CVE-2020-21598

Name: CVE-2020-21598
Creator: NVD / NIST
Published: 2021-09-16T22:15:07.837+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.69%

Last modified Jun 17, 2026

CVE-2020-21598 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 1.69% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

1.69%

74.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Struktur	Libde265	1.0.4
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0

References

https://cwe.mitre.org/data/definitions/122.htmlTechnical Description, Third Party Advisory
https://github.com/strukturag/libde265/issues/237Exploit, Issue Tracking, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/01/msg00020.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2023/dsa-5346Third Party Advisory
https://cwe.mitre.org/data/definitions/122.htmlTechnical Description, Third Party Advisory
https://github.com/strukturag/libde265/issues/237Exploit, Issue Tracking, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/01/msg00020.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2023/dsa-5346Third Party Advisory

Timeline

Published: Sep 16, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-21598?

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.

How severe is CVE-2020-21598?

CVE-2020-21598 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.69% probability of exploitation in the next 30 days.

How do I fix CVE-2020-21598?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-21598?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST