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No exploitation reportedFix available

CVE-2021-42782

No exploitation reported by the sources we read.

  • Published2022-04-18
  • WeaknessCWE-119 · CWE-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

Stack buffer overflow issues were found in Opensc before version 0.22.0 in various places that could potentially crash programs using the library.

Timeline

dates in UTC
  1. 2022-04-1817:15CVE publishedNVD

Versions per branch

NVD
Fedoraproject fedora
BranchAffectedFixed in
33.x= 33no fix published
Opensc project opensc
BranchAffectedFixed in
0.22< 0.22.00.22.0

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

  • openscUbuntu:Pro:24.04:LTSall versions · fixed in 0.25.0~rc1-1ubuntu0.1~esm1
  • openscUbuntu:Pro:22.04:LTSall versions · fixed in 0.22.0-1ubuntu2+esm1
  • openscUbuntu:Pro:20.04:LTSall versions · fixed in 0.20.0-3ubuntu0.1~esm4
  • openscUbuntu:Pro:20.04:LTSall versions · fixed in 0.20.0-3ubuntu0.1~esm2
  • openscUbuntu:Pro:18.04:LTSall versions · fixed in 0.17.0-3ubuntu0.1~esm2
  • openscUbuntu:Pro:16.04:LTSall versions · fixed in 0.15.0-1ubuntu1+esm2
  • openscSUSE:OpenStack Cloud Crowbar 9all versions · fixed in 0.13.0-3.19.1
  • openscSUSE:OpenStack Cloud Crowbar 8all versions · fixed in 0.13.0-3.19.1

38 more package ranges on OSV.dev

Full record on NVD

Fix

Advisories and patches

Detection

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

Sources

  • NVDCVSS 3.15.3read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • CNAweakness (CWE)CWE-119known since 2026-10-23
  • NVDweakness (CWE)CWE-787read 2026-10-23
  • FIRST EPSSEPSS score2.8 %2026-11-08
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Published
2022-04-18
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-xq25-8g7f-6hc5

Frequently asked questions

What is CVE-2021-42782?

Stack buffer overflow issues were found in Opensc before version 0.22.0 in various places that could potentially crash programs using the library.

Is CVE-2021-42782 actively exploited?

Active exploitation of CVE-2021-42782 has not been confirmed. Its EPSS score was 2.8% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-42782?

CVE-2021-42782 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

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