 more
    fixed: vendor fix RHSA-2015:1135
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) php54 2.0-1.el6, php55 2.0-1.el6, php54-php 5.4.40-1.el6, php55-php 5.5.21-2.el6, php54-runtime 2.0-1.el6, php55-runtime 2.0-1.el6, +51 more Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) php54 2.0-1.el7, php55 2.0-1.el7, php54-php 5.4.40-1.el7, php55-php 5.5.21-2.el7, php54-runtime 2.0-1.el7, php55-runtime 2.0-1.el7, +47 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.5) php54 2.0-1.el6, php55 2.0-1.el6, php54-php 5.4.40-1.el6, php55-php 5.5.21-2.el6, php54-runtime 2.0-1.el6, php55-runtime 2.0-1.el6, +51 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6) php54 2.0-1.el6, php55 2.0-1.el6, php54-php 5.4.40-1.el6, php55-php 5.5.21-2.el6, php54-runtime 2.0-1.el6, php55-runtime 2.0-1.el6, +51 more Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) php54 2.0-1.el6, php55 2.0-1.el6, php54-php 5.4.40-1.el6, php55-php 5.5.21-2.el6, php54-runtime 2.0-1.el6, php55-runtime 2.0-1.el6, +51 more Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) php54 2.0-1.el7, php55 2.0-1.el7, php54-php 5.4.40-1.el7, php55-php 5.5.21-2.el7, php54-runtime 2.0-1.el7, php55-runtime 2.0-1.el7, +47 more
    fixed: vendor fix RHSA-2015:1066
  • Red Hat Enterprise Linux 5 php, php53 Red Hat Enterprise Linux 6 php, php-gd, php-cli, php-dba, php-fpm, php-pdo, +20 more Red Hat Software Collections rh-php56-php, rh-php56-php-gd, rh-php56-php-cli, rh-php56-php-dba, rh-php56-php-dbg, rh-php56-php-fpm, +22 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

55.06% chance of exploitation in the next 30 days, higher than 99% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugs.php.net https://bugs.php.net/bug.php?id=68594 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.