CVE-2026-12725

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2026-06-22. a secondary CVSS source baseline 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.9Exploit: None knownExposed: 0

A fix is available — apply it.

A heap-based buffer overflow was found in dnsmasq. When DNSSEC validation and query logging are both enabled, logging of DS or DNSKEY replies containing unsupported algorithm or digest types can cause dnsmasq to write past the end of an internal logging buffer. A remote attacker able to supply such a DNS response may crash the dnsmasq process, resulting in denial of service.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
27(Track)
EG Risk 27/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity59% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

June 22, 2026

Last Modified

August 31, 2026

Advisory Details (2)

Auto-updated Jun 22, 2026
Patch available. Sources: redhat.
redhat

2490763 – (CVE-2026-12725) CVE-2026-12725 dnsmasq: dnsmasq: heap buffer overflow in log_query() when logging unsupported DS/DNSKEY replies

https://bugzilla.redhat.com/show_bug.cgi?id=2490763
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-12725

Vendor Advisories for CVE-2026-12725(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 / EcosystemFixed in / PatchReleasedSource
ubuntudnsmasq-utils (2.90-0ubuntu0.20.04.1+esm3) @ focal2026-09-18ubuntu

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
dnsmasq2.85-1 ... 2.93-1 (31 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
dnsmasq2.89-1 ... 2.93-1 (23 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
dnsmasq2.91-1 ... 2.93-1 (12 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
dnsmasq2.91-1 ... 2.92~rc3-1 (10 versions)2.93-1—

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 6× in last 7d / 50× 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 228 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Same vendor

1 shown

ubuntu:USN-8542-1

Frequently asked(5)

What is CVE-2026-12725?
CVE-2026-12725 is a medium vulnerability published on June 22, 2026. A heap-based buffer overflow was found in dnsmasq. When DNSSEC validation and query logging are both enabled, logging of DS or DNSKEY replies containing unsupported algorithm or digest types can cause dnsmasq to write past the end of an internal logging buffer. A remote attacker able to supply such…
When was CVE-2026-12725 disclosed?
CVE-2026-12725 was first published in the National Vulnerability Database on June 22, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12725 actively exploited?
CVE-2026-12725 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.4% of all scored CVEs.
What is the CVSS score of CVE-2026-12725?
CVE-2026-12725 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-12725?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12725, 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-12725

Explore →

Is Your Infrastructure Affected by CVE-2026-12725?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs