Is CVE-2015-2311 in the CISA KEV catalog?

No. CVE-2015-2311 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-2311?

CVE-2015-2311 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2015-2311?

CVE-2015-2311 has an EPSS score of 2.54% (83th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-2311?

Upgrade capnproto on debian 11 to 0.4.1-3 or later.

CVE & CISA-KEV Catalog

CVE-2015-2311

CRITICALEPSS 83th pctl

9.8

CVSS v3

NVD

Description

Integer underflow in Sandstorm Cap'n Proto before 0.4.1.1 and 0.5.x before 0.5.1.1 might allow remote peers to cause a denial of service or possibly obtain sensitive information from memory or execute arbitrary code via a crafted message.

CWE-191

How to fix

Remediation Available

capnprotoDebian

Fixed in:0.4.1-3CVE-2015-2311

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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

2.54%probability of exploitation in 30 days

83rdpercentile

Elevated risk: more likely to be exploited than 83% of all known CVEs.

References

Third-Party Advisory4

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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 2026-05-13.