CVE-2021-28676
python-pillow: Infinite loop in FLI image reader
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 1, 2021
Updated · November 1, 2026
Description
A flaw was found in python-pillow. FliDecode.c did not properly check that the block advance was non-zero, potentially leading to an infinite loop on load. This issue dates to the PIL fork. The highest threat from this vulnerability is to system availability.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
To mitigate this feature on Red Hat Quay, keep the invoice generation feature disabled, as it is by default.
CVSS / CWE
CVSS 3.1 · 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-835 · Loop with Unreachable Exit Condition