Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Corosync | Corosync | ≤ 3.1.9 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | corosync | 3.1.9-2 | — |
| Debian 13 | corosync | 3.1.9-2 | — |
| Debian 12 | corosync | 3.1.7-1+deb12u1 | — |
| Debian 11 | corosync | 3.1.2-2+deb11u1 | DLA-4308-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | corosync | 3.1.8-3ubuntu2 | — |
| Ubuntu 24.04 LTS | corosync | 3.1.7-1ubuntu3.1 | USN-7478-1 |
| Ubuntu 22.04 LTS | corosync | 3.1.6-1ubuntu1.1 | USN-7478-1 |
| Ubuntu 20.04 LTS | corosync | 3.0.3-2ubuntu2.2 | USN-7478-1 |
| Ubuntu 18.04 LTS | corosync | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | corosync | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | corosync +3 | 3.1.9-1.el10_0.1 | RHSA-2025:7478 |
| RHEL 9 | corosync +3 | 3.1.9-2.el9_6 | RHSA-2025:7201 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | corosynclib +1 | 3.1.9-1.el10_0.1 | ALSA-2025:7478 |
| AlmaLinux 9 | corosynclib +1 | 3.1.9-2.el9_6 | ALSA-2025:7201 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | corosync | 3.1.9-1.el10_0.1 | RLSA-2025:7478 |
| Rocky Linux 9 | corosync | 3.1.9-2.el9_6 | RLSA-2025:7201 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | corosync | 2.4.6-150300.12.13.1 | SUSE-SU-2025:1084-1 |
| SLES 15 SP5 | corosync | 2.4.6-150300.12.13.1 | SUSE-SU-2025:1084-1 |
| SLES 15 SP4 | corosync | 2.4.6-150300.12.13.1 | SUSE-SU-2025:1084-1 |
| SLES 15 SP3 | corosync | 2.4.6-150300.12.13.1 | SUSE-SU-2025:1084-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | corosync | 3.1.9-2.1 | openSUSE-SU-2025:14933-1 |
| openSUSE Leap 15.6 | corosync | 2.4.6-150300.12.13.1 | SUSE-SU-2025:1084-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | corosync +5 | 2.4.3-6.amzn2.1.1 | ALAS2-2026-3811 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | corosync | No fix yet | — |
| Azure Linux 2 (CBL-Mariner) | corosync | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | corosync +2 | 3.1.9-1.el10_0.1 | ELSA-2025-7478 |
| Oracle Linux 9 | corosynclib +1 | 3.1.9-2.el9_6 | ELSA-2025-7201 |
Advisories 14
- ALSA-2025:7478 Moderate: corosync security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:7201 Moderate: corosync security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2025:7478 Red Hat Security Advisory: corosync security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2025:7201 Red Hat Security Advisory: corosync security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- ALAS2-2026-3811 Important: corosync security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 20, 2026
- WID-SEC-2025-1041 Red Hat Enterprise Linux (corosync): Schwachstelle ermöglicht Codeausführung BSI CERT-Bund (WID) · Apr 27, 2026
- USN-7478-1 corosync vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-4308-1 corosync - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2025:1084-1 Security update for corosync SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2025:14933-1 corosync-3.1.9-2.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- RLSA-2025:7201 Moderate: corosync security update Rocky Linux Security Advisories · Oct 7, 2025
- RLSA-2025:7478 Moderate: corosync security update Rocky Linux Security Advisories · Oct 3, 2025
- ELSA-2025-7478 Moderate: corosync security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 2, 2025
- ELSA-2025-7201 Moderate: corosync security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 16, 2025