DEBIAN-CVE-2026-81666

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Source
https://security-tracker.debian.org/tracker/CVE-2026-81666
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-81666.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-81666
Upstream
  • CVE-2026-81666
Published
2026-09-04T10:17:13Z
Modified
2026-09-09T08:47:24Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:12 / corosync

Package

Name
corosync
Purl
pkg:deb/debian/corosync?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.7-1
3.1.7-1+deb12u1
3.1.7-1+deb12u2
3.1.8-1
3.1.8-2
3.1.8-3
3.1.9-1
3.1.9-2
3.1.10-1
3.1.10-2
3.1.10-3
3.1.10-4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-81666.json"

Debian:13 / corosync

Package

Name
corosync
Purl
pkg:deb/debian/corosync?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.9-2
3.1.9-2+deb13u1
3.1.10-1
3.1.10-2
3.1.10-3
3.1.10-4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-81666.json"

Debian:14 / corosync

Package

Name
corosync
Purl
pkg:deb/debian/corosync?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.9-2
3.1.10-1
3.1.10-2
3.1.10-3
3.1.10-4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-81666.json"