Upstream information
Description
In Bouncy Castle for Java before 1.86, several password-based key derivation entry points ran the KDF with cost parameters taken from the untrusted input being processed, without bounding them, so a small input could dictate an arbitrary amount of work before any password or integrity check could reject it. The affected paths are the RFC 9579 PBMAC1 MAC calculator builders, which took the PBKDF2 iteration count and derived-key length straight out of PBMAC1Params (JcePBMac1CalculatorBuilder, and PKCS12PBEUtils.createPBMac1Calculator reached from PKCS12PfxPdu.isMacValid); the scrypt parallelization parameter p in the PKCS#8 and PKCS#12 cost guards, which bounded only the cost parameter N and the block size r even though the scratch buffer scales with r times p, so the configured memory ceiling could be evaded entirely; the raw JCA PBKDF2 provider (org.bouncycastle.jcajce.provider.symmetric.PBEPBKDF2); and the bcrypt round count read from an encrypted OpenSSH v1 private key's own kdfoptions. Each now bounds the parameter before deriving, in line with the caps already applied elsewhere in the tree, with the OpenSSH round count configurable through the new org.bouncycastle.openssh.max_rounds property. This completes the bounding begun in 1.85 for the PKCS#8 / PBES2 decryptors (CVE-2026-15055). This issue also affects Bouncy Castle for Java LTS before 2.73.13, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.13 (1.0.X series), 2.0.13 (2.0.X series) and 2.1.13 (2.1.X series).SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | SUSE |
|---|---|
| Base Score | 4.3 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Unchanged |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Low |
| CVSSv3 Version | 3.1 |
| CVSS detail | CNA (91579145-5d7b-4cc5-b925-a0262ff19630) | SUSE |
|---|---|---|
| Base Score | 5.3 | 5.3 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/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:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/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 |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Attack Requirements | None | None |
| Privileges Required | None | None |
| User Interaction | Passive | Passive |
| Vulnerable System Confidentiality Impact | None | None |
| Vulnerable System Integrity Impact | None | None |
| Vulnerable System Availability Impact | Low | Low |
| 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 | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 | bouncycastle | Affected |
| SUSE Linux Enterprise Server 15 SP7 | bouncycastle | Affected |
| SUSE Linux Enterprise Server 16.0 | bouncycastle | Affected |
| SUSE Linux Enterprise Server 16.1 | bouncycastle | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | bouncycastle | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | bouncycastle | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | bouncycastle | Affected |
| openSUSE Leap 16.0 | bouncycastle | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | bouncycastle | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | bouncycastle | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | bouncycastle | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP4 | bouncycastle | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP5 | bouncycastle | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP6 | bouncycastle | Affected |
| SUSE Linux Enterprise Server 15 SP4 | bouncycastle | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | bouncycastle | Affected |
| SUSE Linux Enterprise Server 15 SP5 | bouncycastle | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | bouncycastle | Affected |
| SUSE Linux Enterprise Server 15 SP6 | bouncycastle | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | bouncycastle | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | bouncycastle | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | bouncycastle | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | bouncycastle | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Enterprise Storage 7 | bouncycastle | Affected |
| SUSE Enterprise Storage 7.1 | bouncycastle | Affected |
| SUSE Linux Enterprise Desktop 15 SP2 | bouncycastle | Affected |
| SUSE Linux Enterprise Desktop 15 SP3 | bouncycastle | Affected |
| SUSE Linux Enterprise Desktop 15 SP4 | bouncycastle | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | bouncycastle | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | bouncycastle | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | bouncycastle | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | bouncycastle | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | bouncycastle | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | bouncycastle | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | bouncycastle | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | bouncycastle | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | bouncycastle | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | bouncycastle | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | bouncycastle | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP2 | bouncycastle | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | bouncycastle | Affected |
| SUSE Linux Enterprise Real Time 15 SP2 | bouncycastle | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | bouncycastle | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | bouncycastle | Affected |
| SUSE Linux Enterprise Server 15 SP2 | bouncycastle | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | bouncycastle | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | bouncycastle | Affected |
| SUSE Linux Enterprise Server 15 SP3 | bouncycastle | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | bouncycastle | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | bouncycastle | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | bouncycastle | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | bouncycastle | Affected |
| SUSE Manager Proxy 4.1 | bouncycastle | Affected |
| SUSE Manager Proxy 4.2 | bouncycastle | Affected |
| SUSE Manager Proxy 4.3 | bouncycastle | Affected |
| SUSE Manager Retail Branch Server 4.1 | bouncycastle | Affected |
| SUSE Manager Retail Branch Server 4.2 | bouncycastle | Affected |
| SUSE Manager Retail Branch Server 4.3 | bouncycastle | Affected |
| SUSE Manager Server 4.1 | bouncycastle | Affected |
| SUSE Manager Server 4.2 | bouncycastle | Affected |
| SUSE Manager Server 4.3 | bouncycastle | Affected |
| openSUSE Leap 15.3 | bouncycastle | Affected |
| openSUSE Leap 15.4 | bouncycastle | Affected |
| openSUSE Leap 15.5 | bouncycastle | Affected |
| openSUSE Leap 15.6 | bouncycastle | Affected |
| Products at an unknown state of their lifecycle. | ||
| SUSE Linux Enterprise Server for NVIDIA 16.1 | bouncycastle | Affected |
| Container Status | ||
| containers/apache-pulsar:3.3 | bouncycastle | Affected |
SUSE Timeline for this CVE
CVE page created: Fri Oct 2 15:33:56 2026CVE page last modified: Fri Oct 2 17:35:24 2026