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: 0%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
31(Track)
EG Risk 31/100SSVC: 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%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

June 22, 2026

Last Modified

July 8, 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 (2.90-0ubuntu0.22.04.4) @ jammy2026-07-26ubuntu

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

(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 18× in last 7d / 76× 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.

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

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 July 8, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 67.0% 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

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