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[USN-8586-1] libgphoto2 vulnerabilities

Posted on 22 July 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8586-1
July 22, 2026

libgphoto2 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in libgphoto2.

Software Description:
- libgphoto2: gphoto2 digital camera library

Details:

It was discovered that libgphoto2 did not properly validate buffer
boundaries when parsing EOS image format data. An attacker with physical
access could possibly use this issue to obtain sensitive information.
(CVE-2026-40333)

It was discovered that libgphoto2 did not properly null-terminate buffers
when parsing Canon folder entries. An attacker with physical access could
possibly use this issue to obtain sensitive information. (CVE-2026-40334)

It was discovered that libgphoto2 did not properly validate buffer
boundaries when parsing device property values. An attacker with physical
access could possibly use this issue to obtain sensitive information.
(CVE-2026-40335)

It was discovered that libgphoto2 had a memory leak when parsing Sony
device property descriptors. An attacker with physical access could
possibly use this issue to cause a denial of service. This issue only
affected Ubuntu 26.04 LTS. (CVE-2026-40336)

It was discovered that libgphoto2 did not properly validate buffer
boundaries when parsing Sony device property enumeration data. An attacker
with physical access could possibly use this issue to obtain sensitive
information. (CVE-2026-40338)

It was discovered that libgphoto2 did not properly validate buffer
boundaries when parsing Sony device property form flags. An attacker with
physical access could possibly use this issue to obtain sensitive
information. (CVE-2026-40339)

It was discovered that libgphoto2 did not properly validate buffer
boundaries when parsing object information. An attacker with physical
access could possibly use this issue to obtain sensitive information.
(CVE-2026-40340)

It was discovered that libgphoto2 did not properly validate buffer
boundaries when parsing EOS focus information. An attacker with physical
access could possibly use this issue to cause libgphoto2 to crash,
resulting in a denial of service. (CVE-2026-40341)

Update instructions:

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

Ubuntu 26.04 LTS
libgphoto2-6t64 2.5.33-1ubuntu1.1

Ubuntu 24.04 LTS
libgphoto2-6t64 2.5.31-2.1ubuntu1.1

Ubuntu 22.04 LTS
libgphoto2-6 2.5.27-1ubuntu0.1

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

References:
https://ubuntu.com/security/notices/USN-8586-1
CVE-2026-40333, CVE-2026-40334, CVE-2026-40335, CVE-2026-40336,
CVE-2026-40338, CVE-2026-40339, CVE-2026-40340, CVE-2026-40341

Package Information:
https://launchpad.net/ubuntu/+source/libgphoto2/2.5.33-1ubuntu1.1
https://launchpad.net/ubuntu/+source/libgphoto2/2.5.31-2.1ubuntu1.1
https://launchpad.net/ubuntu/+source/libgphoto2/2.5.27-1ubuntu0.1

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