Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. Prior to 2.18.1, a crafted payload as small as 4-5 bytes can force memory allocations of up to 16 GB, crashing any process with an OOM error (Denial of Service). This vulnerability is fixed in 2.18.1.
History

Tue, 28 Apr 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Nds-association
Nds-association zserio
CPEs cpe:2.3:a:nds-association:zserio:*:*:*:*:*:*:*:*
Vendors & Products Nds-association
Nds-association zserio

Tue, 28 Apr 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Ndsev
Ndsev zserio
Vendors & Products Ndsev
Ndsev zserio

Mon, 27 Apr 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 24 Apr 2026 18:30:00 +0000

Type Values Removed Values Added
Description Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. Prior to 2.18.1, a crafted payload as small as 4-5 bytes can force memory allocations of up to 16 GB, crashing any process with an OOM error (Denial of Service). This vulnerability is fixed in 2.18.1.
Title Zserio: Integer Overflow in BitStreamReader and Unbounded Memory Allocation in Deserialization
Weaknesses CWE-789
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-04-27T13:35:28.660Z

Reserved: 2026-03-20T18:05:11.829Z

Link: CVE-2026-33524

cve-icon Vulnrichment

Updated: 2026-04-27T13:20:22.417Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-24T19:17:09.850

Modified: 2026-04-28T18:33:01.667

Link: CVE-2026-33524

cve-icon Redhat

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