CVE-2026-12969

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-06-23. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

A fix is available — apply it.

An out-of-bounds read vulnerability exists in dnsmasq's find_soa() function in src/rfc1035.c. When parsing NS section records, extract_name() is called with extrabytes=0, failing to validate that 10 additional bytes exist for fixed-length DNS record fields. A remote attacker controlling a DNS zone can exploit this via a crafted NXDOMAIN response to cause a 10-byte heap out-of-bounds read, potentially accessing stale data from prior transactions.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

June 23, 2026

Last Modified

August 31, 2026

Advisory Details (2)

Auto-updated Jun 23, 2026
Patch available. Sources: redhat.
redhat

2491663 – (CVE-2026-12969) CVE-2026-12969 dnsmasq: dnsmasq: out-of-bounds read in find_soa() due to missing extrabytes validation

https://bugzilla.redhat.com/show_bug.cgi?id=2491663
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-12969

Vendor Advisories for CVE-2026-12969(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) @ xenial2026-08-31ubuntu

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 / 74× 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 213 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-12969?
CVE-2026-12969 is a medium vulnerability published on June 23, 2026. An out-of-bounds read vulnerability exists in dnsmasq's findsoa() function in src/rfc1035.c. When parsing NS section records, extractname() is called with extrabytes=0, failing to validate that 10 additional bytes exist for fixed-length DNS record fields. A remote attacker controlling a DNS zone…
When was CVE-2026-12969 disclosed?
CVE-2026-12969 was first published in the National Vulnerability Database on June 23, 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-2026-12969 actively exploited?
CVE-2026-12969 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 66.5% of all scored CVEs.
What is the CVSS score of CVE-2026-12969?
CVE-2026-12969 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-12969?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12969, 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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