Vulnerability · Published Dec 25, 2022 · Assigned by mitre
CVE-2022-44640
Critical 9.8
In plain English
A critical-severity double free in the heimdal package (Alpine). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.3% (higher than 84% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)2.3%top 16.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | heimdal | 7.7.1-r0 | ALPINE-CVE-2022-44640 |
| Alpine:v3.21 | heimdal | 7.7.1-r0 | ALPINE-CVE-2022-44640 |
| Alpine:v3.22 | heimdal | 7.7.1-r0 | ALPINE-CVE-2022-44640 |
| Alpine:v3.23 | heimdal | 7.7.1-r0 | ALPINE-CVE-2022-44640 |
| Alpine:v3.24 | heimdal | 7.7.1-r0 | ALPINE-CVE-2022-44640 |
| Debian:12 | heimdal | 7.8.git20221115.a6cf945+dfsg-1 | DEBIAN-CVE-2022-44640 |
| Debian:13 | heimdal | 7.8.git20221115.a6cf945+dfsg-1 | DEBIAN-CVE-2022-44640 |
| Debian:14 | heimdal | 7.8.git20221115.a6cf945+dfsg-1 | DEBIAN-CVE-2022-44640 |
| Debian:12 | samba | 2:4.17.4+dfsg-1 | DEBIAN-CVE-2022-44640 |
| Debian:13 | samba | 2:4.17.4+dfsg-1 | DEBIAN-CVE-2022-44640 |
| Debian:14 | samba | 2:4.17.4+dfsg-1 | DEBIAN-CVE-2022-44640 |
| Ubuntu:22.04:LTS | heimdal | no fix listed | UBUNTU-CVE-2022-44640 |
| Ubuntu:24.04:LTS | heimdal | no fix listed | UBUNTU-CVE-2022-44640 |
| Ubuntu:25.10 | heimdal | no fix listed | UBUNTU-CVE-2022-44640 |
| Ubuntu:26.04:LTS | heimdal | no fix listed | UBUNTU-CVE-2022-44640 |
| Ubuntu:26.10 | heimdal | no fix listed | UBUNTU-CVE-2022-44640 |
Affected products (as reported)
Weakness: CWE-415 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H