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Vulnerability record · CVE-2021-4214 · published 24 August 2022

CVE-2021-4214: Libpng classic buffer overflow vulnerability

LLibpng · Libpng

A heap overflow flaw was found in libpngs' pngimage.c program. This flaw allows an attacker with local network access to pass a specially crafted PNG file to the pngimage utility, causing an application to crash, leading to a denial of service.

5.5 CVSS 3.1 Medium EPSS 0.52% · top 57.5% CWE-120 · Classic buffer overflowCWE-787 · Out-of-bounds write
5.5CVSS 3.1 base score
0.52%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
10References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

A heap overflow flaw was found in libpngs' pngimage.c program. This flaw allows an attacker with local network access to pass a specially crafted PNG file to the pngimage utility, causing an application to crash, leading to a denial of service.

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/security/cve/CVE-2021-4214 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2043393 ExploitIssue TrackingThird Party Advisory
https://github.com/glennrp/libpng/issues/302 ExploitThird Party Advisory
https://security-tracker.debian.org/tracker/CVE-2021-4214 Third Party Advisory
https://security.netapp.com/advisory/ntap-20221020-0001/ Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-4214 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2043393 ExploitIssue TrackingThird Party Advisory
https://github.com/glennrp/libpng/issues/302 ExploitThird Party Advisory
https://security-tracker.debian.org/tracker/CVE-2021-4214 Third Party Advisory
https://security.netapp.com/advisory/ntap-20221020-0001/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-4214), CISA KEV, FIRST EPSS (scores of 2026-10-08). This page is refreshed as NVD updates the record.