CVE-2015-6834

highpriority · attend · 65EPSS 0.468 · 99 %ileexploit · functionalDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · functional

Likely / severe?

46.8% (99th) EPSS

CVSS 7.5 · high

Is it mine?

63 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-26

Multiple use-after-free vulnerabilities in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13 allow remote attackers to execute arbitrary code via vectors related to (1) the Serializable interface, (2) the SplObjectStorage class, and (3) the SplDoublyLinkedList class, which are mishandled during unserialization.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.09.8criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Psecondary · FSTEC (BDU) RU

v3.09.8criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-416US

exploits (2)

Public proof-of-concept and weaponised exploit code.

EDB-38120PHP 5.4/5.5/5.6 - SplDoublyLinkedList 'Unserialize()' Use-After-Freefunctional · exploit_db
EDB-38122PHP 5.4/5.5/5.6 - SplObjectStorage 'Unserialize()' Use-After-Freefunctional · exploit_db

affected products (63)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Dell NetWorker <19.11.0.5all versionscert_bundDE
Dell NetWorker <19.13all versionscert_bundDE
F5 BIG-IPall versionscert_bundDEcpe:/a:f5:big-ip:-
F5 Enterprise Managerall versionscert_bundDEcpe:/a:f5:enterprise_manager:-
Open Source PHP <5.4.45all versionscert_bundDE
Open Source PHP <5.5.29all versionscert_bundDE
Open Source PHP <5.6.13all versionscert_bundDE
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Xerox WorkCentreall versionscert_bundDEcpe:/h:xerox:workcentre:-
Dell Networker< 19.11.0.5cert_bundDE
Dell Networker< 19.13cert_bundDE
Open Source PHP< 5.4.45cert_bundDE
Open Source PHP< 5.5.29cert_bundDE
Open Source PHP< 5.6.13cert_bundDE
n/a n/a≤ n/aenisa_euvdEU
PHP Group PHP≤ 5.4.45fstec_bduRU
PHP Group PHP5.5.0 → 5.5.29fstec_bduRU
PHP Group PHP5.6.0 → 5.6.13fstec_bduRU

showing 20 of 63

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-1425PHP: Mehrere SchwachstellenDeutsch2015-09-07csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in PHP ausnutzen, um beliebigen Code mit den Rechten des Dienstes auszuführen, um einen Denial of Service Zustand hervorrufen oder um Informationen offenzulegen.

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2016-05-16modified 2026-06-17

references (21)

External citations — patches, advisories, analysis.

scry

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