Red Hat Enterprise Linux (libtpms): Schwachstelle ermöglicht Denial of Service
WID-SEC-2025-1673 · first 30.07.2025 · updated 23.09.2026 · CVSS 5,9
What it is about
Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution. Die libtpms-Bibliothek ermöglicht die Software-Emulation eines Trusted Platform Module (TPM 1.2 und TPM 2.0). Ein lokaler Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux und libtpms ausnutzen, um einen Denial of Service Angriff durchzuführen.
Under what conditions?
Only with access to the device or an account on it. Often the second step after a phishing email.
What can happen in the worst case
An attacker could use the vulnerability to
- einen Denial of Service Angriff durchzuführen
Am I affected?
Affected according to the BSI:
- Red Hat Enterprise Linux
- SUSE Linux
- Oracle Linux
- RESF Rocky Linux
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux 9.4
- Red Hat Enterprise Linux 9.2
- Open Source libtpms <0.7.12
- Open Source libtpms <0.8.10
- Open Source libtpms <0.9.7
- Open Source libtpms <0.10.1
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source libtpms 0.7.12
- Open Source libtpms 0.8.10
- Open Source libtpms 0.9.7
- Open Source libtpms 0.10.1
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Red Hat Security Advisory vom 2025-07-29 access.redhat.com
- Red Hat Security Advisory vom 2025-07-29 access.redhat.com
- Red Hat Security Advisory vom 2025-07-29 access.redhat.com
- Oracle Linux Security Advisory ELSA-2025-12100 vom 2025-07-30 linux.oracle.com
- Red Hat Security Advisory RHSA-2025:12293 vom 2025-07-30 access.redhat.com
- Rocky Linux Security Advisory RLSA-2025:12527 vom 2025-09-08 errata.build.resf.org
- Red Hat Security Advisory RHSA-2025:16428 vom 2025-09-23 access.redhat.com
- Oracle Linux Security Advisory ELSA-2025-16428 vom 2025-09-23 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2026-5578 vom 2026-03-26 linux.oracle.com
- SUSE Security Update SUSE-SU-2026:21064-1 vom 2026-04-13 lists.suse.com
- SUSE Security Update SUSE-SU-2026:1388-1 vom 2026-04-16 lists.suse.com
- SUSE Security Update SUSE-SU-2026:21571-1 vom 2026-05-11 lists.suse.com
- SUSE Security Update SUSE-SU-2026:21581-1 vom 2026-05-15 lists.suse.com
- SUSE Security Update SUSE-SU-2026:4278-1 vom 2026-09-22 lists.suse.com
CVE: CVE-2025-49133
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.