CVE-2015-6831

HIGH
7.3
CVSS Score
Published: January 19, 2016 at 02:00 AM UTC
Updated: June 17, 2026 at 12:31 AM UTC
2 products affected across 2 vendorsDebian LinuxPHP

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Severity
HIGH7.3
Exploit prediction
EPSS 7%

Description

Multiple use-after-free vulnerabilities in SPL in PHP before 5.4.44, 5.5.x before 5.5.28, and 5.6.x before 5.6.12 allow remote attackers to execute arbitrary code via vectors involving (1) ArrayObject, (2) SplObjectStorage, and (3) SplDoublyLinkedList, which are mishandled during unserialization.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

PHP· PHPdrupal
95%
v < 5.4.445.5.0 ≤ v < 5.5.285.6.0 ≤ v < 5.6.12
Affected range stops below 5.4.44, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.5.28, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.6.12, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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