CVE catalog
CVE-2021-39516
libjpeg: CVE-2021-39516
- Severity
- Medium
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.85% · Oct 25, 2026
An issue was discovered in libjpeg through 2020021. A NULL pointer dereference exists in the function HuffmanDecoder::Get() located in huffmandecoder.hpp. It allows an attacker to cause Denial of Service.
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 | libjpeg | sid | 0.0~git20250815.25f7128-3 | fixed |
| Debian | libjpeg | forky | 0.0~git20250815.25f7128-3 | fixed |
| Debian | libjpeg | trixie | 0.0~git20241105.c719010-1 | fixed |
| Debian | libjpeg | bookworm | 0.0~git20220805.54ec643-1 | fixed |
| Ubuntu | libjpeg6b | pro | 1:6b2-2 | vulnerable |
| Ubuntu | libjpeg6b | pro | 1:6b2-2ubuntu0.1~esm1 | vulnerable |
| Ubuntu | libjpeg | 20.04 | 0.0~git20190821.87636f3b26b4-1 | vulnerable |
| Ubuntu | libjpeg | 20.04 | 0.0~git20190821.87636f3b26b4-1.1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libjpeg | source | sid | 0.0~git20200925.f145908-1 | not yet assigned | Not reported | Not reported |
| Debian | libjpeg | source | forky | 0.0~git20200925.f145908-1 | not yet assigned | Not reported | Not reported |
| Debian | libjpeg | source | trixie | 0.0~git20200925.f145908-1 | not yet assigned | Not reported | Not reported |
| Debian | libjpeg | source | bookworm | 0.0~git20200925.f145908-1 | not yet assigned | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libjpeg-tools]Fixed
Source package: [libjpeg]
Details (2)
0.0~git20220805.54ec643-1· amd64 · bookwormFixed · Fixed:
0.0~git20200925.f145908-1dsa · libjpeg · debian · bookworm; dsa · libjpeg · debian · 12
0.0~git20220805.54ec643-1· arm64 · bookwormFixed · Fixed:
0.0~git20200925.f145908-1dsa · libjpeg · debian · bookworm; dsa · libjpeg · debian · 12
[Debian 13 (Trixie)]
- [libjpeg-tools]Fixed
Source package: [libjpeg]
Details (2)
0.0~git20241105.c719010-1· amd64 · trixieFixed · Fixed:
0.0~git20200925.f145908-1dsa · libjpeg · debian · 13
0.0~git20241105.c719010-1· arm64 · trixieFixed · Fixed:
0.0~git20200925.f145908-1dsa · libjpeg · debian · 13
Observed: