9.8

CVE-2015-6834: php

Modified
AliasesUBUNTU-CVE-2015-6834
Published 16-05-2016Last modified 06-08-2024

Vulnerability summary

CVE-2015-6834 is a critical (CVSS 9.8) vulnerability in php. EPSS estimates a 46.80% chance of exploitation in the next 30 days, higher than 98.8% of scored vulnerabilities. 2 public exploits are recorded.

Priority
Prioritisepublic exploit

Public exploit (exploit-database, 09-09-2015)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.0 (NVD)
EPSS score
46.80%
0%100%
High · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits2exploit-database

Advisory lineage

Upstream 0 · Downstream 6 · Related 2
DLA-341-1DSA-3358-1MGASA-2015-0365RHSA-2016:0457SUSE-SU-2015:1633-1USN-2758-1

Timeline

  1. 16-05-2016
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

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 metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

46.80%

Chance of exploitation in the next 30 days

Percentile

99%

Versus all other CVEs

30-day change

No change 0.00 pp

From 46.80% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

2 found
  • exploit-databasedosphpVerified

    PHP 5.4/5.5/5.6 - SplDoublyLinkedList 'Unserialize()' Use-After-Free

    Maturity: poc

  • exploit-databasedosphpVerified

    PHP 5.4/5.5/5.6 - SplObjectStorage 'Unserialize()' Use-After-Free

    Maturity: poc

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Php1 product
  • phpEOL≤ 5.4.44 | 5.5.0 | 5.5.1 | 5.5.2 | 5.5.3 | 5.5.4 | 5.5.5 | 5.5.6 | 5.5.7 | 5.5.8 | 5.5.9 | 5.5.10 | 5.5.11 | 5.5.12 | 5.5.13 | 5.5.14 | 5.5.15 | 5.5.16 | 5.5.17 | 5.5.18 | 5.5.19 | 5.5.20 | 5.5.21 | 5.5.22 | 5.5.23 | 5.5.24 | 5.5.25 | 5.5.26 | 5.5.27 | 5.5.28 | 5.6.0 | 5.6.1 | 5.6.2 | 5.6.3 | 5.6.4 | 5.6.5 | 5.6.6 | 5.6.7 | 5.6.8 | 5.6.9 | 5.6.10 | 5.6.11 | 5.6.12
Ubuntu1 product
  • php5< 5.5.9+dfsg-1ubuntu4.13

2 vendors · 2 products

References

12 links
Show all 12 references