What’s Vulnerable › Vulnerabilities

CVE-2022-44640

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-12-25 · updated 2026-06-17
• Weakness: CWE-415

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).

Affected products

• Heimdal Software Kerberos: before 7.7.1 — fixed in 7.7.1
• Samba: from 4.15.0 before 4.15.3; from 4.16.0 before 4.16.8; from 4.17.0 before 4.17.4 — fixed in 4.15.3, 4.16.8, 4.17.4

How to fix

Upgrade to a fixed version: Heimdal Software Kerberos 7.7.1; Samba 4.15.3, 4.16.8, 4.17.4. Check the vendor advisory for mitigations.

References

• https://github.com/heimdal/heimdal/security/advisories/GHSA-88pm-hfmq-7vv4
• https://security.gentoo.org/glsa/202310-06
• https://security.netapp.com/advisory/ntap-20230216-0008/
• https://github.com/heimdal/heimdal/security/advisories/GHSA-88pm-hfmq-7vv4
• https://security.gentoo.org/glsa/202310-06
• https://security.netapp.com/advisory/ntap-20230216-0008/

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