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CVE-2023-7250· NVD / CVE Program· CNA redhat

Iperf3: possible denial of service

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.93% (FIRST EPSS); higher than 59.6% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: iperf3 (AlmaLinux:8) 3.5-10.el8_10; iperf3 (AlmaLinux:9) 3.9-13.el9; iperf3 (Debian:11) 3.9-1+deb11u2.

Low priority for now. Upgrade to iperf3 (AlmaLinux:8) 3.5-10.el8_10; iperf3 (AlmaLinux:9) 3.9-13.el9; iperf3 (Debian:11) 3.9-1+deb11u2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

A flaw was found in iperf, a utility for testing network performance using TCP, UDP, and SCTP. A malicious or malfunctioning client can send less than the expected amount of data to the iperf server, which can cause the server to hang indefinitely waiting for the remainder or until the connection gets closed. This will prevent other connections to the server, leading to a denial of service.

MediumCVSS 5.3 · v3.1—No exploit Fix available
Published
Mar 18, 2024
Updated
Jun 17, 2026
EPSS
0.9% · 60th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.9%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
5.3
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-7250

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
esiperf3
redhatenterprise linux
redhatenterprise linux for arm 64
redhatenterprise linux for ibm z systems
redhatenterprise linux for power little endian

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • es iperf3before 3.15
  • redhat enterprise linux8.0
  • redhat enterprise linux9.0
  • redhat enterprise linux for arm 648.0_aarch64
  • redhat enterprise linux for arm 649.0_aarch64
  • redhat enterprise linux for ibm z systems8.0_s390x
  • redhat enterprise linux for ibm z systems9.0_s390x
  • redhat enterprise linux for power little endian8.0_ppc64le

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat Enterprise Linux 7

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 8

    • 0:3.5-10.el8_10 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 9

    • 0:3.9-13.el9 and laternot affected · rpm

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8iperf3before 3.5-10.el8_103.5-10.el8_10
AlmaLinux:9iperf3before 3.9-13.el93.9-13.el9
Debian:11iperf3before 3.9-1+deb11u23.9-1+deb11u2
Debian:12iperf3all versions—
Debian:13iperf3before 3.15-13.15-1
Red Hat:enterprise_linux:8::appstreamiperf3before 0:3.5-10.el8_100:3.5-10.el8_10
Red Hat:enterprise_linux:8::appstreamiperf3-debuginfobefore 0:3.5-10.el8_100:3.5-10.el8_10
Red Hat:enterprise_linux:8::appstreamiperf3-debugsourcebefore 0:3.5-10.el8_100:3.5-10.el8_10
Red Hat:enterprise_linux:9::appstreamiperf3before 0:3.9-13.el90:3.9-13.el9
Red Hat:enterprise_linux:9::appstreamiperf3-debuginfobefore 0:3.9-13.el90:3.9-13.el9
Red Hat:enterprise_linux:9::appstreamiperf3-debugsourcebefore 0:3.9-13.el90:3.9-13.el9
Rocky Linux:8iperf3before 0:3.5-10.el8_100:3.5-10.el8_10
Rocky Linux:9iperf3before 0:3.9-13.el9_5.10:3.9-13.el9_5.1

Same product

es: all records

Other highest-scoring records for the same primary product.

  • CVE-2016-4303The parse_string function in cjson.c in the cJSON library mishandles UTF8/16 strings, which allows remote attackers to cause a denial of ser
    41Plan
  • CVE-2025-54351In iperf before 3.19.1, net.c has a buffer overflow when --skip-rx-copy is used (for MSG_TRUNC in recv).
    40Plan
  • CVE-2025-54349In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
    40Plan
  • CVE-2023-38403iperf3 before 3.14 allows peers to cause an integer overflow and heap corruption via a crafted length field.
    31Monitor
  • CVE-2024-53580iperf v3.17.1 was discovered to contain a segmentation violation via the iperf_exchange_parameters() function.
    30Monitor
  • CVE-2024-26306iPerf3 before 3.17, when used with OpenSSL before 3.2.0 as a server with RSA authentication, allows a timing side channel in RSA decryption
    23Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:iperf33.5-10.el8_10 · AlmaLinux:8Package registry (OSV)
debian:iperf33.15-1 · Debian:13Package registry (OSV)
red hat:iperf30:3.5-10.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:iperf3-debuginfo0:3.5-10.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:iperf3-debugsource0:3.5-10.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
rocky linux:iperf30:3.5-10.el8_10 · Rocky Linux:8Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
Low

Weakness class (CWE)

CWE-183 · Permissive List of Allowed Inputs

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records