CVE-2026-35091
corosync: A flaw was found in Corosync
CVE-2026-35091 is fixed in 17 products on 1 platform, first by RHSA-2026:14205, released April 1, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
8.2
high
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0088
59th percentile
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
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| corosync · Debian 12.15 (bookworm) | 3.1.7-1+deb12u2 | DEBIAN-CVE-2026-35091 | Apr 1, 2026 |
| corosync · Debian 13.5 (trixie) | 3.1.9-2+deb13u1 | DEBIAN-CVE-2026-35091 | Apr 1, 2026 |
| corosync · Debian 14 | 3.1.10-2 | DEBIAN-CVE-2026-35091 | Apr 1, 2026 |
| corosync · RHEL 10 | 3.1.9-1.el10_0.2 | RHSA-2026:14205 | Apr 1, 2026 |
| corosync · RHEL 8 | 0:3.1.8-1.el8_10.1 | RHSA-2026:13657 | May 15, 2026 |
| corosync · RHEL 9 | 0:3.1.10-1.el9_8.1 | RHSA-2026:19200 | May 15, 2026 |
| corosync · Ubuntu 22.04.1 LTS (jammy) | 3.1.6-1ubuntu1.2 | corosync 3.1.6-1ubuntu1.2 | Apr 15, 2026 |
| corosync · Ubuntu 24.04.5 LTS (noble) | 3.1.7-1ubuntu3.2 | corosync 3.1.7-1ubuntu3.2 | Apr 15, 2026 |
| corosync · Ubuntu 25.10 (questing) | 3.1.9-2ubuntu1.1 | corosync 3.1.9-2ubuntu1.1 | Apr 15, 2026 |
| corosync · almalinux 10 | 3.1.10-1.el10_2.1 | ALSA-2026:19043 | May 19, 2026 |
| corosync · almalinux 8 | 3.1.8-1.el8_10.1 | ALSA-2026:13657 | May 5, 2026 |
| corosync · almalinux 9 | 3.1.10-1.el9_8.1 | ALSA-2026:19200 | May 19, 2026 |
| corosync · amzn 2023 | 3.1.9-3.amzn2023.0.2 | ALAS2023-2026-1560 | Apr 13, 2026 |
| corosync · ol 10 | 0:3.1.9-2.el10_1.1 | ELSA-2026-13644 | May 5, 2026 |
| corosync · ol 8 | 0:3.1.8-1.el8_10.1 | ELSA-2026-13657 | May 8, 2026 |
| corosync · ol 9 | 0:3.1.9-2.el9_7.1 | ELSA-2026-13673 | May 11, 2026 |
| corosync · opensuse-leap 15.6 | 2.4.6-150300.12.16.1 | SUSE-SU-2026:1394-1 | Apr 16, 2026 |
| corosync · opensuse-leap 16.0 | 3.1.9-160000.3.1 | OPENSUSE-SU-2026:20505-1 | Apr 10, 2026 |
| corosync · rocky 10 | 0:3.1.10-1.el10_2.1 | RLSA-2026:19043 | May 29, 2026 |
| corosync · rocky 8 | 0:3.1.8-1.el8_10.1 | RLSA-2026:13657 | May 6, 2026 |
| corosync · rocky 9 | 0:3.1.10-1.el9_8.1 | RLSA-2026:19200 | May 28, 2026 |
| corosync · sles 15.6 | 2.4.6-150300.12.16.1 | SUSE-SU-2026:1394-1 | Apr 16, 2026 |
| corosync · sles 15.7 | 2.4.6-150300.12.16.1 | SUSE-SU-2026:1394-1 | Apr 16, 2026 |
| corosync · sles 16.0 | 3.1.9-160000.3.1 | SUSE-SU-2026:21224-1 | Apr 10, 2026 |
| corosync-debuginfo · amzn 2023 | 3.1.9-3.amzn2023.0.2 | ALAS2023-2026-1560 | Apr 13, 2026 |
| corosync-debugsource · amzn 2023 | 3.1.9-3.amzn2023.0.2 | ALAS2023-2026-1560 | Apr 13, 2026 |
| corosync-notifyd · Ubuntu 22.04.1 LTS (jammy) | 3.1.6-1ubuntu1.2 | corosync-notifyd 3.1.6-1ubuntu1.2 | Apr 15, 2026 |
| corosync-notifyd · Ubuntu 24.04.5 LTS (noble) | 3.1.7-1ubuntu3.2 | corosync-notifyd 3.1.7-1ubuntu3.2 | Apr 15, 2026 |
| corosync-notifyd · Ubuntu 25.10 (questing) | 3.1.9-2ubuntu1.1 | corosync-notifyd 3.1.9-2ubuntu1.1 | Apr 15, 2026 |
| corosync-vqsim · RHEL 8 | 0:3.1.8-1.el8_10.1 | RHSA-2026:13657 | May 15, 2026 |
| corosync-vqsim · RHEL 9 | 0:3.1.10-1.el9_8.1 | RHSA-2026:19200 | May 15, 2026 |
| corosync-vqsim · Ubuntu 22.04.1 LTS (jammy) | 3.1.6-1ubuntu1.2 | corosync-vqsim 3.1.6-1ubuntu1.2 | Apr 15, 2026 |
| corosync-vqsim · Ubuntu 24.04.5 LTS (noble) | 3.1.7-1ubuntu3.2 | corosync-vqsim 3.1.7-1ubuntu3.2 | Apr 15, 2026 |
| corosync-vqsim · Ubuntu 25.10 (questing) | 3.1.9-2ubuntu1.1 | corosync-vqsim 3.1.9-2ubuntu1.1 | Apr 15, 2026 |
| corosync-vqsim · almalinux 10 | 3.1.10-1.el10_2.1 | ALSA-2026:19043 | May 19, 2026 |
| corosync-vqsim · almalinux 8 | 3.1.8-1.el8_10.1 | ALSA-2026:13657 | May 5, 2026 |
| corosync-vqsim · almalinux 9 | 3.1.10-1.el9_8.1 | ALSA-2026:19200 | May 19, 2026 |
| corosync-vqsim · amzn 2023 | 3.1.9-3.amzn2023.0.2 | ALAS2023-2026-1560 | Apr 13, 2026 |
| corosync-vqsim · ol 10 | 0:3.1.9-2.el10_1.1 | ELSA-2026-13644 | May 5, 2026 |
| corosync-vqsim · ol 8 | 0:3.1.8-1.el8_10.1 | ELSA-2026-13657 | May 8, 2026 |
| corosync-vqsim · ol 9 | 0:3.1.9-2.el9_7.1 | ELSA-2026-13673 | May 11, 2026 |
| corosync-vqsim-debuginfo · amzn 2023 | 3.1.9-3.amzn2023.0.2 | ALAS2023-2026-1560 | Apr 13, 2026 |
| corosynclib · RHEL 8 | 0:3.1.8-1.el8_10.1 | RHSA-2026:13657 | May 15, 2026 |
| corosynclib · RHEL 9 | 0:3.1.10-1.el9_8.1 | RHSA-2026:19200 | May 15, 2026 |
| corosynclib · almalinux 10 | 3.1.10-1.el10_2.1 | ALSA-2026:19043 | May 19, 2026 |
| corosynclib · almalinux 8 | 3.1.8-1.el8_10.1 | ALSA-2026:13657 | May 5, 2026 |
| corosynclib · almalinux 9 | 3.1.10-1.el9_8.1 | ALSA-2026:19200 | May 19, 2026 |
| corosynclib · amzn 2023 | 3.1.9-3.amzn2023.0.2 | ALAS2023-2026-1560 | Apr 13, 2026 |
| corosynclib · ol 10 | 0:3.1.9-2.el10_1.1 | ELSA-2026-13644 | May 5, 2026 |
| corosynclib · ol 8 | 0:3.1.8-1.el8_10.1 | ELSA-2026-13657 | May 8, 2026 |
| corosynclib · ol 9 | 0:3.1.9-2.el9_7.1 | ELSA-2026-13673 | May 11, 2026 |
| corosynclib-debuginfo · amzn 2023 | 3.1.9-3.amzn2023.0.2 | ALAS2023-2026-1560 | Apr 13, 2026 |
| corosynclib-devel · RHEL 8 | 0:3.1.8-1.el8_10.1 | RHSA-2026:13657 | May 15, 2026 |
| corosynclib-devel · RHEL 9 | 0:3.1.10-1.el9_8.1 | RHSA-2026:19200 | May 15, 2026 |
| corosynclib-devel · almalinux 10 | 3.1.10-1.el10_2.1 | ALSA-2026:19043 | May 19, 2026 |
| corosynclib-devel · almalinux 8 | 3.1.8-1.el8_10.1 | ALSA-2026:13657 | May 5, 2026 |
| corosynclib-devel · almalinux 9 | 3.1.10-1.el9_8.1 | ALSA-2026:19200 | May 19, 2026 |
| corosynclib-devel · amzn 2023 | 3.1.9-3.amzn2023.0.2 | ALAS2023-2026-1560 | Apr 13, 2026 |
| libcfg7 · Ubuntu 22.04.1 LTS (jammy) | 3.1.6-1ubuntu1.2 | libcfg7 3.1.6-1ubuntu1.2 | Apr 15, 2026 |
| libcfg7 · Ubuntu 24.04.5 LTS (noble) | 3.1.7-1ubuntu3.2 | libcfg7 3.1.7-1ubuntu3.2 | Apr 15, 2026 |
| libcfg7 · Ubuntu 25.10 (questing) | 3.1.9-2ubuntu1.1 | libcfg7 3.1.9-2ubuntu1.1 | Apr 15, 2026 |
| libcmap4 · Ubuntu 22.04.1 LTS (jammy) | 3.1.6-1ubuntu1.2 | libcmap4 3.1.6-1ubuntu1.2 | Apr 15, 2026 |
| libcmap4 · Ubuntu 24.04.5 LTS (noble) | 3.1.7-1ubuntu3.2 | libcmap4 3.1.7-1ubuntu3.2 | Apr 15, 2026 |
| libcmap4 · Ubuntu 25.10 (questing) | 3.1.9-2ubuntu1.1 | libcmap4 3.1.9-2ubuntu1.1 | Apr 15, 2026 |
| libcorosync-common4 · Ubuntu 22.04.1 LTS (jammy) | 3.1.6-1ubuntu1.2 | libcorosync-common4 3.1.6-1ubuntu1.2 | Apr 15, 2026 |
| libcorosync-common4 · Ubuntu 24.04.5 LTS (noble) | 3.1.7-1ubuntu3.2 | libcorosync-common4 3.1.7-1ubuntu3.2 | Apr 15, 2026 |
| libcorosync-common4 · Ubuntu 25.10 (questing) | 3.1.9-2ubuntu1.1 | libcorosync-common4 3.1.9-2ubuntu1.1 | Apr 15, 2026 |
| libcpg4 · Ubuntu 22.04.1 LTS (jammy) | 3.1.6-1ubuntu1.2 | libcpg4 3.1.6-1ubuntu1.2 | Apr 15, 2026 |
| libcpg4 · Ubuntu 24.04.5 LTS (noble) | 3.1.7-1ubuntu3.2 | libcpg4 3.1.7-1ubuntu3.2 | Apr 15, 2026 |
| libcpg4 · Ubuntu 25.10 (questing) | 3.1.9-2ubuntu1.1 | libcpg4 3.1.9-2ubuntu1.1 | Apr 15, 2026 |
| libquorum5 · Ubuntu 22.04.1 LTS (jammy) | 3.1.6-1ubuntu1.2 | libquorum5 3.1.6-1ubuntu1.2 | Apr 15, 2026 |
| libquorum5 · Ubuntu 24.04.5 LTS (noble) | 3.1.7-1ubuntu3.2 | libquorum5 3.1.7-1ubuntu3.2 | Apr 15, 2026 |
| libquorum5 · Ubuntu 25.10 (questing) | 3.1.9-2ubuntu1.1 | libquorum5 3.1.9-2ubuntu1.1 | Apr 15, 2026 |
| libsam4 · Ubuntu 22.04.1 LTS (jammy) | 3.1.6-1ubuntu1.2 | libsam4 3.1.6-1ubuntu1.2 | Apr 15, 2026 |
| libsam4 · Ubuntu 24.04.5 LTS (noble) | 3.1.7-1ubuntu3.2 | libsam4 3.1.7-1ubuntu3.2 | Apr 15, 2026 |
| libsam4 · Ubuntu 25.10 (questing) | 3.1.9-2ubuntu1.1 | libsam4 3.1.9-2ubuntu1.1 | Apr 15, 2026 |
| libvotequorum8 · Ubuntu 22.04.1 LTS (jammy) | 3.1.6-1ubuntu1.2 | libvotequorum8 3.1.6-1ubuntu1.2 | Apr 15, 2026 |
| libvotequorum8 · Ubuntu 24.04.5 LTS (noble) | 3.1.7-1ubuntu3.2 | libvotequorum8 3.1.7-1ubuntu3.2 | Apr 15, 2026 |
| libvotequorum8 · Ubuntu 25.10 (questing) | 3.1.9-2ubuntu1.1 | libvotequorum8 3.1.9-2ubuntu1.1 | Apr 15, 2026 |
| spausedd · RHEL 8 | 0:3.1.8-1.el8_10.1 | RHSA-2026:13657 | May 15, 2026 |
| spausedd · almalinux 8 | 3.1.8-1.el8_10.1 | ALSA-2026:13657 | May 5, 2026 |
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