Is CVE-2015-8551 in the CISA KEV catalog?

No. CVE-2015-8551 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-8551?

CVE-2015-8551 has a CVSS v3 base score of 6.0 (MEDIUM).

What is the EPSS score for CVE-2015-8551?

CVE-2015-8551 has an EPSS score of 0.45% (36th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-8551?

Upgrade linux on debian 11 to 4.3.3-3 or later. Fixes are available for 34 affected products.

CVE & CISA-KEV Catalog

CVE-2015-8551

MEDIUM

6.0

CVSS v3

NVD

Description

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."

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

linuxDebian

Fixed in:4.3.3-3CVE-2015-8551

linuxUbuntu

Fixed in:3.13.0-74.118USN-2848-1

linux-image-3.13.0-74-genericUbuntu

Fixed in:3.13.0-74.118USN-2848-1

linux-image-3.13.0-74-generic-lpaeUbuntu

Fixed in:3.13.0-74.118USN-2848-1

linux-image-3.13.0-74-lowlatencyUbuntu

Fixed in:3.13.0-74.118USN-2848-1

linux-image-3.13.0-74-powerpc-e500Ubuntu

Fixed in:3.13.0-74.118USN-2848-1

linux-image-3.13.0-74-powerpc-e500mcUbuntu

Fixed in:3.13.0-74.118USN-2848-1

linux-image-3.13.0-74-powerpc-smpUbuntu

Fixed in:3.13.0-74.118USN-2848-1

linux-image-3.13.0-74-powerpc64-embUbuntu

Fixed in:3.13.0-74.118USN-2848-1

linux-image-3.13.0-74-powerpc64-smpUbuntu

Fixed in:3.13.0-74.118USN-2848-1

linux-image-3.16.0-57-genericUbuntu

Fixed in:3.16.0-57.77~14.04.1USN-2849-1

linux-image-3.16.0-57-generic-lpaeUbuntu

Fixed in:3.16.0-57.77~14.04.1USN-2849-1

linux-image-3.16.0-57-lowlatencyUbuntu

Fixed in:3.16.0-57.77~14.04.1USN-2849-1

linux-image-3.16.0-57-powerpc-e500mcUbuntu

Fixed in:3.16.0-57.77~14.04.1USN-2849-1

linux-image-3.16.0-57-powerpc-smpUbuntu

Fixed in:3.16.0-57.77~14.04.1USN-2849-1

linux-image-3.16.0-57-powerpc64-embUbuntu

Fixed in:3.16.0-57.77~14.04.1USN-2849-1

linux-image-3.16.0-57-powerpc64-smpUbuntu

Fixed in:3.16.0-57.77~14.04.1USN-2849-1

linux-image-3.19.0-42-genericUbuntu

Fixed in:3.19.0-42.48~14.04.1USN-2854-1

linux-image-3.19.0-42-generic-lpaeUbuntu

Fixed in:3.19.0-42.48~14.04.1USN-2854-1

linux-image-3.19.0-42-lowlatencyUbuntu

Fixed in:3.19.0-42.48~14.04.1USN-2854-1

linux-image-3.19.0-42-powerpc-e500mcUbuntu

Fixed in:3.19.0-42.48~14.04.1USN-2854-1

linux-image-3.19.0-42-powerpc-smpUbuntu

Fixed in:3.19.0-42.48~14.04.1USN-2854-1

linux-image-3.19.0-42-powerpc64-embUbuntu

Fixed in:3.19.0-42.48~14.04.1USN-2854-1

linux-image-3.19.0-42-powerpc64-smpUbuntu

Fixed in:3.19.0-42.48~14.04.1USN-2854-1

linux-image-4.2.0-22-genericUbuntu

Fixed in:4.2.0-22.27~14.04.1USN-2853-1

linux-image-4.2.0-22-generic-lpaeUbuntu

Fixed in:4.2.0-22.27~14.04.1USN-2853-1

linux-image-4.2.0-22-lowlatencyUbuntu

Fixed in:4.2.0-22.27~14.04.1USN-2853-1

linux-image-4.2.0-22-powerpc-e500mcUbuntu

Fixed in:4.2.0-22.27~14.04.1USN-2853-1

linux-image-4.2.0-22-powerpc-smpUbuntu

Fixed in:4.2.0-22.27~14.04.1USN-2853-1

linux-image-4.2.0-22-powerpc64-embUbuntu

Fixed in:4.2.0-22.27~14.04.1USN-2853-1

linux-image-4.2.0-22-powerpc64-smpUbuntu

Fixed in:4.2.0-22.27~14.04.1USN-2853-1

linux-lts-utopicUbuntu

Fixed in:3.16.0-57.77~14.04.1USN-2849-1

linux-lts-vividUbuntu

Fixed in:3.19.0-42.48~14.04.1USN-2854-1

linux-lts-wilyUbuntu

Fixed in:4.2.0-22.27~14.04.1USN-2853-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeChanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

Exploit Intelligence

0.45%probability of exploitation in 30 days

36thpercentile

Low risk: more likely to be exploited than 36% of all known CVEs.

References

Vendor Advisory1

xenbits.xen.org

Third-Party Advisory11

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-21758	High	7.5	92%	-	Fix
CVE-2023-21547	High	7.5	88%	-	Fix
CVE-2014-3470	Medium	4.3	86%	-	Fix
CVE-2021-44224	High	8.2	82%	-	Fix
CVE-2016-0742	High	7.5	82%	-	Fix
CVE-2009-1386	Medium	5.0	80%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.