What’s Vulnerable › Vulnerabilities
CVE-2021-39520
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.9% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2021-09-20 · updated 2026-06-17
- Weakness: CWE-476
Description
An issue was discovered in libjpeg through 2020021. A NULL pointer dereference exists in the function BlockBitmapRequester::PushReconstructedData() located in blockbitmaprequester.cpp. It allows an attacker to cause Denial of Service.
Affected products
- Jpeg Libjpeg: through 2020021
References
Get alerted when CVE-2021-39520 or the next vulnerability affects your stack