CVE-2026-102253

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-29. The CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 4 sources updated this week

Also known asEUVD-2026-89415 (ENISA EUVD) · GHSA-jhpr-vprv-wh8f (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

iperf3 versions prior to 3.22 contains a denial of service vulnerability that allows unauthenticated remote attackers to crash-loop the server's UDP receive worker into an unrecoverable infinite loop by sending a single crafted control-channel parameter message followed by one 16-byte UDP datagram. Attackers can permanently pin the affected per-stream receive thread at approximately 100% CPU usage, rendering the server unusable until forcibly killed with SIGKILL, as the process does not respond to normal control-channel closure.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
37th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 29, 2026

Last Modified

October 1, 2026

Advisory Details (3)

Auto-updated Sep 29, 2026
Patch available. Sources: github_release.
Web page

iperf3 < 3.22 UDP Receive Worker Infinite Loop DoS | Advisories | VulnCheck

https://www.vulncheck.com/advisories/iperf3-udp-receive-worker-infinite-loop-dos
Web page

iperf/RELNOTES.md at master · esnet/iperf · GitHub

https://github.com/esnet/iperf/blob/master/RELNOTES.md
GitHub release Patch Available

iperf-3.22

Patch available: esnet/iperf 3.22

https://github.com/esnet/iperf/releases/tag/3.22

Vendor Advisories for CVE-2026-102253(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatiperf3-0:3.17.1-6.el10_2.22026-10-22redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
iperf33.18-2 ... 3.22-0.1 (9 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
iperf33.18-2 ... 3.20-2.1 (6 versions)
  • every version up to 3.22-0.1: fixed in 3.22-0.1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 10× in last 7d / 83× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 109 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 9 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  2. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  3. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  4. 2026-10-29 21:35 UTCEG score recompute
  5. 2026-10-29 21:35 UTCVendor advisory
  6. 2026-10-29 21:35 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  7. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  8. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  9. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  10. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  11. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  12. 2026-10-25 14:56 UTCEG score recompute
  13. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  14. 2026-10-24 10:00 UTCEG score recompute
  15. 2026-10-24 10:00 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  16. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  17. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  18. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  19. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  20. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  21. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  22. 2026-10-18 05:10 UTCEG score recompute
  23. 2026-10-17 19:52 UTCEG score recompute
  24. 2026-10-17 19:52 UTCVendor advisory
  25. 2026-10-17 19:51 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
Show 75 more
  1. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  2. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  3. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  4. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  5. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  6. 2026-10-12 16:41 UTCEG score recompute
  7. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  8. 2026-10-11 21:08 UTCVendor advisory
  9. 2026-10-11 21:08 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  10. 2026-10-11 20:16 UTCEG score recompute
  11. 2026-10-11 18:28 UTCEG score recompute
  12. 2026-10-11 15:02 UTCEG score recompute
  13. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  14. 2026-10-11 08:17 UTCEG score recompute
  15. 2026-10-11 08:17 UTCVendor advisory
  16. 2026-10-11 08:16 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  17. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  18. 2026-10-10 19:24 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  19. 2026-10-10 06:28 UTCEG score recompute
  20. 2026-10-10 06:28 UTCVendor advisory
  21. 2026-10-10 06:27 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  22. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  23. 2026-10-09 17:37 UTCVendor advisory
  24. 2026-10-09 17:37 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  25. 2026-10-09 04:46 UTCEG score recompute
  26. 2026-10-09 04:46 UTCVendor advisory
  27. 2026-10-09 04:46 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  28. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  29. 2026-10-08 15:54 UTCVendor advisory
  30. 2026-10-08 15:54 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  31. 2026-10-08 01:47 UTCEG score recompute
  32. 2026-10-08 01:47 UTCVendor advisory
  33. 2026-10-08 01:47 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  34. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  35. 2026-10-07 12:56 UTCVendor advisory
  36. 2026-10-07 12:56 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  37. 2026-10-07 00:05 UTCEG score recompute
  38. 2026-10-07 00:05 UTCVendor advisory
  39. 2026-10-07 00:05 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  40. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  41. 2026-10-06 11:14 UTCVendor advisory
  42. 2026-10-06 11:14 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  43. 2026-10-05 22:23 UTCEG score recompute
  44. 2026-10-05 22:23 UTCVendor advisory
  45. 2026-10-05 22:23 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  46. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  47. 2026-10-05 09:26 UTCEG score recompute
  48. 2026-10-05 09:26 UTCVendor advisory
  49. 2026-10-05 09:26 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  50. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  51. 2026-10-04 20:35 UTCVendor advisory
  52. 2026-10-04 20:35 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  53. 2026-10-04 07:44 UTCVendor advisory
  54. 2026-10-04 07:44 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  55. 2026-10-03 18:53 UTCEG score recompute
  56. 2026-10-03 18:53 UTCVendor advisory
  57. 2026-10-03 18:53 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  58. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  59. 2026-10-03 06:02 UTCVendor advisory
  60. 2026-10-03 06:02 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  61. 2026-10-02 17:11 UTCEG score recompute
  62. 2026-10-02 17:11 UTCVendor advisory
  63. 2026-10-02 17:10 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  64. 2026-10-02 04:19 UTCEG score recompute
  65. 2026-10-02 04:19 UTCVendor advisory
  66. 2026-10-02 04:19 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  67. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  68. 2026-10-01 15:26 UTCEG score recompute
  69. 2026-10-01 15:26 UTCVendor advisory
  70. 2026-10-01 15:26 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  71. 2026-10-01 09:14 UTCVendor advisory
  72. 2026-10-01 09:14 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  73. 2026-09-30 20:23 UTCEG score recompute
  74. 2026-09-30 20:23 UTCGHSA enrichmentGHSA-jhpr-vprv-wh8f · GitHub severity HIGH · GitHub CVSS 7.5
  75. 2026-09-30 19:36 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-102253?
CVE-2026-102253 is a high-severity vulnerability; its CVE record was published on September 29, 2026. iperf3 versions prior to 3.22 contains a denial of service vulnerability that allows unauthenticated remote attackers to crash-loop the server's UDP receive worker into an unrecoverable infinite loop by sending a single crafted control-channel parameter message followed by one 16-byte UDP datagram.…
When was CVE-2026-102253 made public?
CVE-2026-102253 was made public on September 29, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on September 29, 2026. EchelonGraph's copy of the record carries a last-modified date of October 1, 2026; the record at its source may have been updated since.
Is CVE-2026-102253 actively exploited?
CVE-2026-102253 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-102253?
CVE-2026-102253 has a CVSS base score of 7.5 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-102253?
A fix for CVE-2026-102253 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-102253 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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