CVE-2022-3996Network attack vector

Service hang via recursive X.509 write locking

Published Dec 13, 2022 · Updated Aug 3, 2024

Improper locking in OpenSSL 3.0.0 through 3.0.7 allows remote attackers to hang policy-enabled certificate-processing services. In crypto/x509/pcy_map.c, ossl_policy_cache_set_mapping takes the certificate write lock again while its caller already holds it after malformed policy mapping processing fails. Reachability requires policy processing through the -policy option or X509_VERIFY_PARAM_set1_policies(); on affected locking implementations, especially Windows, the process hangs.

CVSS severity7.5
High
EPSS probability1.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper locking in OpenSSL 3.0.0 through 3.0.7 allows remote attackers to hang policy-enabled certificate-processing services. In crypto/x509/pcy_map.c, ossl_policy_cache_set_mapping takes the certificate write lock again while its caller already holds it after malformed policy mapping processing fails. Reachability requires policy processing through the -policy option or X509_VERIFY_PARAM_set1_policies(); on affected locking implementations, especially Windows, the process hangs.

The record

CVE
CVE-2022-3996
Published
Dec 13, 2022
Updated
Aug 3, 2024
Vendor
NetApp
Product
AltaVault OST Plug-In
Classifications
CWE-667, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 13, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NetApp · AltaVault OST Plug-Inversion=0 <*
NetApp · FAS/AFF Baseboard Management Controllerversion=0 <*
NetApp · SMI-S Providerversion=0 <*
NetApp · Management Services for Element Softwareversion=0 <*
NetApp · ONTAPversion=0 <*
OpenSSL Project · OpenSSLversion=3.0.0 <=3.0.7; version=3.0.0 <3.0.7
NetApp · NetApp HCI Baseboard Management Controllerversion=0 <*

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-667Improper Locking
T1499.004Application or System Exploitation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo