CVE-2015-2756: canonical ubuntu_linux
Vulnerability summary
CVE-2015-2756 is a medium (CVSS 4.9) vulnerability in canonical ubuntu_linux. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 39.1% of scored vulnerabilities.
Not severe (CVSS 4.9, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 2Timeline
- 01-04-2015PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
QEMU, as used in Xen 3.3.x through 4.5.x, does not properly restrict access to PCI command registers, which might allow local HVM guest 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.
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
0.45%
Chance of exploitation in the next 30 days
Percentile
39%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.45% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, no authentication (CVSS vector). Other conditions: not stated in public data.
Debian3 products
- qemu< 1:2.3+dfsg-3
- xen< 4.2.0~rc2-1
- debian_linuxEOL7.0 | 8.0
Ubuntu2 products
- qemu< 2.0.0+dfsg-2ubuntu1.11
- xen< 4.4.1-0ubuntu0.14.04.5
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 14.10 | 15.04
Fedoraproject1 product
- fedoraEOL20 | 21
Xen1 product
- xen4.3.0 | 4.3.1 | 4.3.2 | 4.4.0 | 4.4.1 | 4.5.0
5 vendors · 8 products
References
17 links- support.citrix.com/article/CTX206006X Refsource CONFIRM
- lists.fedoraproject.org/pipermail/package-announce/2015-April/155198.htmlVendor AdvisoryX Refsource FEDORA
- lists.fedoraproject.org/pipermail/package-announce/2015-April/154574.htmlVendor AdvisoryX Refsource FEDORA
- support.citrix.com/article/CTX201145X Refsource CONFIRM
Show all 17 references
- lists.fedoraproject.org/pipermail/package-announce/2015-April/154579.htmlVendor AdvisoryX Refsource FEDORA