Description
A flaw was found in FreeIPA. A low-privilege authenticated user can exploit this vulnerability by submitting an oversized One-Time Password (OTP) key value. This oversized key is then decoded and re-encoded without proper size limits, consuming excessive CPU and memory resources. This can lead to a denial of service, degrading the availability of the IPA service.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 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 | freeipa | No fix yet | — |
| Debian 13 | freeipa | No fix yet | — |
| Debian 12 | freeipa | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | freeipa | No fix yet | — |
| Ubuntu 26.04 LTS | freeipa | No fix yet | — |
| Ubuntu 24.04 LTS | freeipa | No fix yet | — |
| Ubuntu 22.04 LTS | freeipa | No fix yet | — |
| Ubuntu 20.04 LTS | freeipa | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | freeipa | No fix yet | — |
| Ubuntu Pro 16.04 LTS | freeipa | No fix yet | — |
| Ubuntu Pro 14.04 LTS | freeipa | No fix yet | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | ipa-client +10 | 4.6.8-5.amzn2.17.10 | ALAS2-2026-4008 |
Advisories 1
- ALAS2-2026-4008 Moderate: ipa security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 26, 2026
References
- https://access.redhat.com/security/cve/CVE-2026-73196 vdb-entry
- RHBZ#2474712 issue-tracking