CVE-2021-28033Network attack vector

Memory corruption via panic during array deserialization

Published Mar 5, 2021 · Updated Aug 3, 2024

Memory corruption in byte_struct before 0.6.1 allows attackers to trigger invalid object drops through panicking array deserialization. The read_bytes_default_le implementation allocates [T; n] with std::mem::uninitialized, then calls each T deserializer and drops invalid elements if one panics. Reachability depends on a consuming application invoking this array path with data and a T implementation that can panic, after which memory safety is violated.

CVSS severity9.8
Critical
EPSS probability1.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in byte_struct before 0.6.1 allows attackers to trigger invalid object drops through panicking array deserialization. The read_bytes_default_le implementation allocates [T; n] with std::mem::uninitialized, then calls each T deserializer and drops invalid elements if one panics. Reachability depends on a consuming application invoking this array path with data and a T implementation that can panic, after which memory safety is violated.

The record

CVE
CVE-2021-28033
Published
Mar 5, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-908
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 5, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-908Use of Uninitialized Resource

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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