CVE & CISA-KEV Catalog

CVE-2022-44640

CRITICALEPSS 76th pctl
9.8
CVSS v3
NVD

Description

Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the ASN.1 codec used by the Key Distribution Center (KDC).

CWE-415

How to fix

Remediation Available
heimdalDebian
Fixed in:7.7.0+dfsg-2+deb11u2CVE-2022-44640
Fixed in:7.8.git20221115.a6cf945+dfsg-1CVE-2022-44640
Fixed in:7.8.git20221115.a6cf945+dfsg-1CVE-2022-44640
Fixed in:7.8.git20221115.a6cf945+dfsg-1CVE-2022-44640
heimdalUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm3USN-5800-1
Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3USN-5800-1
Fixed in:7.5.0+dfsg-1ubuntu0.3USN-5800-1
Fixed in:7.7.0+dfsg-1ubuntu1.3USN-5800-1
libasn1-8-heimdalUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm3USN-5800-1
Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3USN-5800-1
Fixed in:7.5.0+dfsg-1ubuntu0.3USN-5800-1
Fixed in:7.7.0+dfsg-1ubuntu1.3USN-5800-1
libgssapi3-heimdalUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm3USN-5800-1
Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3USN-5800-1
Fixed in:7.5.0+dfsg-1ubuntu0.3USN-5800-1
Fixed in:7.7.0+dfsg-1ubuntu1.3USN-5800-1
libhdb9-heimdalUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm3USN-5800-1
Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3USN-5800-1
Fixed in:7.5.0+dfsg-1ubuntu0.3USN-5800-1
Fixed in:7.7.0+dfsg-1ubuntu1.3USN-5800-1
libhx509-5-heimdalUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm3USN-5800-1
Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3USN-5800-1
Fixed in:7.5.0+dfsg-1ubuntu0.3USN-5800-1
Fixed in:7.7.0+dfsg-1ubuntu1.3USN-5800-1
libkrb5-26-heimdalUbuntu
Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm3USN-5800-1
Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3USN-5800-1
Fixed in:7.5.0+dfsg-1ubuntu0.3USN-5800-1
Fixed in:7.7.0+dfsg-1ubuntu1.3USN-5800-1

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 VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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

Exploit Intelligence

1.84%probability of exploitation in 30 days
76thpercentile

Elevated risk: more likely to be exploited than 76% of all known CVEs.

References

Third-Party Advisory2
Other references1

Related Vulnerabilities

Other CWE-415 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2023-25136Medium6.590%-Fix
CVE-2018-0101Critical10.087%-Fix
CVE-2003-0545Critical9.885%-Fix
CVE-2019-3829Medium5.359%-Fix
CVE-2026-33824Critical9.856%-Fix
CVE-2021-3407Medium5.550%-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 2025-04-15.