CVE-2024-29068: snapd non-regular file indefinite blocking read

Severity: medium (CVSS 6.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-25 · updated 2026-06-17
Weakness: CWE-20

Description

In snapd versions prior to 2.62, snapd failed to properly check the file type when extracting a snap. The snap format is a squashfs file-system image and so can contain files that are non-regular files (such as pipes or sockets etc). Various file entries within the snap squashfs image (such as icons etc) are directly read by snapd when it is extracted. An attacker who could convince a user to install a malicious snap which contained non-regular files at these paths could then cause snapd to block indefinitely trying to read from such files and cause a denial of service.

Affected products

Canonical Ltd. snapd: before 2.62 — fixed in 2.62

How to fix

Upgrade to a fixed version: Canonical Ltd. snapd 2.62. Check the vendor advisory for mitigations.

References

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