Xen 3.3.x through 4.5.x and the Linux kernel through 3.19.1 do not properly restrict access to PCI command registers, which might allow local guest OS users to cause a denial of service (non-maskable interrupt and host crash) by disabling the (1) memory or (2) I/O decoding for a PCI Express device and then accessing the device, which triggers an Unsupported Request (UR) response.
Conclusion & alert: CVE-2015-2150 is rated Low Risk (29.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.10%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-05-18 | 0.04% | 0.10% | +0.06% |
| 2 | 2025-04-16 | 0.06% | 0.04% | -0.02% |
| 3 | 2025-03-30 | — | 0.06% | — |
Full EPSS history (6 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.9 | 2.0 | MEDIUM |
|
3.9 | 6.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2015-2150 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2015-2150 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2015-2150 |
ubuntu
|
medium | CVE-2015-2150 medium priority: Ubuntu including 102 source packages (linux, linux-armadaxp, …), 921 status rows across 16 suites (artful, bionic, focal, jammy, lucid, noble, plucky, precise, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): DNE 625, not-affected 140, released 109, ignored 47. | https://ubuntu.com/security/CVE-2015-2150 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| ubuntu | ubuntu | 12.04 | cpe:2.3:o:ubuntu:ubuntu:12.04:*:lts:*:*:*:*:* |
| xen | xen | 3.3.0 | cpe:2.3:o:xen:xen:3.3.0:*:*:*:*:*:*:* |
| xen | xen | 3.3.1 | cpe:2.3:o:xen:xen:3.3.1:*:*:*:*:*:*:* |
| xen | xen | 3.3.2 | cpe:2.3:o:xen:xen:3.3.2:*:*:*:*:*:*:* |
| xen | xen | 3.4.0 | cpe:2.3:o:xen:xen:3.4.0:*:*:*:*:*:*:* |
| xen | xen | 3.4.1 | cpe:2.3:o:xen:xen:3.4.1:*:*:*:*:*:*:* |
| xen | xen | 3.4.2 | cpe:2.3:o:xen:xen:3.4.2:*:*:*:*:*:*:* |
| xen | xen | 3.4.3 | cpe:2.3:o:xen:xen:3.4.3:*:*:*:*:*:*:* |
| xen | xen | 3.4.4 | cpe:2.3:o:xen:xen:3.4.4:*:*:*:*:*:*:* |
| xen | xen | 4.0.0 | cpe:2.3:o:xen:xen:4.0.0:*:*:*:*:*:*:* |
| xen | xen | 4.0.1 | cpe:2.3:o:xen:xen:4.0.1:*:*:*:*:*:*:* |
| xen | xen | 4.0.2 | cpe:2.3:o:xen:xen:4.0.2:*:*:*:*:*:*:* |
| xen | xen | 4.0.3 | cpe:2.3:o:xen:xen:4.0.3:*:*:*:*:*:*:* |
| xen | xen | 4.0.4 | cpe:2.3:o:xen:xen:4.0.4:*:*:*:*:*:*:* |
| xen | xen | 4.1.0 | cpe:2.3:o:xen:xen:4.1.0:*:*:*:*:*:*:* |
| xen | xen | 4.1.1 | cpe:2.3:o:xen:xen:4.1.1:*:*:*:*:*:*:* |
| xen | xen | 4.1.2 | cpe:2.3:o:xen:xen:4.1.2:*:*:*:*:*:*:* |
| xen | xen | 4.1.3 | cpe:2.3:o:xen:xen:4.1.3:*:*:*:*:*:*:* |
| xen | xen | 4.1.4 | cpe:2.3:o:xen:xen:4.1.4:*:*:*:*:*:*:* |
| xen | xen | 4.1.5 | cpe:2.3:o:xen:xen:4.1.5:*:*:*:*:*:*:* |
| xen | xen | 4.1.6.1 | cpe:2.3:o:xen:xen:4.1.6.1:*:*:*:*:*:*:* |
| xen | xen | 4.2.0 | cpe:2.3:o:xen:xen:4.2.0:*:*:*:*:*:*:* |
| xen | xen | 4.2.1 | cpe:2.3:o:xen:xen:4.2.1:*:*:*:*:*:*:* |
| xen | xen | 4.2.2 | cpe:2.3:o:xen:xen:4.2.2:*:*:*:*:*:*:* |
| xen | xen | 4.2.3 | cpe:2.3:o:xen:xen:4.2.3:*:*:*:*:*:*:* |
| xen | xen | 4.3.0 | cpe:2.3:o:xen:xen:4.3.0:*:*:*:*:*:*:* |
| xen | xen | 4.3.1 | cpe:2.3:o:xen:xen:4.3.1:*:*:*:*:*:*:* |
| xen | xen | 4.4.0 | cpe:2.3:o:xen:xen:4.4.0:*:*:*:*:*:*:* |
| xen | xen | 4.4.0 | cpe:2.3:o:xen:xen:4.4.0:rc1:*:*:*:*:*:* |
| xen | xen | 4.4.1 | cpe:2.3:o:xen:xen:4.4.1:-:*:*:*:*:*:* |
| xen | xen | 4.5.0 | cpe:2.3:o:xen:xen:4.5.0:*:*:*:*:*:*:* |
| linux | linux_kernel | <= 3.19.1 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |