Skip to content
Fencer Intel
critical 9.8

CVE-2022-44640 json

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 Distri…

published 3y ago modified 4mo ago also EUVD-2022-47576

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.3%
EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits
0
none known

Summary

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).

Patch / fix

  • heimdal_project heimdal 7.7.1
  • samba samba 4.15.3, 4.16.8, 4.17.4
  • samba Debian 14, Debian 13, Debian 12 2:4.17.4+dfsg-1
  • heimdal Debian 14, Debian 13, Debian 12 7.8.git20221115.a6cf945+dfsg-1

debian advisories DEBIAN-CVE-2022-44640

  • heimdal Ubuntu 18.04 LTS 7.5.0+dfsg-1ubuntu0.3
  • heimdal Ubuntu 20.04 LTS 7.7.0+dfsg-1ubuntu1.3
  • heimdal Ubuntu Pro 14.04 LTS 1.6~git20131207+dfsg-1ubuntu1.2+esm3
  • heimdal Ubuntu Pro 16.04 LTS 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3

ubuntu advisories UBUNTU-CVE-2022-44640

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • samba openSUSE Tumbleweed 4.17.4+git.300.305b22bfce-1.1
  • libheimdal Package Hub 15 SP3, openSUSE Leap 15.3 7.8.0-bp153.2.4.1
  • libheimdal Package Hub 15 SP4, openSUSE Leap 15.4 7.8.0-bp154.2.4.1

opensuse advisories openSUSE-SU-2024:12587-1openSUSE-SU-2023:0020-1openSUSE-SU-2023:0019-1

  • heimdal Alpine 3.24, Alpine 3.23, Alpine 3.22 +8 more 7.7.1-r0

alpine advisories ALPINE-CVE-2022-44640

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • samba Azure Linux 3.0 4.18.3-1

azure linux advisories AZL-44388

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2022-44640 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
last yr.

Exploit prediction

2.35% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.