CVE-2026-35092

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-04-01. the CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:redhat, epss, ghsa
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 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
59.0%
KEV
Not listed

Published

April 1, 2026

Last Modified

May 29, 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 (3.1.9-2ubuntu1.1) @ questing2026-06-11ubuntu
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-0:3.1.7-1.el8_8.12026-05-06redhat
redhatcorosync-0:3.1.9-1.el10_0.22026-05-06redhat
redhatcorosync-0:3.1.5-3.el9_0.12026-05-06redhat
redhatcorosync-0:3.1.7-1.el9_2.12026-05-06redhat
redhatcorosync-0:3.1.9-2.el9_6.12026-05-06redhat
redhatcorosync-0:3.1.8-1.el9_4.12026-05-06redhat
redhatcorosync-0:3.1.0-3.el8_4.22026-05-06redhat
redhatcorosync-0:3.1.5-2.el8_6.12026-05-06redhat
redhatcorosync-0:3.1.9-2.el10_1.12026-05-05redhat
redhatcorosync-0:3.1.8-1.el8_10.12026-05-05redhat
redhatcorosync-0:3.1.9-2.el9_7.12026-05-05redhat

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.

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 / 38× 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 111 total refreshes for this CVE.

  1. 2026-07-23 03:10 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
  4. 2026-07-20 17:08 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
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  1. 2026-07-01 15:06 UTCEPSS rescore
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  28. 2026-06-12 23:12 UTCEPSS rescore
  29. 2026-06-12 23:12 UTCEPSS rescore
  30. 2026-06-11 22:26 UTCVendor advisory
  31. 2026-06-11 22:26 UTCGHSA enrichment
  32. 2026-06-11 14:00 UTCEPSS rescore
  33. 2026-06-10 22:18 UTCEPSS rescore
  34. 2026-06-10 17:24 UTCVendor advisory
  35. 2026-06-10 17:24 UTCGHSA enrichment
  36. 2026-06-10 13:22 UTCEPSS rescore
  37. 2026-06-10 04:05 UTCVendor advisory
  38. 2026-06-10 04:05 UTCGHSA enrichment
  39. 2026-06-09 14:54 UTCVendor advisory
  40. 2026-06-09 14:54 UTCGHSA enrichment
  41. 2026-06-08 14:17 UTCEPSS rescore
  42. 2026-06-08 14:17 UTCEPSS rescore
  43. 2026-06-08 13:55 UTCVendor advisory
  44. 2026-06-08 13:55 UTCGHSA enrichment
  45. 2026-06-08 00:41 UTCVendor advisory
  46. 2026-06-08 00:41 UTCGHSA enrichment
  47. 2026-06-07 15:25 UTCEPSS rescore
  48. 2026-06-07 15:25 UTCEPSS rescore
  49. 2026-06-07 15:25 UTCEPSS rescore
  50. 2026-06-07 11:19 UTCVendor advisory
  51. 2026-06-07 11:19 UTCGHSA enrichment
  52. 2026-06-06 13:47 UTCEPSS rescore
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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 May 29, 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 59.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-35092?
CVE-2026-35092 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending).
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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