CVE-2020-21688

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

A heap-use-after-free in the av_freep function in libavutil/mem.c of FFmpeg 4.2 allows attackers to execute arbitrary code.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

VendorProductVersions
n/an/an/a

References

Timeline

Published
Aug 10, 2021
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2020

CVE-2020-21696.1A form validation endpoint in Jenkins Queue cleanup Plugin 1.3 and earlier does not properly escape a query parameter displayed in an error CVE-2020-216976.5A heap-use-after-free in the mpeg_mux_write_packet function in libavformat/mpegenc.c of FFmpeg 4.2 allows to cause a denial of service (DOS)CVE-2020-216997.5The web server Tengine 2.2.2 developed in the Nginx version from 0.5.6 thru 1.13.2 is vulnerable to an integer overflow vulnerability in theCVE-2020-21705.4Jenkins RapidDeploy Plugin 4.2 and earlier does not escape package names in the table of packages obtained from a remote server, resulting iCVE-2020-21718.8Jenkins RapidDeploy Plugin 4.2 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.CVE-2020-217105.5A divide by zero issue discovered in eps_print_page in gdevepsn.c in Artifex Software GhostScript 9.50 allows remote attackers to cause a deCVE-2020-21726.5Jenkins Code Coverage API Plugin 1.1.4 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.CVE-2020-217227.8Buffer Overflow vulnerability in oggvideotools 0.9.1 allows remote attackers to run arbitrary code via opening of crafted ogg file.CVE-2020-217235.5A Segmentation Fault issue discovered StreamSerializer::extractStreams function in streamSerializer.cpp in oggvideotools 0.9.1 allows remoteCVE-2020-217247.8Buffer Overflow vulnerability in ExtractorInformation function in streamExtractor.cpp in oggvideotools 0.9.1 allows remaote attackers to runCVE-2020-217259.8OpenSNS v6.1.0 contains a blind SQL injection vulnerability in /Controller/ChinaCityController.class.php via the pid parameter.CVE-2020-217269.8OpenSNS v6.1.0 contains a blind SQL injection vulnerability in /Controller/ChinaCityController.class.php via the cid parameter.
CVE-2020-21688: High severity, CVSS 8.8 | Vulnix