CVE-2021-28676: fedoraproject fedora Infinite Loop
CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2021-28676GHSA-7r7m-5h27-29hpBIT-pillow-2021-28676PYSEC-2021-92UBUNTU-CVE-2021-28676DEBIAN-CVE-2021-28676
Published 02-06-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-28676 is a high (CVSS 7.5) Infinite Loop vulnerability in fedoraproject fedora. EPSS estimates a 2.50% chance of exploitation in the next 30 days, higher than 84.4% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
2.50%
0%100%
Low · -0.02 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 8 · Related 6Timeline
- 02-06-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in Pillow before 8.2.0. For FLI data, FliDecode did not properly check that the block advance was non-zero, potentially leading to an infinite loop on load.
CVSS metrics
7 scores · 5 sources · 3 versionsHigh 8.7Preferred score · OSV · Pypi (Ecosystem advisory) · calculated from vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NSourcesSingle source
High 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 5 agree
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · PypiEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
2.50%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
-0.02 pp
From 2.52% on 18-09-2026
18-09-202618-10-2026
EPSS score2.50%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu2 products
- pillow< 2.3.0-1ubuntu3.4+esm5 | < 3.1.2-0ubuntu1.6+esm3 | < 5.1.0-1ubuntu0.6 | < 7.0.0-4ubuntu0.4
- pillow-python2All versions (No fix recorded)
Alpine1 product
- py3-pillow< 8.2.0-r0
Debian1 product
- pillow< 8.1.2+dfsg-0.2
Fedoraproject1 product
- fedoraEOL33
PyPI1 product
- pillow< 8.2.0
Python1 product
- pillow< 8.2.0
6 vendors · 7 products
