CVE-2022-44793Public exploitNetwork attack vector

Remote snmpd crash via NULL SNMP varbind

Published Nov 7, 2022 · Updated May 5, 2025

NULL pointer dereference in Net-SNMP 5.4.3 through 5.9.3 allows remote attackers to crash snmpd with a crafted UDP SNMP SET packet. The handle_ipv6IpForwarding function dereferences requests->requestvb->val.integer when the ipv6IpForwarding varbind has an ASN_NULL value, causing a segmentation fault. The target must expose SNMP SET processing for the IPv6-MIB object; exploitation interrupts the daemon without reported data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability53.46%
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 Net-SNMP 5.4.3 through 5.9.3 allows remote attackers to crash snmpd with a crafted UDP SNMP SET packet. The handle_ipv6IpForwarding function dereferences requests->requestvb->val.integer when the ipv6IpForwarding varbind has an ASN_NULL value, causing a segmentation fault. The target must expose SNMP SET processing for the IPv6-MIB object; exploitation interrupts the daemon without reported data disclosure or modification.

The record

CVE
CVE-2022-44793
Published
Nov 7, 2022
Updated
May 5, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 7, 2022CVE publishedPublication date reported by the CVE source.
  2. May 5, 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

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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-476NULL Pointer Dereference
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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