CVE-2015-6838 is a NULL pointer dereference vulnerability in PHP versions prior to 5.4.45, 5.5.29, and 5.6.13, specifically within the xsl_ext_function_php function when used with libxml2 versions older than 2.9.2. This flaw allows remote attackers to trigger a denial of service by providing a specially crafted XML document. The vulnerability carries a CVSS v3 score of 7.5 (High), indicating a critical severity. It is easily exploitable over the network with low attack complexity, requiring no user interaction or privileges, and its primary impact is application availability. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage regarding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
5.6.0CPE matchmatch criteria | cpe:2.3:a:php:php:5.6.0:alpha1:*:*:*:*:*:* | ||
5.6.0CPE matchmatch criteria | cpe:2.3:a:php:php:5.6.0:alpha2:*:*:*:*:*:* | ||
5.6.0CPE matchmatch criteria | cpe:2.3:a:php:php:5.6.0:alpha3:*:*:*:*:*:* | ||
5.6.0CPE matchmatch criteria | cpe:2.3:a:php:php:5.6.0:alpha4:*:*:*:*:*:* | ||
5.6.0CPE matchmatch criteria | cpe:2.3:a:php:php:5.6.0:alpha5:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.