CVE catalog
CVE-2021-41688
DCMTK vulnerabilities
- Severity
- Medium
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.79% · Oct 25, 2026
DCMTK through 3.6.6 does not handle memory free properly. The object in the program is free but its address is still used in other locations. Sending specific requests to the dcmqrdb program will incur a double free. 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-2021-41688 | Not reported |
| Ubuntu | dcmtk | deb | 20.04 | 3.6.4-2.1ubuntu0.1 | Not reported | UBUNTU-CVE-2021-41688 | 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-2021-41688]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2021-41688]
- [https://security-tracker.debian.org/tracker/CVE-2021-41688]
- [https://ubuntu.com/security/notices/USN-7010-1]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Ubuntu Security Notices (USN)]