CVE-2026-5172

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.3 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 54% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.3Exploit: NoneExposed: 0

A fix is available — apply it.

A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.

CVSS v3
7.3
EG Score
7.3(medium)
EPSS
56.7%
KEV
Not listed

Published

May 11, 2026

Last Modified

July 15, 2026

Advisory Details (6)

Auto-updated Jun 9, 2026
Patch available. Sources: github_pr, github_release, cert.
cert

VU#471747 - dnsmasq contains several vulnerabilities, including attacker DNS redirect, privilege escalation, and heap manipulation

https://www.kb.cert.org/vuls/id/471747
generic

Index of /dnsmasq/CVE

https://thekelleys.org.uk/dnsmasq/CVE/
generic

[Dnsmasq-discuss] Security - IMPORTANT

https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html
github_release Patch Available

Pi-hole FTL v6.6.2

Patch available: pi-hole/FTL v6.6.2

https://github.com/pi-hole/FTL/releases/tag/v6.6.2
github_pr

[Backport release-25.11] dnsmasq: 2.92 -> 2.92rel2

Fix merged in NixOS/nixpkgs PR #519093 on 2026-05-11 — awaiting tagged release

https://github.com/NixOS/nixpkgs/pull/519093
github_pr

dnsmasq: 2.92 -> 2.92rel2

Fix merged in NixOS/nixpkgs PR #519082 on 2026-05-11 — awaiting tagged release

https://github.com/NixOS/nixpkgs/pull/519082

Vendor Advisories for CVE-2026-5172(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 / EcosystemFixed in / PatchReleasedSource
ubuntudnsmasq-utils (2.90-0ubuntu0.22.04.3) @ jammy2026-06-28ubuntu
redhatdnsmasq-0:2.90-7.el10_22026-05-19redhat

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.

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

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 12× in last 7d / 64× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 190 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-5172?
CVE-2026-5172 is a high vulnerability published on May 11, 2026. A buffer overflow in dnsmasq’s extractaddresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extractname() to advance the pointer past the record’s end.
When was CVE-2026-5172 disclosed?
CVE-2026-5172 was first published in the National Vulnerability Database on May 11, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5172 actively exploited?
CVE-2026-5172 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 56.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-5172?
CVE-2026-5172 has a CVSS v3.1 base score of 7.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-5172?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5172, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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