🛡️ CVE-2022-44640 on Debian — heimdal

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

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).

Distribution advisory

This page covers CVE-2022-44640 as tracked by Debian, for the package heimdal. The fix is available in version 7.8.git20221115.a6cf945+dfsg-1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

DEBIAN-CVE-2022-44640 is classified as CWE-415: Double Free. The same allocation is released twice, corrupting allocator bookkeeping.

Affected software

DEBIAN-CVE-2022-44640 is recorded against 2 packages.

  • heimdal (fixed in 7.8.git20221115.a6cf945+dfsg-1)
  • samba (fixed in 2:4.17.4+dfsg-1)

Timeline and source

Published on 25 December 2022 and last revised on 4 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security-tracker.debian.org (Advisory)

CVE-2022-44640 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2022-12-25
Updated 2026-08-12
Modified 2026-08-04
Fix URL N/A

Affected Packages

Software From version Fixed in
heimdal — 7.8.git20221115.a6cf945+dfsg-1
samba — 2:4.17.4+dfsg-1

Similar Threats

Exploit Protection

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DEBIAN-CVE-2022-44640 carries CVSS 9.8 Critical rating. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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