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Fencer Vulns
critical 9.0

CVE-2025-30472 json

Corosync through 3.1.9, if encryption is disabled or the attacker knows the encryption key, has a stack-based buffer overflow in orf_token_…

published 2025-03-22 19 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-7198

cvss
9.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits
0
none known

Summary

Corosync through 3.1.9, if encryption is disabled or the attacker knows the encryption key, has a stack-based buffer overflow in orf_token_endian_convert in exec/totemsrp.c via a large UDP packet.

Patch / fix

  • corosync Debian 12 3.1.7-1+deb12u1
  • corosync Debian 14, Debian 13 3.1.9-2

debian advisories DEBIAN-CVE-2025-30472

  • corosync Ubuntu 20.04 LTS 3.0.3-2ubuntu2.2
  • corosync Ubuntu 22.04 LTS 3.1.6-1ubuntu1.1
  • corosync Ubuntu 24.04 LTS 3.1.7-1ubuntu3.1
  • corosync Ubuntu 25.10 3.1.8-3ubuntu2

ubuntu advisories UBUNTU-CVE-2025-30472

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • corosync RHEL 10.0 3.1.9-1.el10_0.1
  • corosynclib RHEL 10.0 3.1.9-1.el10_0.1
  • corosync-vqsim RHEL 10.0 3.1.9-1.el10_0.1
  • corosync RHEL 9 3.1.9-2.el9_6
  • corosynclib RHEL 9 3.1.9-2.el9_6
  • corosync-vqsim RHEL 9 3.1.9-2.el9_6

red hat advisories RHSA-2025:7478RHSA-2025:7201

  • corosync SLE High Availability Extension 15 SP6, SLE High Availability Extension 15 SP5, SLE High Availability Extension 15 SP4 +2 more 2.4.6-150300.12.13.1

suse advisories SUSE-SU-2025:1084-1

  • corosync openSUSE Tumbleweed 3.1.9-2.1

opensuse advisories openSUSE-SU-2025:14933-1

  • corosynclib AlmaLinux 9 3.1.9-2.el9_6
  • corosync-vqsim AlmaLinux 9 3.1.9-2.el9_6
  • corosynclib AlmaLinux 10 3.1.9-1.el10_0.1
  • corosync-vqsim AlmaLinux 10 3.1.9-1.el10_0.1

almalinux advisories ALSA-2025:7201ALSA-2025:7478

  • corosync Rocky Linux 9 3.1.9-2.el9_6
  • corosync Rocky Linux 10 3.1.9-1.el10_0.1

rocky linux advisories RLSA-2025:7201RLSA-2025:7478

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-30472 updated cvss 6.6

corosync: Stack buffer overflow from 'orf_token_endian_convert'

  • Red Hat Enterprise Linux 7 corosync, spausedd, corosynclib, corosync-qnetd, corosync-qdevice Red Hat Enterprise Linux 8 corosync, spausedd, corosynclib, corosync-vqsim
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux AppStream (v. 9) corosync 3.1.9-2.el9_6, corosynclib 3.1.9-2.el9_6
    fixed: vendor fix RHSA-2025:7201
  • Red Hat Enterprise Linux AppStream (v. 10) corosync 3.1.9-1.el10_0.1, corosynclib 3.1.9-1.el10_0.1
    fixed: vendor fix RHSA-2025:7478
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) corosync-vqsim 3.1.9-2.el9_6
    fixed: vendor fix RHSA-2025:7201
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) corosync-vqsim 3.1.9-1.el10_0.1
    fixed: vendor fix RHSA-2025:7478
  • Red Hat Enterprise Linux High Availability (v. 9) corosync 3.1.9-2.el9_6
    fixed: vendor fix RHSA-2025:7201
  • Red Hat Enterprise Linux High Availability (v. 10) corosync 3.1.9-1.el10_0.1
    fixed: vendor fix RHSA-2025:7478
  • Red Hat Enterprise Linux Resilient Storage (v. 9) corosync 3.1.9-2.el9_6
    fixed: vendor fix RHSA-2025:7201

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
19 mo ago

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/corosync/corosync/issues/778 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Corosync Corosync

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.