CVE-2011-1583

Multiple integer overflows in tools/libxc/xc_dom_bzimageloader.c in Xen 3.2, 3.3, 4.0, and 4.1 allow local users to cause a denial of service and possibly execute arbitrary code via a crafted paravirtualised guest kernel image that triggers (1) a buffer overflow during a decompression loop or (2) an out-of-bounds read in the loader involving unspecified length fields.

Published: 2011-08-12 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1583 is rated Moderate Risk (44.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.70%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-1583

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 2026-06-15 0.52% 0.70% +0.19%
2 2025-03-30 2.46% 0.52% -1.95%
3 2025-03-29 — 2.46% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1583

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.9 2.0 MEDIUM
AV:L/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.4 10.0 [email protected]

Weakness enumeration for CVE-2011-1583

OS Trackers for CVE-2011-1583

vendor priority summary link
debian not yet assigned CVE-2011-1583 not yet assigned priority: Debian including 1 source packages (xen), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2011-1583
redhat high — https://access.redhat.com/security/cve/CVE-2011-1583
ubuntu medium CVE-2011-1583 medium priority: Ubuntu including 4 source packages (xen, xen-3.1, xen-3.2, xen-3.3), 40 status rows across 10 suites (hardy, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, upstream): DNE 26, ignored 5, not-affected 5, needs-triage 3, released 1. https://ubuntu.com/security/CVE-2011-1583

Affected software / configurations for CVE-2011-1583

Vendor Product Version Raw CPE
citrix xen 3.2.0 cpe:2.3:a:citrix:xen:3.2.0:*:*:*:*:*:*:*
citrix xen 3.3.0 cpe:2.3:a:citrix:xen:3.3.0:*:*:*:*:*:*:*
citrix xen 4.0.0 cpe:2.3:a:citrix:xen:4.0.0:*:*:*:*:*:*:*
citrix xen 4.1.0 cpe:2.3:a:citrix:xen:4.1.0:*:*:*:*:*:*:*

References for CVE-2011-1583

cvelogic Threat Intelligence