CVE-2015-8551

MEDIUMNVD 6.06.0—
EchelonGraph scoreMEDIUM confidence

Score 6.0 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 6.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.0Exploit: None knownExposed: 0

A fix is available — apply it.

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."

CVSS v3
6.0
EG Score
6.0(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity60% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

April 13, 2016

Last Modified

June 17, 2026

References (24)

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-extra-4.2.0-22-generic (4.2.0-22.27~14.04.1) @ trusty2026-05-22ubuntu
ubuntulinux-image-3.2.0-97-virtual (3.2.0-97.137) @ precise2026-05-22ubuntu
ubuntulinux-image-4.2.0-22-powerpc64-smp (4.2.0-22.27) @ wily2026-05-22ubuntu
ubuntulinux-image-extra-3.13.0-74-generic (3.13.0-74.118) @ trusty2026-05-22ubuntu
ubuntulinux-image-extra-3.16.0-57-generic (3.16.0-57.77~14.04.1) @ trusty2026-05-22ubuntu
ubuntulinux-image-extra-3.19.0-42-generic (3.19.0-42.48~14.04.1) @ trusty2026-05-22ubuntu
ubuntulinux-image-3.19.0-42-powerpc64-smp (3.19.0-42.48) @ vivid2026-05-22ubuntu
ubuntulinux-image-3.13.0-74-generic-lpae (3.13.0-74.118~precise1) @ precise2026-05-22ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(8)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 11× in last 7d / 39× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 104 total refreshes for this CVE.

  1. 2026-07-26 14:50 UTCEPSS rescore
  2. 2026-07-25 14:13 UTCEPSS rescore
  3. 2026-07-24 14:13 UTCEPSS rescore
  4. 2026-07-23 14:14 UTCEPSS rescore
  5. 2026-07-23 01:20 UTCEG score recompute
  6. 2026-07-23 00:21 UTCEG score recompute
  7. 2026-07-22 22:00 UTCEG score recompute
  8. 2026-07-22 14:04 UTCEPSS rescore
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  21. 2026-07-13 22:26 UTCEPSS rescore
  22. 2026-07-13 22:26 UTCEPSS rescore
  23. 2026-07-12 10:38 UTCOSV refresh
  24. 2026-07-12 05:42 UTCEPSS rescore
  25. 2026-07-11 08:23 UTCEPSS rescore
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  1. 2026-07-09 19:05 UTCEPSS rescore
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  11. 2026-06-30 23:19 UTCEPSS rescore
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  20. 2026-06-23 21:30 UTCEPSS rescore
  21. 2026-06-23 16:20 UTCOSV refresh
  22. 2026-06-22 14:23 UTCEPSS rescore
  23. 2026-06-22 14:23 UTCEPSS rescore
  24. 2026-06-21 14:54 UTCEPSS rescore
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  28. 2026-06-19 19:23 UTCEPSS rescore
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  30. 2026-06-18 17:50 UTCEPSS rescore
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  44. 2026-06-08 14:14 UTCEPSS rescore
  45. 2026-06-07 15:22 UTCEPSS rescore
  46. 2026-06-06 21:29 UTCOSV refresh
  47. 2026-06-06 13:45 UTCEPSS rescore
  48. 2026-06-05 22:44 UTCEPSS rescore
  49. 2026-06-05 06:08 UTCEPSS rescore
  50. 2026-06-05 06:08 UTCEPSS rescore
  51. 2026-06-04 13:10 UTCEPSS rescore
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  54. 2026-06-01 13:49 UTCEPSS rescore
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  68. 2026-05-22 21:15 UTCEPSS rescore
  69. 2026-05-22 20:50 UTCEG score recompute
  70. 2026-05-22 20:50 UTCVendor advisory
  71. 2026-05-22 20:50 UTCGHSA enrichment
  72. 2026-05-21 22:40 UTCEPSS rescore
  73. 2026-05-20 22:37 UTCEPSS rescore
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  75. 2026-05-20 11:21 UTCEPSS rescore

Frequently asked(5)

What is CVE-2015-8551?
CVE-2015-8551 is a medium vulnerability published on April 13, 2016. 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…
When was CVE-2015-8551 disclosed?
CVE-2015-8551 was first published in the National Vulnerability Database on April 13, 2016, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-8551 actively exploited?
CVE-2015-8551 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.2% of all scored CVEs.
What is the CVSS score of CVE-2015-8551?
CVE-2015-8551 has a CVSS v3 base score of 6.0 (NVD).
How do I remediate CVE-2015-8551?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-8551, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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