BaselineWatch
Desk
Your fleet and your work Fleetyour releases and the hardware they run onTriagewhat needs a decisionWatchlistthe products and platforms you runSaved searchesthe lists you come back to
This instance Sourceswhat is read, how often, under what termsDigestthe daily or weekly summary, and alerts
How it is drawn Appearancethe look and the colour schemeBrandingthe mark this instance wears
Owner sign-in

CVE-2026-81666

6.5 medium SSVC exploitation: none Published
NVD · CVE.org

An integer overflow was found in Corosync's handling of membership commit token messages. The length-validation check for these messages can be bypassed on 32-bit systems due to an integer overflow in the calculation of the expected message length, allowing a crafted network packet to trigger an out-of-bounds memory access that crashes the Corosync daemon. This results in a denial of service for the affected cluster node. The overflow does not occur on 64-bit systems, where the length calculation is correctly performed in 64-bit arithmetic.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 5

  1. StatusAwaiting Analysis → PublishedNVD modified 2026-10-21 20:06
  2. StatusPublished → Awaiting AnalysisNVD modified 2026-10-21 21:19
  3. StatusAwaiting Analysis → PublishedNVD modified 2026-10-21 17:53
  4. StatusPublished → Awaiting AnalysisNVD modified 2026-10-21 18:17
  5. First seenCVSS 6.5 · red hatNVD modified 2026-10-21 17:53

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 2