CVE-2022-44793: handle_ipv6IpForwarding in agent/mibgroup/ip-mib/ip_scalars.c in Net-SNMP 5.4.3 through 5.9.3 has a NULL Point

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MEDIUM 6.5WATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2022-44793 is a medium-severity flaw (CVSS 6.5) affecting net-snmp, debian linux, h300s firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

handle_ipv6IpForwarding in agent/mibgroup/ip-mib/ip_scalars.c in Net-SNMP 5.4.3 through 5.9.3 has a NULL Pointer Exception bug that can be used by a remote attacker to cause the instance to crash via a crafted UDP packet, resulting in Denial of Service.

Why this priority

EPSS top 1%: very likely to be exploited
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	53.5% (top 1%)
CISA exploited list	No
Weakness	CWE-476
Published	2022-11-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: debian · net-snmp · netapp

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-11-07 03:15 UTCPublished CVE record published
2026-06-17 05:08 UTCUpdated Record last modified

net-snmp net-snmp UPGRADE

Affected: >= 5.4.3 and <= 5.9.3

Fixed in: newer than 5.9.3

Safe to downgrade to: a release before 5.4.3

1. Check installed version

apt-cache policy net-snmp || rpm -q net-snmp || net-snmp --version

2. UPGRADE to newer than 5.9.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade net-snmp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade net-snmp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 5.4.3 (Debian / Ubuntu)

apt-cache madison net-snmp sudo apt install net-snmp=<VERSION_BEFORE_5.4.3> sudo apt-mark hold net-snmp

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list net-snmp sudo dnf downgrade net-snmp-<VERSION_BEFORE_5.4.3> sudo dnf versionlock add net-snmp

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

debian debian linux MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netapp h300s firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netapp h500s firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netapp h700s firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netapp h410s firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-44793?

net-snmp: upgrade to newer than 5.9.3; debian linux: mitigate or apply the listed mitigation; h300s firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-44793 being exploited?

CVE-2022-44793 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-44793 affect?

CVE-2022-44793 affects net-snmp, debian linux, h300s firmware. Severity is medium (CVSS 6.5). handle_ipv6IpForwarding in agent/mibgroup/ip-mib/ip_scalars.c in Net-SNMP 5.4.3 through 5.9.3 has a NULL Pointer Exception bug that can be used by a remote attacker to cause the instance to crash via a crafted UDP packet, resulting in Denia

How urgent is CVE-2022-44793?

Priority 57/100. EPSS top 1%: very likely to be exploited; Public exploit reference; On your watchlist

Software pages

Debian vulnerabilities

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References

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