CVE-2026-107446
Received Received - Intake

Integer Overflow in containerd overlaybd Index Loading

Publication date: 2026-10-08

Last updated on: 2026-10-08

Assigner: MITRE

Description
containerd overlaybd through 1.0.18 has a do_load_index (LSMT index loading) integer overflow (and resultant out-of-bounds heap access) for index_bytes, if an untrusted overlaybd blob from a registry is used in a scenario with multiple overlaybd-backed containers.

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Meta Information

Published
2026-10-08
Last Modified
2026-10-08
Generated
2026-10-08
AI Q&A
2026-10-08
EPSS Evaluated
N/A
NVD
CVE-2026-107446
EUVD
EUVD-2026-94691

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
containerd overlaybd 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-190 The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

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Executive Summary

This vulnerability is an integer overflow in containerd overlaybd through version 1.0.18 that occurs during LSMT index loading. When an untrusted overlaybd blob from a registry is used with multiple overlaybd-backed containers, the index_bytes value can overflow, leading to an out-of-bounds heap access. This happens because the system fails to properly validate the size of index data before processing it.

Detection Guidance

This vulnerability involves an integer overflow in containerd overlaybd's LSMT index loading. Detection requires checking for oversized index files in overlaybd containers. Inspect logs for errors related to index loading or memory access violations. Use commands like 'journalctl -u containerd' or 'dmesg' to check for crashes. Examine overlaybd container configurations for untrusted blob sources.

Impact Analysis

This vulnerability could allow an attacker to cause a denial of service by crashing the system or corrupting memory. It may also potentially enable unauthorized access or code execution if exploited to manipulate memory contents. The impact depends on how overlaybd is used in your environment and whether untrusted registry blobs are involved.

Compliance Impact

The vulnerability involves an integer overflow leading to out-of-bounds heap access in containerd overlaybd, which could allow unauthorized memory access or denial-of-service in containerized environments. This could potentially compromise data integrity or availability, which are key concerns for GDPR and HIPAA compliance. However, the provided CVE details do not explicitly link this issue to compliance impacts.

Mitigation Strategies
  • Update containerd overlaybd to the latest patched version that includes index size validation checks.
  • Avoid using untrusted overlaybd blobs from registries in production environments.
  • Monitor system logs for index-related errors or crashes, especially after container startup.
  • Restrict container privileges and isolate overlaybd-backed containers from critical systems.

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