{"id":"CVE-2021-27923","details":"Pillow before 8.1.2 allows attackers to cause a denial of service (memory consumption) because the reported size of a contained image is not properly checked for an ICO container, and thus an attempted memory allocation can be very large.","aliases":["BIT-pillow-2021-27923","GHSA-95q3-8gr9-gm8w","PYSEC-2021-42"],"modified":"2026-04-10T04:31:37.503930Z","published":"2021-03-03T09:15:14.327Z","related":["ALSA-2021:4149","SUSE-SU-2021:1938-1","SUSE-SU-2021:1939-1","SUSE-SU-2021:1940-1","SUSE-SU-2024:1673-1","SUSE-SU-2024:1673-2","openSUSE-SU-2021:1134-1"],"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S7G44Z33J4BNI2DPDROHWGVG2U7ZH5JU/"},{"type":"WEB","url":"https://pillow.readthedocs.io/en/stable/releasenotes/8.1.2.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S7G44Z33J4BNI2DPDROHWGVG2U7ZH5JU/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQQY6472RX4J2SUJENWDZAWKTJJGP2ML/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZTSY25UJU7NJUFHH3HWT575LT4TDFWBZ/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TQQY6472RX4J2SUJENWDZAWKTJJGP2ML/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZTSY25UJU7NJUFHH3HWT575LT4TDFWBZ/"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202107-33"},{"type":"ADVISORY","url":"https://pillow.readthedocs.io/en/stable/releasenotes/8.1.1.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/python-pillow/pillow","events":[{"introduced":"0"},{"fixed":"741d8744a54bedbc49f16922c61a06fcb3681f53"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"8.1.1"}]}}],"versions":["1.0","1.2","1.7.7","1.7.8","2.0.0","2.1.0","2.2.0","2.2.1","2.3.0","2.5.0","2.7.0","2.8.0","2.8.1","2.9.0","2.9.0.dev0","2.9.0.dev1","2.9.0.dev2","3.1.0","3.1.0-rc1","3.2.0","3.3.0","3.4.0","4.0.0","4.0.0a","4.1.0","4.2.0","4.3.0","5.0.0","5.1.0","5.2.0","5.3.0","5.4.0","6.0.0","6.1.0","6.2.0","7.0.0","7.1.0","7.2.0","8.0.0","8.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-27923.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"32"}]},{"events":[{"introduced":"0"},{"last_affected":"33"}]},{"events":[{"introduced":"0"},{"last_affected":"34"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}