CVE-2026-6507

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-04-17. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in dnsmasq. A remote attacker could exploit an out-of-bounds write vulnerability by sending a specially crafted BOOTREPLY (Bootstrap Protocol Reply) packet to a dnsmasq server configured with the --dhcp-split-relay option. This can lead to memory corruption, causing the dnsmasq daemon to crash and resulting in a denial of service (DoS).

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

April 17, 2026

Last Modified

September 1, 2026

Advisory Details (2)

Auto-updated Jun 11, 2026
Patch available. Sources: redhat.
redhat Patch Available

2459181 – (CVE-2026-6507) CVE-2026-6507 dnsmasq: dnsmasq: Denial of Service due to out-of-bounds write in DHCP BOOTREPLY processing

https://bugzilla.redhat.com/show_bug.cgi?id=2459181
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-6507

Vendor Advisories for CVE-2026-6507(1)

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 (2.92-1ubuntu0.3) @ resolute2026-08-26ubuntu

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.

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
dnsmasq2.91-1 ... 2.92~rc3-1 (8 versions)2.92-4—

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 4× in last 7d / 36× 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 229 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-6507?
CVE-2026-6507 is a high vulnerability published on April 17, 2026. A flaw was found in dnsmasq. A remote attacker could exploit an out-of-bounds write vulnerability by sending a specially crafted BOOTREPLY (Bootstrap Protocol Reply) packet to a dnsmasq server configured with the --dhcp-split-relay option. This can lead to memory corruption, causing the dnsmasq…
When was CVE-2026-6507 disclosed?
CVE-2026-6507 was first published in the National Vulnerability Database on April 17, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6507 actively exploited?
CVE-2026-6507 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 59.8% of all scored CVEs.
What is the CVSS score of CVE-2026-6507?
CVE-2026-6507 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-6507?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6507, 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-2026-6507

Explore →

Is Your Infrastructure Affected by CVE-2026-6507?

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

Start Free Scan →Browse All CVEs