CVE-2015-7835 is a critical vulnerability affecting Xen versions 3.4 through 4.6.x, specifically within the mod_l2_entry function in arch/x86/mm.c. This flaw allows local administrators of a PV guest to elevate their privileges by manipulating superpage mappings due to improper validation of level 2 page table entries. With a CVSS score of 7.2, it presents a high risk of complete compromise of confidentiality, integrity, and availability, requiring local access but with low attack complexity. While there is no known active exploitation, public exploit code, or Metasploit/Nuclei modules, the vulnerability has received some community discussion and media coverage, indicating awareness within the security community.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
3.4.0CPE matchmatch criteria | cpe:2.3:o:xen:xen:3.4.0:*:*:*:*:*:*:* | ||
3.4.1CPE matchmatch criteria | cpe:2.3:o:xen:xen:3.4.1:*:*:*:*:*:*:* | ||
3.4.2CPE matchmatch criteria | cpe:2.3:o:xen:xen:3.4.2:*:*:*:*:*:*:* | ||
3.4.3CPE matchmatch criteria | cpe:2.3:o:xen:xen:3.4.3:*:*:*:*:*:*:* | ||
3.4.4CPE matchmatch criteria | cpe:2.3:o:xen:xen:3.4.4:*:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:L/AC:L/Au:N/C:C/I:C/A:C
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.5 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.