Red Hat Security Advisory: corosync security update

Fixed packages 8

Vulnerabilities 2

• High 8.2
  CVE-2026-35091

  Corosync: corosync: denial of service and information disclosure via crafted udp packet

  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-…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 10 Linux Debian Ubuntu Azure Linux
  Apr 1, 2026
• High 7.5
  CVE-2026-35092

  Corosync: corosync: denial of service via integer overflow in join message validation

  A flaw was found in Corosync. An integer overflow vulnerability in Corosync's join message sanity validation allows a remote, unauthenticated attacker to send crafted User Datagram Protocol (UDP) packets. This can cause the service to crash, leading to a deni…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 10 Linux Debian Ubuntu Azure Linux
  Apr 1, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#moderate
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2453813
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2453814
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_19043.json
• report
  https://access.redhat.com/security/cve/CVE-2026-35091
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-35091
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-35091
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2453169
• report
  https://access.redhat.com/security/cve/CVE-2026-35092
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-35092
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-35092