High severity7.5NVD Advisory· Published Mar 3, 2021· Updated Jun 17, 2026
CVE-2021-27923
CVE-2021-27923
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
pillowPyPI | < 8.1.2 | 8.1.2 |
Affected products
14- Pillow/Pillowdescription
- osv-coords13 versionspkg:bitnami/pillowpkg:pypi/pillowpkg:rpm/almalinux/python3-pillowpkg:rpm/opensuse/python-CairoSVG&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/python-Pillow&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/python-Pillow&distro=openSUSE%20Leap%2015.5pkg:rpm/suse/python-Pillow&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/python-Pillow&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP6pkg:rpm/suse/python-Pillow&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/python-Pillow&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/python-Pillow&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/python-Pillow&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/python-Pillow&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209
< 8.1.1+ 12 more
- (no CPE)range: < 8.1.1
- (no CPE)range: < 8.1.2
- (no CPE)range: < 5.1.1-16.el8
- (no CPE)range: < 2.5.1-lp152.2.3.1
- (no CPE)range: < 8.3.1-lp152.5.3.1
- (no CPE)range: < 7.2.0-150300.3.15.1
- (no CPE)range: < 4.2.1-3.14.1
- (no CPE)range: < 7.2.0-150300.3.15.1
- (no CPE)range: < 2.8.1-4.22.1
- (no CPE)range: < 4.2.1-3.14.1
- (no CPE)range: < 5.2.0-3.8.1
- (no CPE)range: < 4.2.1-3.14.1
- (no CPE)range: < 5.2.0-3.8.1
Patches
Vulnerability mechanics
References
19- github.com/advisories/GHSA-95q3-8gr9-gm8wghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-27923ghsaADVISORY
- pillow.readthedocs.io/en/stable/releasenotes/8.1.1.htmlnvdRelease NotesVendor AdvisoryWEB
- security.gentoo.org/glsa/202107-33nvdThird Party AdvisoryWEB
- github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-42.yamlghsaWEB
- github.com/python-pillow/Pillow/commit/756fff33128a0b643d10518a26ad04b726dd8973ghsaWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S7G44Z33J4BNI2DPDROHWGVG2U7ZH5JUghsaWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQQY6472RX4J2SUJENWDZAWKTJJGP2MLghsaWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZTSY25UJU7NJUFHH3HWT575LT4TDFWBZghsaWEB
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S7G44Z33J4BNI2DPDROHWGVG2U7ZH5JUghsaWEB
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TQQY6472RX4J2SUJENWDZAWKTJJGP2MLghsaWEB
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZTSY25UJU7NJUFHH3HWT575LT4TDFWBZghsaWEB
- pillow.readthedocs.io/en/stable/releasenotes/8.1.2.htmlnvdWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S7G44Z33J4BNI2DPDROHWGVG2U7ZH5JU/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQQY6472RX4J2SUJENWDZAWKTJJGP2ML/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZTSY25UJU7NJUFHH3HWT575LT4TDFWBZ/nvd
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S7G44Z33J4BNI2DPDROHWGVG2U7ZH5JU/nvd
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TQQY6472RX4J2SUJENWDZAWKTJJGP2ML/nvd
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZTSY25UJU7NJUFHH3HWT575LT4TDFWBZ/nvd
News mentions
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