// For flags

CVE-2011-2519

kernel: xen: x86_emulate: fix SAHF emulation

Severity Score

5.5
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Xen in the Linux kernel, when running a guest on a host without hardware assisted paging (HAP), allows guest users to cause a denial of service (invalid pointer dereference and hypervisor crash) via the SAHF instruction.

Xen en el kernel de Linux, al ejecutar como invitado en una máquina sin paginación asistida por hardware (HAP), permite a usuarios invitados causar denegación de servicio (referencia a puntero inválido y caída del hipervisor) a través de la instrucción SAHF.

The kernel packages contain the Linux kernel, the core of any Linux operating system. A NULL pointer dereference flaw was found in the Linux kernel's Stream Control Transmission Protocol implementation. A remote attacker could send a specially-crafted SCTP packet to a target system, resulting in a denial of service. A flaw in the Linux kernel's client-side NFS Lock Manager implementation could allow a local, unprivileged user to cause a denial of service.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Adjacent
Attack Complexity
Low
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Complete
Attack Vector
Adjacent
Attack Complexity
Medium
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2011-06-15 CVE Reserved
  • 2011-09-07 CVE Published
  • 2024-08-06 CVE Updated
  • 2025-06-06 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-476: NULL Pointer Dereference
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Xen
Search vendor "Xen"
 Xen
Search vendor "Xen" for product "Xen"
 < 3.3.0
Search vendor "Xen" for product "Xen" and version " < 3.3.0"
-
Affected
Redhat
Search vendor "Redhat"
 Enterprise Linux Desktop
Search vendor "Redhat" for product "Enterprise Linux Desktop"
 5.0
Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "5.0"
-
Affected
Redhat
Search vendor "Redhat"
 Enterprise Linux Server
Search vendor "Redhat" for product "Enterprise Linux Server"
 5.0
Search vendor "Redhat" for product "Enterprise Linux Server" and version "5.0"
-
Affected
Redhat
Search vendor "Redhat"
 Enterprise Linux Workstation
Search vendor "Redhat" for product "Enterprise Linux Workstation"
 5.0
Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "5.0"
-
Affected