CVE-2021-45687

Memory corruption via unchecked deserialized CPU data

Published Dec 26, 2021 · Updated Aug 4, 2024

Memory corruption in raw-cpuid before 9.1.1 allows attackers to trigger undefined behavior or a panic through deserialized data. With the non-default serialize feature enabled, Deserialize accepts arbitrary VendorInfo content, and as_string() passes invalid UTF-8 to str::from_utf8_unchecked(). Crafted values can therefore violate internal invariants and cause undefined behavior or assertion-driven process termination.

CVSS severity9.8
Critical
EPSS probability1.12%
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 raw-cpuid before 9.1.1 allows attackers to trigger undefined behavior or a panic through deserialized data. With the non-default serialize feature enabled, Deserialize accepts arbitrary VendorInfo content, and as_string() passes invalid UTF-8 to str::from_utf8_unchecked(). Crafted values can therefore violate internal invariants and cause undefined behavior or assertion-driven process termination.

The record

CVE
CVE-2021-45687
Published
Dec 26, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1499
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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 vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8NIST NVDAV:N/AC:M/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

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint Denial of Service

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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