Buffer overflow in Corosync
CVE-2025-30472
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (37.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
Affected products
- Corosync — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/corosync/corosync/blob/73ba225cc48ebb1903897c792065cb5e876613b0/exec… (Product)
- github.com/corosync/corosync/issues/778 (Exploit, Issue Tracking)
- corosync.org (Product)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-30472?
- CVE-2025-30472 is a critical-severity vulnerability in Corosync, classified under Stack-based Buffer Overflow. CVSS score: 9.0/10. Published 2025-03-22.
- How severe is CVE-2025-30472?
- Critical severity. CVSS v3 base score is 9.0 out of 10.
- Is CVE-2025-30472 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.