CVE-2026-35092

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-04-01. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in Corosync. An integer overflow vulnerability in Corosync's join message sanity validation allows a remote, unauthenticated attacker to send crafted User Datagram Protocol (UDP) packets. This can cause the service to crash, leading to a denial of service. This vulnerability specifically affects Corosync deployments configured to use totemudp/totemudpu mode.

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%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
61%
KEV
Not listed

Published

April 1, 2026

Last Modified

August 21, 2026

Advisory Details (5)

Auto-updated May 5, 2026
Patch available. Sources: redhat.
redhat Patch Available

2453814 – (CVE-2026-35092) CVE-2026-35092 corosync: Corosync: Denial of Service via integer overflow in join message validation

Affected: Red Hat Enterprise Linux 10

https://bugzilla.redhat.com/show_bug.cgi?id=2453814
redhat Patch Available

2453169 – corosync: pre-auth OOB read in check_memb_commit_token_sanity + integer overflow in check_memb_join_sanity

https://bugzilla.redhat.com/show_bug.cgi?id=2453169
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-35092
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2026:13657
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2026:13644

Vendor Advisories for CVE-2026-35092(15)

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

Patch Availability(15)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibvotequorum8 (3.1.7-1ubuntu3.2) @ noble2026-08-21ubuntu
redhatcorosync-0:2.4.5-7.el7_9.32026-05-26redhat
redhatcorosync-0:3.1.10-1.el10_2.12026-05-19redhat
redhatcorosync-0:3.1.10-1.el9_8.12026-05-19redhat
redhatcorosync-0:3.1.9-2.el9_6.12026-05-06redhat
redhatcorosync-0:3.1.0-3.el8_4.22026-05-06redhat
redhatcorosync-0:3.1.9-1.el10_0.22026-05-06redhat
redhatcorosync-0:3.1.7-1.el8_8.12026-05-06redhat
redhatcorosync-0:3.1.5-3.el9_0.12026-05-06redhat
redhatcorosync-0:3.1.7-1.el9_2.12026-05-06redhat
redhatcorosync-0:3.1.8-1.el9_4.12026-05-06redhat
redhatcorosync-0:3.1.5-2.el8_6.12026-05-06redhat
redhatcorosync-0:3.1.9-2.el9_7.12026-05-05redhat
redhatcorosync-0:3.1.9-2.el10_1.12026-05-05redhat
redhatcorosync-0:3.1.8-1.el8_10.12026-05-05redhat

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
corosync3.1.2-2, 3.1.2-2+deb11u13.1.2-2+deb11u2—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
corosync3.1.7-1, 3.1.7-1+deb12u13.1.7-1+deb12u2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
corosync3.1.9-23.1.9-2+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
corosync3.1.10-1, 3.1.9-23.1.10-2—

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 8× in last 7d / 33× 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 216 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-35092?
CVE-2026-35092 is a high vulnerability published on April 1, 2026. A flaw was found in Corosync. An integer overflow vulnerability in Corosync's join message sanity validation allows a remote, unauthenticated attacker to send crafted User Datagram Protocol (UDP) packets. This can cause the service to crash, leading to a denial of service. This vulnerability…
When was CVE-2026-35092 disclosed?
CVE-2026-35092 was first published in the National Vulnerability Database on April 1, 2026, with the most recent update on August 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-35092 actively exploited?
CVE-2026-35092 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 38.9% of all scored CVEs.
What is the CVSS score of CVE-2026-35092?
CVE-2026-35092 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-35092?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-35092, 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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