CVE-2026-42764

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Issue summary: Receiving a QUIC initial packet with an invalid token may trigger a NULL pointer dereference in the OpenSSL QUIC server with address validation disabled.

Impact summary: NULL pointer dereference typically causes abnormal termination of the affected QUIC server process and a Denial of Service.

If the address validation is disabled in the OpenSSL QUIC server implementation, an attacker can crash the server by sending an initial packet with an invalid or expired token.

By default, the client address validation is enabled in the OpenSSL QUIC server implementation, which makes the default configuration not vulnerable to this issue. However if the SSL_LISTENER_FLAG_NO_VALIDATE is used with the SSL_new_listener() call, the address validation is disabled making the vulnerable code reachable.

The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
39
EG Risk 39/100

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%
Exploitation1% × 40%
Automatability30% × 15%
EPSS PROB
0.8%
EPSS %ILE
54th
KEV
Not listed

Published

June 9, 2026

Last Modified

July 23, 2026

Advisory Details (1)

Auto-updated Jun 9, 2026
Patch available.
generic
https://openssl-library.org/news/secadv/20260609.txt

Vendor Advisories for CVE-2026-42764(18)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(8)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuopenssl-provider-legacy (3.5.5-1ubuntu3.2) @ resolute2026-09-14ubuntu
redhatrhui5/rhua-tp-rhel9:17872412602026-08-24redhat
redhatcostmanagement/costmanagement-metrics-rhel9-operator:17835391562026-07-15redhat
redhatinsights-proxy/insights-proxy-container-rhel9:17828905032026-07-01redhat
redhatdiscovery/discovery-ui-rhel9:17821669522026-06-24redhat
redhatrhui5/rhua-rhel9:17815257392026-06-16redhat
redhatopenssl-1:3.5.5-4.el9_82026-06-11redhat
redhatopenssl-1:3.5.5-4.el10_22026-06-11redhat

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

(5 across 5 ecosystems)
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
openssl—
  • 3.5.0 up to 3.5.7-r0: fixed in 3.5.7-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
openssl—
  • 3.5.0 up to 3.5.7-r0: fixed in 3.5.7-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
openssl—
  • 3.5.0 up to 3.5.7-r0: fixed in 3.5.7-r0
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
openssl3.5.1-1 ... 3.5.6-1~deb13u1 (11 versions)
  • every version up to 3.5.6-1~deb13u2: fixed in 3.5.6-1~deb13u2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
openssl3.5.1-1 ... 3.6.2-1 (22 versions)
  • every version up to 3.6.3-1: fixed in 3.6.3-1
—

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 5× in last 7d / 24× 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 359 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-42764?
CVE-2026-42764 is a high vulnerability published on June 9, 2026. Issue summary: Receiving a QUIC initial packet with an invalid token may trigger a NULL pointer dereference in the OpenSSL QUIC server with address validation disabled. Impact summary: NULL pointer dereference typically causes abnormal termination of the affected QUIC server process and a Denial of…
When was CVE-2026-42764 disclosed?
CVE-2026-42764 was first published on June 9, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42764 actively exploited?
CVE-2026-42764 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-42764?
CVE-2026-42764 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-42764?
A fix for CVE-2026-42764 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-42764 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-42764

Explore →

Is Your Infrastructure Affected by CVE-2026-42764?

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

Book a Demo →Browse All CVEs