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No exploitation reportedFix available

CVE-2021-28021

No exploitation reported by the sources we read.

  • Published2021-10-15
  • WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Buffer overflow vulnerability in function stbi__extend_receive in stb_image.h in stb 2.26 via a crafted JPEG file.

Timeline

dates in UTC
  1. 2021-10-1516:15CVE publishedNVD

Versions per branch

NVD
Fedoraproject fedora
BranchAffectedFixed in
34.x= 34no fix published
35.x= 35no fix published
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
Stb project stb
BranchAffectedFixed in
2.26= 2.26no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • curaengineMageia:8all versions · fixed in 4.8.0-1.1.mga8
  • libstbUbuntu:26.10all versions · no fixed version listed
  • libstbUbuntu:26.04:LTSall versions · no fixed version listed
  • libstbUbuntu:25.10all versions · no fixed version listed
  • libstbUbuntu:24.04:LTSall versions · no fixed version listed
  • libstbUbuntu:22.04:LTSall versions · no fixed version listed
  • libstbUbuntu:20.04:LTSall versions · no fixed version listed
  • libstbDebian:14all versions · fixed in 0.0~git20220908.8b5f1f3+ds-1

10 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-28021 Red Hat Product Security3 known affected

    stb: buffer overflow in stbi__extend_receive() in stb_image.h via a crafted JPEG file

    clutter-devel as a component of Red Hat Enterprise Linux 6 · clutter-doc as a component of Red Hat Enterprise Linux 6 · clutter.src as a component of Red Hat Enterprise Linux 6

Full record on NVD

Fix

  1. No fix planned, says the vendor Red Hat Product Security CVE-2021-28021 · 3 productsOut of support scope

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2021-10-15
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-w9gr-856x-c2gv

Frequently asked questions

What is CVE-2021-28021?

Buffer overflow vulnerability in function stbi__extend_receive in stb_image.h in stb 2.26 via a crafted JPEG file.

Is CVE-2021-28021 actively exploited?

Active exploitation of CVE-2021-28021 has not been confirmed. Its EPSS score was 1.4% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-28021?

CVE-2021-28021 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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Sources for this record