CVE-2021-42779: fedoraproject fedora Use After Free
CVSS: 5.3v3.1MediumModified
AliasesUBUNTU-CVE-2021-42779DEBIAN-CVE-2021-42779
Published 18-04-2022Last modified 03-11-2025
Vulnerability summary
CVE-2021-42779 is a medium (CVSS 5.3) Use After Free vulnerability in fedoraproject fedora. EPSS estimates a 2.13% chance of exploitation in the next 30 days, higher than 81.7% of scored vulnerabilities.
CVSS score
5.3/10
010
Medium · v3.1 (NVD)EPSS score
2.13%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 7 · Related 4Timeline
- 18-04-2022PublishedVulnerability first disclosed.
- 03-11-2025Last modifiedVulnerability information updated.
Description
A heap use after free issue was found in Opensc before version 0.22.0 in sc_file_valid.
CVSS metrics
4 scores · 3 sources · 2 versionsMedium 5.3Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- OSV · DebianEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
2.13%
Chance of exploitation in the next 30 days
Percentile
82%
Versus all other CVEs
30-day change
0.00 pp
From 2.13% on 19-09-2026
19-09-202619-10-2026
EPSS score2.13%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- opensc< 0.22.0-1
Fedoraproject1 product
- fedoraEOL33
Opensc_project1 product
- opensc< 0.22.0
Redhat1 product
- enterprise_linuxEOL7.0 | 8.0
Ubuntu1 product
- openscAll versions (No fix recorded)
5 vendors · 5 products
References
11 links- bugs.chromium.org/p/oss-fuzz/issues/detail?id=28843Issue TrackingMailing ListPatchThird Party Advisory
