Upstream information
Description
An out-of-bounds read vulnerability was found in swtpm's SWTPM_NVRAM_CheckHeader() function. The entry guard checks the buffer length against sizeof(bh), where bh is a pointer, instead of sizeof(*bh), the actual struct size. This allows an undersized buffer to pass validation, causing a 2-byte heap overread on 64-bit systems (6 bytes on 32-bit) when accessing the totlen field. This may cause daemon termination on some platforms and leaks heap data to the log.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (Red Hat) | SUSE |
|---|---|---|
| Base Score | 6.1 | 6.1 |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H |
| Attack Vector | Local | Local |
| Attack Complexity | Low | Low |
| Privileges Required | Low | Low |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | Low | Low |
| Integrity Impact | None | None |
| Availability Impact | High | High |
| CVSSv3 Version | 3.1 | 3.1 |
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| openSUSE Tumbleweed |
| Patchnames: openSUSE-Tumbleweed-2026-11598 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP7 | swtpm | Affected |
| SUSE Linux Enterprise Micro 5.3 | swtpm | Affected |
| SUSE Linux Enterprise Micro 5.4 | swtpm | Affected |
| SUSE Linux Enterprise Micro 5.5 | swtpm | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | swtpm | Affected |
| SUSE Linux Enterprise Server 15 SP7 | swtpm | Affected |
| SUSE Linux Enterprise Server 16.0 | swtpm | Affected |
| SUSE Linux Enterprise Server 16.1 | swtpm | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | swtpm | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | swtpm | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | swtpm | Affected |
| SUSE Linux Micro 6.0 | swtpm | Affected |
| SUSE Linux Micro 6.1 | swtpm | Affected |
| SUSE Linux Micro 6.2 | swtpm | Affected |
| openSUSE Leap 16.0 | swtpm | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | swtpm | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | swtpm | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | swtpm | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP4 | swtpm | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP5 | swtpm | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP6 | swtpm | Affected |
| SUSE Linux Enterprise Server 15 SP4 | swtpm | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | swtpm | Affected |
| SUSE Linux Enterprise Server 15 SP5 | swtpm | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | swtpm | Affected |
| SUSE Linux Enterprise Server 15 SP6 | swtpm | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | swtpm | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | swtpm | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | swtpm | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | swtpm | Affected |
| SUSE Manager Proxy 4.3 | swtpm | Affected |
| SUSE Manager Proxy LTS 4.3 | swtpm | Affected |
| SUSE Manager Retail Branch Server 4.3 | swtpm | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | swtpm | Affected |
| SUSE Manager Server 4.3 | swtpm | Affected |
| SUSE Manager Server LTS 4.3 | swtpm | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Enterprise Storage 7.1 | swtpm | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | swtpm | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | swtpm | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | swtpm | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | swtpm | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | swtpm | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | swtpm | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | swtpm | Affected |
| SUSE Linux Enterprise Micro 5.1 | swtpm | Affected |
| SUSE Linux Enterprise Micro 5.2 | swtpm | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP3 | swtpm | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | swtpm | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | swtpm | Affected |
| SUSE Linux Enterprise Server 15 SP3 | swtpm | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | swtpm | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | swtpm | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | swtpm | Affected |
| SUSE Manager Proxy 4.2 | swtpm | Affected |
| SUSE Manager Retail Branch Server 4.2 | swtpm | Affected |
| SUSE Manager Server 4.2 | swtpm | Affected |
| openSUSE Leap 15.3 | swtpm | Affected |
| openSUSE Leap 15.4 | swtpm | Affected |
| openSUSE Leap 15.5 | swtpm | Affected |
| openSUSE Leap 15.6 | swtpm | Affected |
| openSUSE Leap Micro 5.2 | swtpm | Affected |
| openSUSE Leap Micro 5.3 | swtpm | Affected |
| openSUSE Leap Micro 5.4 | swtpm | Affected |
| openSUSE Leap Micro 5.5 | swtpm | Affected |
| Container Status | ||
| suse/sles/15.3/virt-launcher:0.45.0 suse/sles/15.4/virt-launcher:0.49.0 suse/sles/15.5/virt-launcher:0.58.0 suse/sles/15.6/virt-launcher:1.1.1 suse/sles/15.7/virt-launcher:1.5.0 | swtpm | Affected |
SUSE Timeline for this CVE
CVE page created: Thu Aug 20 21:20:08 2026CVE page last modified: Wed Aug 26 11:48:11 2026