Upstream information
Description
In Bouncy Castle for Java from 1.73 to before 1.78, three ML-KEM (CRYSTALS-Kyber) routines divided secret-derived polynomial coefficients by the modulus q: Poly.toMsg, which decodes the decrypted message, and the ciphertext compression routines Poly.compressPoly and PolyVec.compressPolyVec. An attacker able to measure the timing of a large number of decapsulations performed with the same long-term private key can recover that key. These are the KyberSlash1 (Poly.toMsg) and KyberSlash2 (ciphertext compression) divisions. Compression performed during encapsulation operates on values that become the public ciphertext and is not affected.SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having moderate severity.
| CVSS detail | SUSE |
|---|---|
| Base Score | 5.9 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality Impact | High |
| Integrity Impact | None |
| Availability Impact | None |
| CVSSv3 Version | 3.1 |
| CVSS detail | CNA (91579145-5d7b-4cc5-b925-a0262ff19630) | SUSE |
|---|---|---|
| Base Score | 8.2 | 8.2 |
| Vector | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| Attack Vector | Network | Network |
| Attack Complexity | High | High |
| Attack Requirements | Present | Present |
| Privileges Required | None | None |
| User Interaction | None | None |
| Vulnerable System Confidentiality Impact | High | High |
| Vulnerable System Integrity Impact | None | None |
| Vulnerable System Availability Impact | None | None |
| Subsequent System Confidentiality Impact | None | None |
| Subsequent System Integrity Impact | None | None |
| Subsequent System Availability Impact | None | None |
| CVSSv4 Version | 4.0 | 4.0 |
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Please note that this evaluation state might be work in progress, incomplete or outdated.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 | bouncycastle | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | bouncycastle | Not affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server 15 SP7 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server 16.0 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server 16.1 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | bouncycastle | Not affected |
| openSUSE Leap 16.0 | bouncycastle | Not affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | bouncycastle | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | bouncycastle | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | bouncycastle | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | bouncycastle | Not affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP4 | bouncycastle | Not affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP5 | bouncycastle | Not affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP6 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server 15 SP4 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | bouncycastle | Not affected |
| SUSE Linux Enterprise Server 15 SP5 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | bouncycastle | Not affected |
| SUSE Linux Enterprise Server 15 SP6 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | bouncycastle | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | bouncycastle | Not affected |
| SUSE Manager Proxy 4.3 | bouncycastle | Not affected |
| SUSE Manager Retail Branch Server 4.3 | bouncycastle | Not affected |
| SUSE Manager Server 4.3 | bouncycastle | Not affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Enterprise Storage 7 | bouncycastle | Not affected |
| SUSE Enterprise Storage 7.1 | bouncycastle | Not affected |
| SUSE Linux Enterprise Desktop 15 SP2 | bouncycastle | Not affected |
| SUSE Linux Enterprise Desktop 15 SP3 | bouncycastle | Not affected |
| SUSE Linux Enterprise Desktop 15 SP4 | bouncycastle | Not affected |
| SUSE Linux Enterprise Desktop 15 SP5 | bouncycastle | Not affected |
| SUSE Linux Enterprise Desktop 15 SP6 | bouncycastle | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | bouncycastle | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | bouncycastle | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | bouncycastle | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | bouncycastle | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | bouncycastle | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | bouncycastle | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | bouncycastle | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | bouncycastle | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | bouncycastle | Not affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP2 | bouncycastle | Not affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | bouncycastle | Not affected |
| SUSE Linux Enterprise Real Time 15 SP2 | bouncycastle | Not affected |
| SUSE Linux Enterprise Real Time 15 SP3 | bouncycastle | Not affected |
| SUSE Linux Enterprise Real Time 15 SP4 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server 15 SP2 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | bouncycastle | Not affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | bouncycastle | Not affected |
| SUSE Linux Enterprise Server 15 SP3 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | bouncycastle | Not affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | bouncycastle | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | bouncycastle | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | bouncycastle | Not affected |
| SUSE Manager Proxy 4.1 | bouncycastle | Not affected |
| SUSE Manager Proxy 4.2 | bouncycastle | Not affected |
| SUSE Manager Retail Branch Server 4.1 | bouncycastle | Not affected |
| SUSE Manager Retail Branch Server 4.2 | bouncycastle | Not affected |
| SUSE Manager Server 4.1 | bouncycastle | Not affected |
| SUSE Manager Server 4.2 | bouncycastle | Not affected |
| openSUSE Leap 15.3 | bouncycastle | Not affected |
| openSUSE Leap 15.4 | bouncycastle | Not affected |
| openSUSE Leap 15.5 | bouncycastle | Not affected |
| openSUSE Leap 15.6 | bouncycastle | Not affected |
| Container Status | ||
| containers/apache-pulsar:3.3 | bouncycastle | Not affected |
SUSE Timeline for this CVE
CVE page created: Tue Jul 28 13:22:34 2026CVE page last modified: Tue Jul 28 13:22:34 2026