CVE-2022-38152Public exploitNetwork attack vector

Remote server crash via stale session object

Published Aug 31, 2022 · Updated Aug 3, 2024

NULL-pointer dereference in wolfSSL before 5.5.0 allows remote attackers to crash TLS 1.3 servers during session resumption. wolfSSL_clear reuses a WOLFSSL object after FreeHandshakeResources sets ssl->arrays to NULL, and the resumed Client Hello dereferences that pointer. Exposure requires the non-default OpenSSL compatibility layer and a server that calls wolfSSL_clear; one resumed connection terminates the server process.

CVSS severity7.5
High
EPSS probability2.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL-pointer dereference in wolfSSL before 5.5.0 allows remote attackers to crash TLS 1.3 servers during session resumption. wolfSSL_clear reuses a WOLFSSL object after FreeHandshakeResources sets ssl->arrays to NULL, and the resumed Client Hello dereferences that pointer. Exposure requires the non-default OpenSSL compatibility layer and a server that calls wolfSSL_clear; one resumed connection terminates the server process.

The record

CVE
CVE-2022-38152
Published
Aug 31, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-754, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 31, 2022CVE 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 National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
T1499.004Application or System Exploitation

Public exploit references

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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