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Fencer Intel
medium 6.0

CVE-2015-8551 json

The PCI backend driver in Xen, when running on an x86 system and using Linux 3.1.x through 4.3.x as the driver domain, allows local guest a…

published 10y ago modified 4mo ago also EUVD-2015-8431

cvss
6.0
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 39%
public exploits
0
none known

Summary

The PCI backend driver in Xen, when running on an x86 system and using Linux 3.1.x through 4.3.x as the driver domain, allows local guest administrators to hit BUG conditions and cause a denial of service (NULL pointer dereference and host OS crash) by leveraging a system with access to a passed-through MSI or MSI-X capable physical PCI device and a crafted sequence of XEN_PCI_OP_* operations, aka "Linux pciback missing sanity checks."

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.3.3-3

debian advisories DEBIAN-CVE-2015-8551

  • linux Ubuntu 14.04 LTS 3.13.0-74.118
  • linux-lts-wily Ubuntu 14.04 LTS 4.2.0-22.27~14.04.1
  • linux-lts-vivid Ubuntu 14.04 LTS 3.19.0-42.48~14.04.1
  • linux-lts-utopic Ubuntu 14.04 LTS 3.16.0-57.77~14.04.1

ubuntu advisories UBUNTU-CVE-2015-8551

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-ec2 SLE Module for Public Cloud 12 3.12.62-60.62.1
  • kernel-xen SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 3.12.62-60.62.1
  • kernel-syms SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 3.12.62-60.62.1
  • kernel-source SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 3.12.62-60.62.1
  • kernel-default SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 +1 more 3.12.62-60.62.1
  • kernel-obs-build SLE Software Development Kit 12 SP1 3.12.62-60.62.1
  • kernel-rt SLE Real Time 12 SP1 3.12.61-60.18.1
  • kernel-compute SLE Real Time 12 SP1 3.12.61-60.18.1

suse advisories SUSE-SU-2016:2105-1SUSE-SU-2016:1937-1SUSE-SU-2016:1764-1SUSE-SU-2016:1707-1SUSE-SU-2016:1203-1SUSE-SU-2016:1102-1

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-8551 updated cvss 5.2

xen: Linux pciback missing sanity checks leading to crash (XSA-157)

  • Red Hat Enterprise Linux 5 kernel-xen
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 6.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
NVD 2.0 4.7 AV:L/AC:M/Au:N/C:N/I:N/A:C

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.