CVE-2022-46393Network attack vector

Heap corruption via DTLS CID length handling

Published Dec 15, 2022 · Updated Apr 21, 2025

Mbed TLS before 2.28.2 and 3.x before 3.3.0 allows remote attackers to corrupt heap memory via malformed DTLS Connection ID lengths. DTLS processing trusts inconsistent MBEDTLS_SSL_CID_IN_LEN_MAX and MBEDTLS_SSL_CID_OUT_LEN_MAX values when Connection IDs are enabled, causing heap overreads or overwrites. Exploitation requires a reachable DTLS endpoint built with the feature and oversized input-length configuration; malformed network traffic can crash the service or disclose or alter adjacent memory.

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

What happened

Mbed TLS before 2.28.2 and 3.x before 3.3.0 allows remote attackers to corrupt heap memory via malformed DTLS Connection ID lengths. DTLS processing trusts inconsistent MBEDTLS_SSL_CID_IN_LEN_MAX and MBEDTLS_SSL_CID_OUT_LEN_MAX values when Connection IDs are enabled, causing heap overreads or overwrites. Exploitation requires a reachable DTLS endpoint built with the feature and oversized input-length configuration; malformed network traffic can crash the service or disclose or alter adjacent memory.

The record

CVE
CVE-2022-46393
Published
Dec 15, 2022
Updated
Apr 21, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, CWE-787, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 15, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 2025Record 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

9.8NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CWE-787Out-of-bounds Write
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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