Ubuntu alert USN-8135-1 (pillow)

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noreply+usn-bot@canonical.com
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ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-8135-1] Pillow vulnerabilities
Date:
             
 
Tue, 31 Mar 2026 10:46:11 +0000
Message-ID:
             
 
<E1w7Wbr-0006M7-4n@lists.ubuntu.com>
==========================================================================
Ubuntu Security Notice USN-8135-1
March 31, 2026

pillow vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Pillow.

Software Description:
- pillow: Python Imaging Library

Details:

It was discovered that Pillow did not correctly handle reading J2K files,
which could lead to an out-of-bounds read vulnerability. If a user or
automated system were tricked into opening a specially crafted file, an
attacker could possibly use this issue to cause a denial of service. This
issue only affected Ubuntu 16.04 LTS. (CVE-2021-25287, CVE-2021-25288)

It was discovered that Pillow did not correctly handle certain integer
arithmetic, which could lead to a buffer overflow. An attacker could
possibly use this issue to cause a denial of service or execute arbitrary
code. This issue only affected Ubuntu 14.04 LTS. (CVE-2021-25290)

It was discovered that Pillow did not correctly perform bounds checking
for certain operations. An attacker could possibly use this issue to
cause a denial of service. This issue only affected Ubuntu 14.04 LTS
and Ubuntu 16.04 LTS. (CVE-2021-28675, CVE-2021-28676, CVE-2021-28677)

It was discovered that Pillow did not correctly handle certain memory
operations. An attacker could possibly use this issue to cause a denial
of service. (CVE-2023-44271)

It was discovered that Pillow did not correctly sanitize certain inputs.
An attacker could possibly use this issue to execute arbitrary code.
(CVE-2023-50447)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS
  python-pil                      5.1.0-1ubuntu0.8+esm2
                                  Available with Ubuntu Pro
  python3-pil                     5.1.0-1ubuntu0.8+esm2
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  python-pil                      3.1.2-0ubuntu1.6+esm3
                                  Available with Ubuntu Pro
  python3-pil                     3.1.2-0ubuntu1.6+esm3
                                  Available with Ubuntu Pro

Ubuntu 14.04 LTS
  python-pil                      2.3.0-1ubuntu3.4+esm5
                                  Available with Ubuntu Pro
  python3-pil                     2.3.0-1ubuntu3.4+esm5
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-8135-1
  CVE-2021-25287, CVE-2021-25288, CVE-2021-25290, CVE-2021-28675,
  CVE-2021-28676, CVE-2021-28677, CVE-2023-44271, CVE-2023-50447


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