CVE-2026-35091
HIGHCorosync: corosync: denial of service and information disclosure via crafted udp packet
Title source: cnaDescription
A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User Datagram Protocol (UDP) packet. This can lead to an out-of-bounds read, causing a denial of service (DoS) and potentially disclosing limited memory contents
References (16)
Core 16
Core References
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:13644
https://access.redhat.com/errata/RHSA-2026:13644
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:13657
https://access.redhat.com/errata/RHSA-2026:13657
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:13673
https://access.redhat.com/errata/RHSA-2026:13673
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:14205
https://access.redhat.com/errata/RHSA-2026:14205
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:14210
https://access.redhat.com/errata/RHSA-2026:14210
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:14211
https://access.redhat.com/errata/RHSA-2026:14211
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:14212
https://access.redhat.com/errata/RHSA-2026:14212
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:14213
https://access.redhat.com/errata/RHSA-2026:14213
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:14214
https://access.redhat.com/errata/RHSA-2026:14214
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:14215
https://access.redhat.com/errata/RHSA-2026:14215
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:14216
https://access.redhat.com/errata/RHSA-2026:14216
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-35091
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2453813
https://bugzilla.redhat.com/show_bug.cgi?id=2453813
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:19043
https://access.redhat.com/errata/RHSA-2026:19043
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:19200
https://access.redhat.com/errata/RHSA-2026:19200
Scores
CVSS v3
8.2
EPSS
0.0022
EPSS Percentile
44.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-253
Status
published
Products (28)
corosync/corosync
Red Hat/Red Hat Enterprise Linux 10
Red Hat/Red Hat Enterprise Linux 10
0:3.1.10-1.el10_2.1
Red Hat/Red Hat Enterprise Linux 10
0:3.1.9-2.el10_1.1
Red Hat/Red Hat Enterprise Linux 10.0 Extended Update Support
0:3.1.9-1.el10_0.2
Red Hat/Red Hat Enterprise Linux 7
Red Hat/Red Hat Enterprise Linux 8
Red Hat/Red Hat Enterprise Linux 8
0:3.1.8-1.el8_10.1
Red Hat/Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
0:3.1.0-3.el8_4.2
Red Hat/Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
0:3.1.0-3.el8_4.2
... and 18 more
Published
Apr 01, 2026
Tracked Since
Apr 01, 2026