CVE-2021-25290 — Out-of-bounds Write in Pillow

CWE-787 — Out-of-bounds WriteCWE-120 — Classic Buffer Overflow12 documents8 sources
Severity
7.5HIGHNVD
OSV9.8OSV9.1
EPSS
0.1%
top 65.42%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Python PillowDebian LinuxPaloalto Pan-os
Timeline
PublishedMar 19
Latest updateMar 31

Description

An issue was discovered in Pillow before 8.1.1. In TiffDecode.c, there is a negative-offset memcpy with an invalid size.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages5 packages

▶NVDpython/pillow< 8.1.1
▶PyPIpython/pillow< 8.1.1
▶Debianpython/pillow< 8.1.1-1+3
▶Ubuntupython/pillow< 3.1.2-0ubuntu1.6+5
▶Palo Altopaloalto/pan-os

Also affects: Debian Linux 9.0

🔴Vulnerability Details

6
OSV
pillow vulnerabilities↗2026-03-31
▶
OSV
Out-of-bounds Write in Pillow↗2021-03-29
▶
GHSA
Out-of-bounds Write in Pillow↗2021-03-29
▶
CVEList
CVE-2021-25290: An issue was discovered in Pillow before 8↗2021-03-19
▶
OSV
CVE-2021-25290: An issue was discovered in Pillow before 8↗2021-03-19
▶

📋Vendor Advisories

5
Ubuntu
Pillow vulnerabilities↗2026-03-31
▶
Palo Alto
PAN-SA-2024-0001 Informational Bulletin: Impact of OSS CVEs in PAN-OS↗2024-02-14
▶
Ubuntu
Pillow vulnerabilities↗2021-03-11
▶
Red Hat
python-pillow: Negative-offset memcpy in TIFF image reader↗2021-02-28
▶
Debian
CVE-2021-25290: pillow - An issue was discovered in Pillow before 8.1.1. In TiffDecode.c, there is a nega...↗2021
▶
CVE-2021-25290 — Out-of-bounds Write in Python Pillow | cvebase