CVE catalog

CVE-2021-25291

pillow affected and fixed versions

An issue was discovered in Pillow before 8.1.1. In TiffDecode.c, there is an out-of-bounds read in TiffreadRGBATile via invalid tile boundaries.

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Feb 28, 2021, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.40% · Oct 27, 2026

Projects and upstream resources

[pillow][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie-security	pillow	`11.1.0-5+deb13u3`	Fixed	[CVE-2021-25291]
Debiantrixie	pillow	`11.1.0-5+deb13u4`	Fixed	[CVE-2021-25291]
Debiantrixie	pillow	`8.1.1-1`	FixedDistribution-reported fixed boundary	[CVE-2021-25291]
Debiansid	pillow	`13.0.0-1`	Fixed	[CVE-2021-25291]
Debiansid	pillow	`8.1.1-1`	FixedDistribution-reported fixed boundary	[CVE-2021-25291]
Debianforky	pillow	`12.3.0-1`	Fixed	[CVE-2021-25291]
Debianforky	pillow	`8.1.1-1`	FixedDistribution-reported fixed boundary	[CVE-2021-25291]
Debianbookworm-security	pillow	`9.4.0-1.1+deb12u1`	Fixed	[CVE-2021-25291]
Debianbookworm	pillow	`8.1.1-1`	FixedDistribution-reported fixed boundary	[CVE-2021-25291]
Debianbookworm	pillow	`9.4.0-1.1+deb12u1`	Fixed	[CVE-2021-25291]

Showing 10 fix observations. All 24 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
Alpine3.14	py3-pillow	`8.1.2-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-25291]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.15	py3-pillow	`8.1.2-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-25291]Oct 23, 2026, 5:17:56 PM UTC
Debianbookworm	pillow	`8.1.1-1`	FixedDistribution-reported fixed boundary	[CVE-2021-25291]
Debianbookworm	pillow	`9.4.0-1.1+deb12u1`	Fixed	[CVE-2021-25291]
Debianbookworm-security	pillow	`9.4.0-1.1+deb12u1`	Fixed	[CVE-2021-25291]
Debianforky	pillow	`12.3.0-1`	Fixed	[CVE-2021-25291]
Debianforky	pillow	`8.1.1-1`	FixedDistribution-reported fixed boundary	[CVE-2021-25291]
Debiansid	pillow	`13.0.0-1`	Fixed	[CVE-2021-25291]
Debiansid	pillow	`8.1.1-1`	FixedDistribution-reported fixed boundary	[CVE-2021-25291]
Debiantrixie	pillow	`11.1.0-5+deb13u4`	Fixed	[CVE-2021-25291]
Debiantrixie	pillow	`8.1.1-1`	FixedDistribution-reported fixed boundary	[CVE-2021-25291]
Debiantrixie-security	pillow	`11.1.0-5+deb13u3`	Fixed	[CVE-2021-25291]
Ubuntu20.04	pillow	`6.1.0-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-25291]Feb 4, 2026, 2:36:45 AM UTC
Ubuntu20.04	pillow	`6.1.0-1build1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-25291]Feb 4, 2026, 2:36:45 AM UTC
Ubuntu20.04	pillow	`6.2.1-2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-25291]Feb 4, 2026, 2:36:45 AM UTC
Ubuntu20.04	pillow	`7.0.0-4`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-25291]Feb 4, 2026, 2:36:45 AM UTC
Ubuntu20.04	pillow	`7.0.0-4build1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-25291]Feb 4, 2026, 2:36:45 AM UTC
Ubuntu20.04	pillow	`7.0.0-4ubuntu0.1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-25291]Feb 4, 2026, 2:36:45 AM UTC
Ubuntu20.04	pillow	`7.0.0-4ubuntu0.2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-25291]Feb 4, 2026, 2:36:45 AM UTC
Ubuntu20.04	pillow	`7.0.0-4ubuntu0.3`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-25291]Feb 4, 2026, 2:36:45 AM UTC
Ubuntupro	pillow-python2	`6.2.1-3`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-25291]Feb 4, 2026, 2:36:45 AM UTC
Ubuntupro	pillow-python2	`6.2.1-3ubuntu0.1~esm1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-25291]Feb 4, 2026, 2:36:45 AM UTC
Ubuntupro	pillow-python2	`6.2.1-3ubuntu0.1~esm2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-25291]Feb 4, 2026, 2:36:45 AM UTC
Ubuntupro	pillow-python2	`6.2.1-3~build1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-25291]Feb 4, 2026, 2:36:45 AM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "pillow",
      "status": "fixed",
      "release": "sid",
      "version": "13.0.0-1"
    },
    {
      "name": "pillow",
      "status": "fixed",
      "release": "forky",
      "version": "12.3.0-1"
    },
    {
      "name": "pillow",
      "status": "fixed",
      "release": "trixie",
      "version": "11.1.0-5+deb13u4"
    },
    {
      "name": "pillow",
      "status": "fixed",
      "release": "trixie-security",
      "version": "11.1.0-5+deb13u3"
    },
    {
      "name": "pillow",
      "status": "fixed",
      "release": "bookworm",
      "version": "9.4.0-1.1+deb12u1"
    },
    {
      "name": "pillow",
      "status": "fixed",
      "release": "bookworm-security",
      "version": "9.4.0-1.1+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "pillow",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "8.1.1-1"
    },
    {
      "bug": null,
      "name": "pillow",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "8.1.1-1"
    },
    {
      "bug": null,
      "name": "pillow",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "8.1.1-1"
    },
    {
      "bug": null,
      "name": "pillow",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "8.1.1-1"
    }
  ],
  "distribution_packages": [
    {
      "name": "py3-pillow",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.1.2-r0"
            }
          ]
        }
      ],
      "release": "3.14",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2021-25291",
      "fixed_version": "8.1.2-r0",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2021-25291",
      "provider_updated_at": "2026-10-23T17:17:56.162310856Z",
      "applicability_unknown": true
    },
    {
      "name": "py3-pillow",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.1.2-r0"
            }
          ]
        }
      ],
      "release": "3.15",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2021-25291",
      "fixed_version": "8.1.2-r0",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2021-25291",
      "provider_updated_at": "2026-10-23T17:17:56.162310856Z",
      "applicability_unknown": true
    },
    {
      "name": "pillow",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.0-4ubuntu0.3"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "6.1.0-1",
        "6.1.0-1build1",
        "6.2.1-2",
        "7.0.0-4",
        "7.0.0-4build1",
        "7.0.0-4ubuntu0.1",
        "7.0.0-4ubuntu0.2"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-25291",
      "fixed_version": "7.0.0-4ubuntu0.3",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-25291",
      "provider_updated_at": "2026-02-04T02:36:45.528094Z",
      "applicability_unknown": true
    },
    {
      "name": "pillow-python2",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "6.2.1-3~build1",
        "6.2.1-3",
        "6.2.1-3ubuntu0.1~esm1",
        "6.2.1-3ubuntu0.1~esm2"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-25291",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-25291",
      "provider_updated_at": "2026-02-04T02:36:45.528094Z",
      "applicability_unknown": true
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[python3-pil]Unknown
Source package: [pillow]
Details (4)
- 9.4.0-1.1+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · bookworm; dsa · pillow · debian · 12
- 9.4.0-1.1+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · bookworm; dsa · pillow · debian · 12
- 9.4.0-1.1+deb12u1 · amd64 · bookworm-security
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · bookworm; dsa · pillow · debian · 12
- 9.4.0-1.1+deb12u1 · arm64 · bookworm-security
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · bookworm; dsa · pillow · debian · 12
[python3-pil.imagetk]Unknown
Source package: [pillow]
Details (4)
- 9.4.0-1.1+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · bookworm; dsa · pillow · debian · 12
- 9.4.0-1.1+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · bookworm; dsa · pillow · debian · 12
- 9.4.0-1.1+deb12u1 · amd64 · bookworm-security
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · bookworm; dsa · pillow · debian · 12
- 9.4.0-1.1+deb12u1 · arm64 · bookworm-security
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · bookworm; dsa · pillow · debian · 12
[python-pil-doc]Unknown
Source package: [pillow]
Details (4)
- 9.4.0-1.1+deb12u1 · all · bookworm
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · bookworm; dsa · pillow · debian · 12
- 9.4.0-1.1+deb12u1 · all · bookworm
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · bookworm; dsa · pillow · debian · 12
- 9.4.0-1.1+deb12u1 · all · bookworm-security
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · bookworm; dsa · pillow · debian · 12
- 9.4.0-1.1+deb12u1 · all · bookworm-security
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · bookworm; dsa · pillow · debian · 12

[Debian 13 (Trixie)]

[python3-pil]Unknown
Source package: [pillow]
Details (4)
- 11.1.0-5+deb13u4 · amd64 · trixie
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · 13
- 11.1.0-5+deb13u4 · arm64 · trixie
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · 13
- 11.1.0-5+deb13u3 · amd64 · trixie-security
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · 13
- 11.1.0-5+deb13u3 · arm64 · trixie-security
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · 13
[python3-pil.imagetk]Unknown
Source package: [pillow]
Details (4)
- 11.1.0-5+deb13u4 · amd64 · trixie
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · 13
- 11.1.0-5+deb13u4 · arm64 · trixie
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · 13
- 11.1.0-5+deb13u3 · amd64 · trixie-security
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · 13
- 11.1.0-5+deb13u3 · arm64 · trixie-security
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · 13
[python-pil-doc]Unknown
Source package: [pillow]
Details (4)
- 11.1.0-5+deb13u4 · all · trixie
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · 13
- 11.1.0-5+deb13u4 · all · trixie
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · 13
- 11.1.0-5+deb13u3 · all · trixie-security
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · 13
- 11.1.0-5+deb13u3 · all · trixie-security
  Fixed · Fixed: 8.1.1-1
  dsa · pillow · debian · 13

Observed: Oct 23, 2026, 5:55:06 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]