What’s Vulnerable › Vulnerabilities

CVE-2021-41688

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-06-28 · updated 2026-06-17
• Weakness: CWE-415

Description

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.

Affected products

• OFFIS DCMTK: through 3.6.6

References

• https://github.com/DCMTK/dcmtk
• https://github.com/DCMTK/dcmtk/commit/a9697dfeb672b0b9412c00c7d36d801e27ec85cb
• https://lists.debian.org/debian-lts-announce/2024/06/msg00022.html
• https://github.com/DCMTK/dcmtk
• https://github.com/DCMTK/dcmtk/commit/a9697dfeb672b0b9412c00c7d36d801e27ec85cb
• https://lists.debian.org/debian-lts-announce/2024/06/msg00022.html
• https://lists.debian.org/debian-lts-announce/2025/01/msg00032.html

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