Upstream information
Description
liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. From 0.11.0 through 0.16.0, builds configured with OQS_ENABLE_SIG_STFL_LMS=ON can read beyond a caller-supplied signature buffer when an untrusted truncated LMS or HSS-LMS signature reaches OQS_SIG_STFL_verify or OQS_SIG_STFL_alg_lms_verify. In hss_validate_signature_init() in src/sig_stfl/lms/external/hss_verify_inc.c, consumed-length checks do not ensure that the bottom-level q and C fields remain available, allowing up to 32 bytes to be read past the buffer. In version 0.16.0, is_hss_public_key() also reads at offset 8 after only a four-byte length check, allowing an over-read of up to eight bytes. No valid signature is required, but the public key must be syntactically plausible. The read data is consumed only by an internal hash and is not exposed, so the supported impact is a possible verifier crash and denial of service, not memory disclosure or acceptance of an invalid signature. This issue is scheduled to be fixed in version 0.17.0.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (GitHub) | SUSE |
|---|---|---|
| Base Score | 5.3 | 5.3 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Privileges Required | None | None |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | None | None |
| Integrity Impact | None | None |
| Availability Impact | Low | Low |
| CVSSv3 Version | 3.1 | 3.1 |
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Please note that this evaluation state might be work in progress, incomplete or outdated.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 Desktop 15 SP7 | liboqs | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | liboqs | Affected |
| SUSE Linux Enterprise Server 15 SP7 | liboqs | Affected |
| SUSE Linux Enterprise Server 16.0 | liboqs | Affected |
| SUSE Linux Enterprise Server 16.1 | liboqs | Affected |
| SUSE Linux Enterprise Server for NVIDIA 16.1 | liboqs | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | liboqs | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | liboqs | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | liboqs | Affected |
| openSUSE Leap 16.0 | liboqs | Affected |
| openSUSE Leap 16.1 | liboqs | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise Server 15 SP6-LTSS | liboqs | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | liboqs | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise Desktop 15 SP6 | liboqs | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | liboqs | Affected |
| SUSE Linux Enterprise Server 15 SP6 | liboqs | Affected |
| openSUSE Leap 15.6 | liboqs | Affected |
SUSE Timeline for this CVE
CVE page created: Mon Nov 9 12:01:31 2026CVE page last modified: Fri Nov 13 14:05:09 2026