CVE catalog
CVE-2021-41690
DCMTK vulnerabilities
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.79% · Oct 25, 2026
DCMTK through 3.6.6 does not handle memory free properly. The malloced memory for storing all file information are recorded in a global variable LST and are not freed properly. Sending specific requests to the dcmqrdb program can incur a memory leak. An attacker can use it to launch a DoS attack.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | dcmtk | sid | 3.7.0+really3.7.0-7 | fixed |
| Debian | dcmtk | forky | 3.7.0+really3.7.0-7 | fixed |
| Debian | dcmtk | trixie | 3.6.9-5+deb13u3 | fixed |
| Debian | dcmtk | bookworm | 3.6.7-9~deb12u4 | fixed |
| Ubuntu | dcmtk | noble | 3.6.7-9.1ubuntu0.1~esm1 | fixed |
| Ubuntu | dcmtk-doc | noble | 3.6.7-9.1ubuntu0.1~esm1 | fixed |
| Ubuntu | libdcmtk-dev | noble | 3.6.7-9.1ubuntu0.1~esm1 | fixed |
| Ubuntu | libdcmtk17t64 | noble | 3.6.7-9.1ubuntu0.1~esm1 | fixed |
| Ubuntu | dcmtk | pro | 3.6.5-1 | vulnerable |
| Ubuntu | dcmtk | pro | 3.6.6-3ubuntu1 | vulnerable |
| Ubuntu | dcmtk | pro | 3.6.6-3ubuntu2 | vulnerable |
| Ubuntu | dcmtk | pro | 3.6.6-4 | vulnerable |
| Ubuntu | dcmtk | pro | 3.6.6-5 | vulnerable |
| Ubuntu | dcmtk | pro | 3.6.6-5ubuntu0.1~esm1 | fixed |
| Ubuntu | dcmtk | 20.04 | 3.6.4-2.1 | vulnerable |
| Ubuntu | dcmtk | 20.04 | 3.6.4-2.1build1 | vulnerable |
| Ubuntu | dcmtk | 20.04 | 3.6.4-2.1build2 | vulnerable |
| Ubuntu | dcmtk | 20.04 | 3.6.4-2.1ubuntu0.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | dcmtk | source | sid | 3.6.7-1 | not yet assigned | Not reported | Not reported |
| Debian | dcmtk | source | forky | 3.6.7-1 | not yet assigned | Not reported | Not reported |
| Debian | dcmtk | source | trixie | 3.6.7-1 | not yet assigned | Not reported | Not reported |
| Debian | dcmtk | source | bookworm | 3.6.7-1 | not yet assigned | Not reported | Not reported |
| Ubuntu | dcmtk | deb | noble | 3.6.7-9.1ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Ubuntu | dcmtk-doc | deb | noble | 3.6.7-9.1ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Ubuntu | libdcmtk-dev | deb | noble | 3.6.7-9.1ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Ubuntu | libdcmtk17t64 | deb | noble | 3.6.7-9.1ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Ubuntu | dcmtk | deb | pro | 3.6.6-5ubuntu0.1~esm1 | Not reported | UBUNTU-CVE-2021-41690 | Not reported |
| Ubuntu | dcmtk | deb | 20.04 | 3.6.4-2.1ubuntu0.1 | Not reported | UBUNTU-CVE-2021-41690 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [dcmtk]Fixed
Details (2)
3.6.7-9~deb12u4· amd64 · bookwormFixed · Fixed:
3.6.7-1usn · dcmtk · debian · bookworm; usn · dcmtk · debian · 12
3.6.7-9~deb12u4· arm64 · bookwormFixed · Fixed:
3.6.7-1usn · dcmtk · debian · bookworm; usn · dcmtk · debian · 12
- [dcmtk-doc]Fixed
Source package: [dcmtk]
Details (2)
3.6.7-9~deb12u4· all · bookwormFixed · Fixed:
3.6.7-1usn · dcmtk · debian · bookworm; usn · dcmtk · debian · 12
3.6.7-9~deb12u4· all · bookwormFixed · Fixed:
3.6.7-1usn · dcmtk · debian · bookworm; usn · dcmtk · debian · 12
- [libdcmtk17]Fixed
Source package: [dcmtk]
Details (2)
3.6.7-9~deb12u4· amd64 · bookwormFixed · Fixed:
3.6.7-1usn · dcmtk · debian · bookworm; usn · dcmtk · debian · 12
3.6.7-9~deb12u4· arm64 · bookwormFixed · Fixed:
3.6.7-1usn · dcmtk · debian · bookworm; usn · dcmtk · debian · 12
- [libdcmtk-dev]Fixed
Source package: [dcmtk]
Details (2)
3.6.7-9~deb12u4· amd64 · bookwormFixed · Fixed:
3.6.7-1usn · dcmtk · debian · bookworm; usn · dcmtk · debian · 12
3.6.7-9~deb12u4· arm64 · bookwormFixed · Fixed:
3.6.7-1usn · dcmtk · debian · bookworm; usn · dcmtk · debian · 12
[Debian 13 (Trixie)]
- [dcmtk]Fixed
Details (2)
3.6.9-5+deb13u2· amd64 · trixieFixed · Fixed:
3.6.7-1usn · dcmtk · debian · 13
3.6.9-5+deb13u2· arm64 · trixieFixed · Fixed:
3.6.7-1usn · dcmtk · debian · 13
- [dcmtk-data]Fixed
Source package: [dcmtk]
Details (2)
3.6.9-5+deb13u2· all · trixieFixed · Fixed:
3.6.7-1usn · dcmtk · debian · 13
3.6.9-5+deb13u2· all · trixieFixed · Fixed:
3.6.7-1usn · dcmtk · debian · 13
- [dcmtk-doc]Fixed
Source package: [dcmtk]
Details (2)
3.6.9-5+deb13u2· all · trixieFixed · Fixed:
3.6.7-1usn · dcmtk · debian · 13
3.6.9-5+deb13u2· all · trixieFixed · Fixed:
3.6.7-1usn · dcmtk · debian · 13
- [libdcmtk19]Fixed
Source package: [dcmtk]
Details (2)
3.6.9-5+deb13u2· amd64 · trixieFixed · Fixed:
3.6.7-1usn · dcmtk · debian · 13
3.6.9-5+deb13u2· arm64 · trixieFixed · Fixed:
3.6.7-1usn · dcmtk · debian · 13
- [libdcmtk-dev]Fixed
Source package: [dcmtk]
Details (2)
3.6.9-5+deb13u2· amd64 · trixieFixed · Fixed:
3.6.7-1usn · dcmtk · debian · 13
3.6.9-5+deb13u2· arm64 · trixieFixed · Fixed:
3.6.7-1usn · dcmtk · debian · 13
Observed:
References
- [https://osv.dev/vulnerability/DEBIAN-CVE-2021-41690]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2021-41690]
- [https://security-tracker.debian.org/tracker/CVE-2021-41690]
- [https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-41690.json]
- [https://ubuntu.com/security/notices/USN-7010-1]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [Ubuntu Security Notices (USN)]