CVE-2026-75029

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

Score 5.3 from GitHub Security Advisory (severity: MODERATE) published 2026-09-16. A secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-80786 (ENISA EUVD) · GHSA-crh2-6h8j-h25c (GitHub Security Advisories)Source: ENISA EUVD

5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In a query response, an attacker may send named multiple copies of a record that should only exist once (such as an SOA record). If the RDATA is the same on all the copies, the record is appended to the in-memory RDATA set, which can cause increased memory usage of the negative cache and possibly lead to other memory attack vectors. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100

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)
Severity53% × 45%
Impact severity (EG Severity): CVSS 5.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 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
0.5%
EPSS %ILE
41st
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 (5.3): severity, escalated by confirmed exploitation. This CVE's 5.3 is its impact severity (EG Severity), not escalated.

EG Severity
5.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-07). 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 16, 2026

Last Modified

October 26, 2026

Advisory Details (3)

Auto-updated Sep 16, 2026
Patch available.
Web page

Index of /isc/bind9/9.21.26

https://downloads.isc.org/isc/bind9/9.21.26
Web page

Index of /isc/bind9/9.20.29

https://downloads.isc.org/isc/bind9/9.20.29
Web page

CVE-2026-75029: Message parser retains every identical singleton RDATA, enabling wire-to-work amplification

https://kb.isc.org/docs/cve-2026-75029

Vendor Advisories for CVE-2026-75029(2)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulwresd (1:9.10.3.dfsg.P4-8ubuntu1.19+esm11) @ xenial2026-10-16ubuntu
redhatbind-main-9.20.29-0.1.hum12026-09-16redhat

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

(6 across 6 ecosystems)
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
bind—
  • every version up to 9.20.29-r0: fixed in 9.20.29-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
bind—
  • every version up to 9.20.29-r0: fixed in 9.20.29-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
bind—
  • every version up to 9.20.29-r0: fixed in 9.20.29-r0
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
bind91:9.18.12-1 ... 1:9.18.49-1~deb12u2 (17 versions)
  • every version up to 1:9.18.49-1~deb12u3: fixed in 1:9.18.49-1~deb12u3
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
bind91:9.20.11-4 ... 1:9.20.27-2 (25 versions)
  • every version up to 1:9.20.29-1~deb13u1: fixed in 1:9.20.29-1~deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
bind91:9.20.11-4 ... 1:9.20.29-1~deb13u1 (26 versions)
  • every version up to 1:9.20.29-1: fixed in 1:9.20.29-1
—

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 8× in last 7d / 35× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 148 rows 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 48 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:57 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  2. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  3. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  4. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  5. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  6. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  7. 2026-11-07 19:21 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub severity MODERATE · GitHub CVSS 5.3
  8. 2026-11-07 19:21 UTCEchelonGraph re-scored
  9. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  10. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  11. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  12. 2026-11-04 16:36 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  13. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  14. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  15. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  16. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  17. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  18. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  19. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  20. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  21. 2026-10-26 23:27 UTCEchelonGraph re-scored
  22. 2026-10-26 23:27 UTCVendor advisory
  23. 2026-10-26 23:26 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  24. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  25. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
Show 75 more
  1. 2026-10-25 14:03 UTCEchelonGraph re-scored
  2. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  4. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  5. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  6. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  7. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  8. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  9. 2026-10-18 03:13 UTCEchelonGraph re-scored
  10. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  11. 2026-10-16 18:20 UTCEchelonGraph re-scored
  12. 2026-10-16 18:20 UTCVendor advisory
  13. 2026-10-16 18:20 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  14. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  15. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  16. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  17. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  18. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  19. 2026-10-12 15:39 UTCEchelonGraph re-scored
  20. 2026-10-11 19:25 UTCEchelonGraph re-scored
  21. 2026-10-11 16:41 UTCEchelonGraph re-scored
  22. 2026-10-11 14:00 UTCEchelonGraph re-scored
  23. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  24. 2026-10-11 05:57 UTCEchelonGraph re-scored
  25. 2026-10-11 05:57 UTCVendor advisory
  26. 2026-10-11 05:57 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  27. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  28. 2026-10-10 07:41 UTCEchelonGraph re-scored
  29. 2026-10-10 07:41 UTCVendor advisory
  30. 2026-10-10 07:41 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  31. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  32. 2026-10-09 09:24 UTCEchelonGraph re-scored
  33. 2026-10-09 09:24 UTCVendor advisory
  34. 2026-10-09 09:24 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  35. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  36. 2026-10-08 11:07 UTCEchelonGraph re-scored
  37. 2026-10-08 11:07 UTCVendor advisory
  38. 2026-10-08 11:07 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  39. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  40. 2026-10-07 12:50 UTCEchelonGraph re-scored
  41. 2026-10-07 12:50 UTCVendor advisory
  42. 2026-10-07 12:50 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  43. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  44. 2026-10-06 14:25 UTCEchelonGraph re-scored
  45. 2026-10-06 14:25 UTCVendor advisory
  46. 2026-10-06 14:25 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  47. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  48. 2026-10-05 16:03 UTCEchelonGraph re-scored
  49. 2026-10-05 16:03 UTCVendor advisory
  50. 2026-10-05 16:03 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  51. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  52. 2026-10-04 17:14 UTCVendor advisory
  53. 2026-10-04 17:14 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  54. 2026-10-03 18:50 UTCEchelonGraph re-scored
  55. 2026-10-03 18:50 UTCVendor advisory
  56. 2026-10-03 18:50 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  57. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  58. 2026-10-02 19:51 UTCEchelonGraph re-scored
  59. 2026-10-02 19:51 UTCVendor advisory
  60. 2026-10-02 19:51 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  61. 2026-10-01 21:35 UTCEchelonGraph re-scored
  62. 2026-10-01 21:35 UTCVendor advisory
  63. 2026-10-01 21:35 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  64. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  65. 2026-09-30 23:17 UTCEchelonGraph re-scored
  66. 2026-09-30 23:17 UTCVendor advisory
  67. 2026-09-30 23:17 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  68. 2026-09-30 00:53 UTCEchelonGraph re-scored
  69. 2026-09-30 00:53 UTCVendor advisory
  70. 2026-09-30 00:53 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  71. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  72. 2026-09-28 22:54 UTCEchelonGraph re-scored
  73. 2026-09-28 22:54 UTCVendor advisory
  74. 2026-09-28 22:54 UTCGHSA enrichmentGHSA-crh2-6h8j-h25c · GitHub CVSS 5.3
  75. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.7% · 51st percentile

Frequently asked(5)

What is CVE-2026-75029?
CVE-2026-75029 is a medium-severity vulnerability; its CVE record was published on September 16, 2026. In a query response, an attacker may send named multiple copies of a record that should only exist once (such as an SOA record). If the RDATA is the same on all the copies, the record is appended to the in-memory RDATA set, which can cause increased memory usage of the negative cache and possibly…
When was CVE-2026-75029 made public?
CVE-2026-75029 was made public on September 16, 2026: that is the date its CVE record's CNA, Internet Systems Consortium (ISC), gives for when the vulnerability was made public. The CVE record itself was published on September 16, 2026. EchelonGraph's copy of the record carries a last-modified date of October 26, 2026; the record at its source may have been updated since.
Is CVE-2026-75029 actively exploited?
CVE-2026-75029 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-75029?
CVE-2026-75029 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-75029?
A fix for CVE-2026-75029 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-75029 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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