What’s Vulnerable › Vulnerabilities

CVE-2020-21598

• Severity: high (CVSS 8.8 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: yes
• Published: 2021-09-16 · updated 2026-06-17
• Weakness: CWE-787

Description

libde265 v1.0.4 contains a heap buffer overflow in the ff_hevc_put_unweighted_pred_8_sse function, which can be exploited via a crafted a file.

Affected products

• Debian Linux: 10.0, 11.0
• strukturag libde265: 1.0.4

References

• https://cwe.mitre.org/data/definitions/122.html
• https://github.com/strukturag/libde265/issues/237
• https://lists.debian.org/debian-lts-announce/2023/01/msg00020.html
• https://www.debian.org/security/2023/dsa-5346
• https://cwe.mitre.org/data/definitions/122.html
• https://github.com/strukturag/libde265/issues/237
• https://lists.debian.org/debian-lts-announce/2023/01/msg00020.html
• https://www.debian.org/security/2023/dsa-5346

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