CVE-2026-35091

highpriority · track · 0EPSS 0.009 · 59 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.87% (59th) EPSS

CVSS 8.2 · high

Is it mine?

59 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedcorosync-0:3.1.10-4.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcorosync-0:3.1.10-4.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcorosync-0:3.1.10-4.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcorosync-0:3.1.10-4.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcorosync-devel-0:3.1.10-4.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcorosync-devel-0:3.1.10-4.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcorosync-devel-0:3.1.10-4.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcorosync-devel-0:3.1.10-4.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcorosync-libs-0:3.1.10-4.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcorosync-libs-0:3.1.10-4.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcorosync-libs-0:3.1.10-4.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedcorosync-libs-0:3.1.10-4.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

cvss

Technical severity, 0–10. One row per scoring source.

8.2

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.18.2highAV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Hsecondary · ENISA EU

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Hsecondary · secalert@redhat.com USexploitability 3.9 · impact 4.2

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Hsecondary · SUSE Product Security

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-253USCWE-253US

affected products (59)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
IBM DB2all versionscert_bundDEcpe:/a:ibm:db2:-
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat Enterprise Linux <10all versionscert_bundDE
Red Hat Enterprise Linux< 10cert_bundDE
Red Hat Red Hat Enterprise Linux 10< 0:3.1.10-1.el10_2.1enisa_euvdEU
Red Hat Red Hat Enterprise Linux 10< 0:3.1.9-2.el10_1.1enisa_euvdEU
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support< 0:3.1.9-1.el10_0.2enisa_euvdEU
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support< 0:2.4.5-7.el7_9.3enisa_euvdEU
Red Hat Red Hat Enterprise Linux 8< 0:3.1.8-1.el8_10.1enisa_euvdEU
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support< 0:3.1.0-3.el8_4.2enisa_euvdEU
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On< 0:3.1.0-3.el8_4.2enisa_euvdEU
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support< 0:3.1.5-2.el8_6.1enisa_euvdEU
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service< 0:3.1.5-2.el8_6.1enisa_euvdEU
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions< 0:3.1.5-2.el8_6.1enisa_euvdEU
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service< 0:3.1.7-1.el8_8.1enisa_euvdEU
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions< 0:3.1.7-1.el8_8.1enisa_euvdEU
Red Hat Red Hat Enterprise Linux 9< 0:3.1.10-1.el9_8.1enisa_euvdEU

showing 20 of 59

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1358Red Hat Enterprise Linux (corosync): Mehrere Schwachstellen ermöglichen Denial of ServiceDeutsch2026-05-04csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux (corosync) ausnutzen, um einen Denial of Service Angriff durchzuführen.
openSUSE-SU-2026:10488-1corosync-3.1.10-4.1 on GA media2026-04-04csaf · suse_csafDE
corosync-3.1.10-4.1 on GA media

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund suse_csaf NVD CVE.org MITRE

published 2026-04-01modified 2026-10-26

references (51)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan