CVE-2015-6831

Publication date 27 August 2015

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.3 · High

Score breakdown

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.

Status

Package Ubuntu Release Status
php5 15.04 vivid
Fixed 5.6.4+dfsg-4ubuntu6.3
14.04 LTS trusty
Fixed 5.5.9+dfsg-1ubuntu4.13
12.04 LTS precise
Fixed 5.3.10-1ubuntu3.20

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
php5

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.3 · High

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References

Related Ubuntu Security Notices (USN)

    • USN-2758-1
    • PHP vulnerabilities
    • 30 September 2015

Other references

Access our resources on patching vulnerabilities