Is CVE-2015-8340 in the CISA KEV catalog?

No. CVE-2015-8340 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-8340?

CVE-2015-8340 has a CVSS v2 base score of 4.7 (MEDIUM).

What is the EPSS score for CVE-2015-8340?

CVE-2015-8340 has an EPSS score of 0.38% (30th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-8340?

Upgrade xen on debian 11 to 4.8.0~rc3-1 or later.

CVE & CISA-KEV Catalog

CVE-2015-8340

MEDIUM

4.7

CVSS v2

NVD

Description

The memory_exchange function in common/memory.c in Xen 3.2.x through 4.6.x does not properly release locks, which might allow guest OS administrators to cause a denial of service (deadlock or host crash) via unspecified vectors, related to XENMEM_exchange error handling.

CWE-17

How to fix

Remediation Available

xenDebian

Fixed in:4.8.0~rc3-1CVE-2015-8340

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

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

0.38%probability of exploitation in 30 days

30thpercentile

Low risk: more likely to be exploited than 30% of all known CVEs.

References

Patch1

support.citrix.com

Vendor Advisory1

xenbits.xen.org

Other references4

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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.