Description
In FreeRADIUS 3.0.x before 3.0.20, the EAP-pwd module used a global OpenSSL BN_CTX instance to handle all handshakes. This mean multiple threads use the same BN_CTX instance concurrently, resulting in crashes when concurrent EAP-pwd handshakes are initiated. This can be abused by an adversary as a Denial-of-Service (DoS) attack.
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 | freeradius | 3.0.20+dfsg-1 | — |
| Debian 13 | freeradius | 3.0.20+dfsg-1 | — |
| Debian 12 | freeradius | 3.0.20+dfsg-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | freeradius | 3.0.26~dfsg~git20220223.1.00ed0241fa-0ubuntu3.1 | USN-5785-1 |
| Ubuntu 20.04 LTS | freeradius | 3.0.20+dfsg-3ubuntu0.2 | USN-5785-1 |
| Ubuntu 18.04 LTS | freeradius | 3.0.16+dfsg-1ubuntu3.2 | USN-5785-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | freeradius | 2.2.8+dfsg-0.1ubuntu0.1+esm1 | USN-5785-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | freeradius +12 | 3.0.20-3.module+el8.3.0+7597+67902674 | RHSA-2020:4799 |
| RHEL 7 | freeradius +11 | 3.0.13-15.el7 | RHSA-2020:3984 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | freeradius | 3.0.20-3.module+el8.4.0+576+2d493411 | RLSA-2020:4799 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | freeradius-server | 3.0.16-3.6.1 | SUSE-SU-2020:1023-1 |
| SLES 15 | freeradius-server | 3.0.16-3.6.1 | SUSE-SU-2020:1023-1 |
| SLES 12 SP5 | freeradius-server | 3.0.19-3.3.1 | SUSE-SU-2020:1020-1 |
| SLES 12 SP4 | freeradius-server | 3.0.15-2.14.1 | SUSE-SU-2020:1018-1 |
| SLES 12 SP3 | freeradius-server | 3.0.15-2.14.1 | SUSE-SU-2020:1018-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | freeradius-server | 3.0.3-17.15.2 | SUSE-SU-2020:2391-1 |
| SLES for SAP 15 | freeradius-server | 3.0.16-3.6.1 | SUSE-SU-2020:1023-1 |
| SLES for SAP 12 SP5 | freeradius-server | 3.0.19-3.3.1 | SUSE-SU-2020:1020-1 |
| SLES for SAP 12 SP4 | freeradius-server | 3.0.15-2.14.1 | SUSE-SU-2020:1018-1 |
| SLES for SAP 12 SP3 | freeradius-server | 3.0.15-2.14.1 | SUSE-SU-2020:1018-1 |
| SLES for SAP 12 SP2 | freeradius-server | 3.0.3-17.15.2 | SUSE-SU-2020:2391-1 |
| SLE HPC 15 | freeradius-server | 3.0.16-3.6.1 | SUSE-SU-2020:1023-1 |
| SUSE OpenStack Cloud Crowbar 8 | freeradius-server | 3.0.15-2.14.1 | SUSE-SU-2020:1018-1 |
| SUSE OpenStack Cloud 8 | freeradius-server | 3.0.15-2.14.1 | SUSE-SU-2020:1018-1 |
| SUSE OpenStack Cloud 7 | freeradius-server | 3.0.3-17.15.2 | SUSE-SU-2020:2391-1 |
| SUSE HPE Helion OpenStack 8 | freeradius-server | 3.0.15-2.14.1 | SUSE-SU-2020:1018-1 |
| SUSE Enterprise Storage 5 | freeradius-server | 3.0.15-2.14.1 | SUSE-SU-2020:1018-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | freeradius-server | 3.0.23-1.5 | openSUSE-SU-2024:10767-1 |
| openSUSE Leap 15.1 | freeradius-server | 3.0.16-lp151.4.4.1 | openSUSE-SU-2020:0553-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | freeradius +11 | 3.0.13-15.amzn2 | ALAS2-2020-1515 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | freeradius +12 | 3.0.20-3.module+el8.3.0+7821+dc9b437c | ELSA-2020-4799 |
| Oracle Linux 7 | freeradius +11 | 3.0.13-15.el7 | ELSA-2020-3984 |
Advisories 13
- RHSA-2020:3984 Red Hat Security Advisory: freeradius security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-5785-1 freeradius vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- RLSA-2020:4799 Moderate: freeradius:3.0 security and bug fix update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:10767-1 freeradius-server-3.0.23-1.5 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1023-1 Security update for freeradius-server SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1018-1 Security update for freeradius-server SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0553-1 Security update for freeradius-server SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1020-1 Security update for freeradius-server SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2020:4799 Red Hat Security Advisory: freeradius:3.0 security and bug fix update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- SUSE-SU-2020:2391-1 Security update for freeradius-server SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2020-4799 Moderate: freeradius:3.0 security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 10, 2020
- ALAS2-2020-1515 Moderate: freeradius security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 22, 2020
- ELSA-2020-3984 Moderate: freeradius security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 6, 2020