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
5.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.9Exploit: NoneExposed: 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
32.9%
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 (2.90-0ubuntu0.16.04.1+esm4) @ xenial2026-07-16ubuntu

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 9× in last 7d / 71× 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. 2026-07-24 14:17 UTCEPSS rescore
  2. 2026-07-23 14:18 UTCEPSS rescore
  3. 2026-07-23 03:05 UTCEG score recompute
  4. 2026-07-22 14:08 UTCEPSS rescore
  5. 2026-07-21 15:24 UTCEPSS rescore
  6. 2026-07-20 17:08 UTCEPSS rescore
  7. 2026-07-19 14:30 UTCEPSS rescore
  8. 2026-07-19 02:28 UTCEPSS rescore
  9. 2026-07-18 10:04 UTCEPSS rescore
  10. 2026-07-16 17:02 UTCEPSS rescore
  11. 2026-07-16 07:15 UTCVendor advisory
  12. 2026-07-16 07:15 UTCGHSA enrichment
  13. 2026-07-15 16:57 UTCEPSS rescore
  14. 2026-07-15 06:20 UTCVendor advisory
  15. 2026-07-15 06:20 UTCGHSA enrichment
  16. 2026-07-15 02:00 UTCEPSS rescore
  17. 2026-07-14 05:21 UTCVendor advisory
  18. 2026-07-14 05:21 UTCGHSA enrichment
  19. 2026-07-13 22:30 UTCEPSS rescore
  20. 2026-07-13 06:12 UTCEPSS rescore
  21. 2026-07-13 04:50 UTCVendor advisory
  22. 2026-07-13 04:50 UTCGHSA enrichment
  23. 2026-07-12 05:46 UTCEPSS rescore
  24. 2026-07-12 04:19 UTCVendor advisory
  25. 2026-07-12 04:18 UTCGHSA enrichment
Show 52 more
  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-11 03:45 UTCVendor advisory
  3. 2026-07-11 03:45 UTCGHSA enrichment
  4. 2026-07-10 03:14 UTCVendor advisory
  5. 2026-07-10 03:14 UTCGHSA enrichment
  6. 2026-07-09 19:10 UTCEPSS rescore
  7. 2026-07-09 02:42 UTCVendor advisory
  8. 2026-07-09 02:42 UTCGHSA enrichment
  9. 2026-07-08 15:15 UTCEPSS rescore
  10. 2026-07-08 15:15 UTCEPSS rescore
  11. 2026-07-08 02:11 UTCVendor advisory
  12. 2026-07-08 02:11 UTCGHSA enrichment
  13. 2026-07-07 13:46 UTCEPSS rescore
  14. 2026-07-07 01:39 UTCVendor advisory
  15. 2026-07-07 01:39 UTCGHSA enrichment
  16. 2026-07-06 16:27 UTCEPSS rescore
  17. 2026-07-06 02:23 UTCEPSS rescore
  18. 2026-07-06 01:08 UTCVendor advisory
  19. 2026-07-06 01:08 UTCGHSA enrichment
  20. 2026-07-05 02:30 UTCEPSS rescore
  21. 2026-07-05 02:30 UTCEPSS rescore
  22. 2026-07-05 00:37 UTCVendor advisory
  23. 2026-07-05 00:37 UTCGHSA enrichment
  24. 2026-07-04 06:31 UTCEPSS rescore
  25. 2026-07-04 00:06 UTCVendor advisory
  26. 2026-07-04 00:06 UTCGHSA enrichment
  27. 2026-07-02 23:32 UTCVendor advisory
  28. 2026-07-02 23:32 UTCGHSA enrichment
  29. 2026-07-01 23:00 UTCVendor advisory
  30. 2026-07-01 23:00 UTCGHSA enrichment
  31. 2026-07-01 15:06 UTCEPSS rescore
  32. 2026-07-01 15:06 UTCEPSS rescore
  33. 2026-06-30 23:22 UTCEPSS rescore
  34. 2026-06-30 22:29 UTCVendor advisory
  35. 2026-06-30 22:29 UTCGHSA enrichment
  36. 2026-06-29 21:58 UTCGHSA enrichment
  37. 2026-06-29 14:06 UTCEPSS rescore
  38. 2026-06-28 21:27 UTCGHSA enrichment
  39. 2026-06-28 14:07 UTCEPSS rescore
  40. 2026-06-28 04:56 UTCEPSS rescore
  41. 2026-06-28 04:56 UTCEPSS rescore
  42. 2026-06-27 20:55 UTCGHSA enrichment
  43. 2026-06-27 03:08 UTCEPSS rescore
  44. 2026-06-26 20:23 UTCGHSA enrichment
  45. 2026-06-25 19:53 UTCGHSA enrichment
  46. 2026-06-25 13:49 UTCEPSS rescore
  47. 2026-06-24 19:21 UTCGHSA enrichment
  48. 2026-06-24 14:05 UTCEPSS rescore
  49. 2026-06-23 21:32 UTCEPSS rescore
  50. 2026-06-23 18:23 UTCGHSA enrichment
  51. 2026-06-22 17:49 UTCEG score recompute
  52. 2026-06-22 17:45 UTCNVD updatefirst tracked

Related CVEs(same vendor + same CWE)

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 32.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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

Explore the affected products and dependency analysis for CVE-2026-12725

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