6.2

CVE-2016-6259: citrix xenserver Improper Input Validation

Modified
AliasesALPINE-CVE-2016-6259UBUNTU-CVE-2016-6259DEBIAN-CVE-2016-6259
Published 02-08-2016Last modified 06-08-2024

Vulnerability summary

CVE-2016-6259 is a medium (CVSS 6.2) Improper Input Validation vulnerability in citrix xenserver. EPSS estimates a 0.64% chance of exploitation in the next 30 days, higher than 50.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.2, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.2/10
010
Medium · v3.0 (NVD)
EPSS score
0.64%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 3
MGASA-2017-0012OPENSUSE-SU-2024:10196-1SUSE-SU-2016:2093-1SUSE-SU-2016:2473-1

Timeline

  1. 02-08-2016
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allows local 32-bit PV guest OS kernels to cause a denial of service (hypervisor and VM crash) by triggering a safety check.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.64%

Chance of exploitation in the next 30 days

Percentile

51%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.64% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Alpine1 product
  • xen< 4.7.0-r0 | < 4.6.3-r1
Citrix1 product
  • xenserver6.0 | 6.0.2 | 6.1 | 6.2.0:sp1 | 6.5.0:sp1 | 7.0
Debian1 product
  • xen< 4.8.0~rc3-1
Ubuntu1 product
  • xen< 4.6.0-1ubuntu4.2
Xen1 product
  • xen4.5.0 | 4.5.1 | 4.5.2 | 4.5.3 | 4.6.0 | 4.6.1 | 4.6.3 | 4.7.0

5 vendors · 5 products

References

10 links