CVE-2026-18036

In Bouncy Castle for Java before 1.86, NTRU reduced secret values with the % operator in three helpers whose reference implementations are deliberately division-free, so each reduction was carried out by an integer division whose latency depends on the secret operand. Polynomial.modQ divided by a...

Linux Distros Unpatched Vulnerability : CVE-2026-18036

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In Bouncy Castle for Java before 1.86, NTRU reduced secret values with the % operator in three helpers whose reference implementations are deliberately...

CVE-2026-18036

A flaw was found in Bouncy Castle. A timing side-channel vulnerability in the NTRU algorithm can lead to information disclosure. The implementation performs variable-time division operations on secret data instead of constant-time calculations, causing processing time to vary depending on the...

Timing Attack

Overview org.bouncycastle:bcprov-jdk15to18 is a Java implementation of cryptographic algorithms. Affected versions of this package are vulnerable to Timing Attack through the mod3 and modQ reduction helpers in org.bouncycastle.pqc.math.ntru.Polynomial and...

DEBIAN-CVE-2026-18036

In Bouncy Castle for Java before 1.86, NTRU reduced secret values with the % operator in three helpers whose reference implementations are deliberately division-free, so each reduction was carried out by an integer division whose latency depends on the secret operand. Polynomial.modQ divided by a...

CVE-2026-18036

In Bouncy Castle for Java before 1.86, NTRU reduced secret values with the % operator in three helpers whose reference implementations are deliberately division-free, so each reduction was carried out by an integer division whose latency depends on the secret operand. Polynomial.modQ divided by a...

UBUNTU-CVE-2026-18036

In Bouncy Castle for Java before 1.86, NTRU reduced secret values with the % operator in three helpers whose reference implementations are deliberately division-free, so each reduction was carried out by an integer division whose latency depends on the secret operand. Polynomial.modQ divided by a...

EUVD-2026-91317

In Bouncy Castle for Java before 1.86, NTRU reduced secret values with the % operator in three helpers whose reference implementations are deliberately division-free, so each reduction was carried out by an integer division whose latency depends on the secret operand. Polynomial.modQ divided by a...

CVE-2026-18036 NTRU leaks private key information by reducing secret values with a non-constant-time integer division

In Bouncy Castle for Java before 1.86, NTRU reduced secret values with the % operator in three helpers whose reference implementations are deliberately division-free, so each reduction was carried out by an integer division whose latency depends on the secret operand. Polynomial.modQ divided by a...

CVE-2026-18036 NTRU leaks private key information by reducing secret values with a non-constant-time integer division

In Bouncy Castle for Java before 1.86, NTRU reduced secret values with the % operator in three helpers whose reference implementations are deliberately division-free, so each reduction was carried out by an integer division whose latency depends on the secret operand. Polynomial.modQ divided by a...

CVE-2026-18036

In Bouncy Castle for Java before 1.86, NTRU reduced secret values with the % operator in three helpers whose reference implementations are deliberately division-free, so each reduction was carried out by an integer division whose latency depends on the secret operand. Polynomial.modQ divided by a...

CVE-2026-18036

Bouncy Castle for Java versions prior to 1.86 are vulnerable to a timing side-channel attack in the NTRU implementation. The root cause is the use of the % operator in three helpers, leading to integer division where latency depends on the secret operand. Specifically, Polynomial.modQ divides by ...

CVE-2026-18036 NTRU leaks private key information by reducing secret values with a non-constant-time integer division

In Bouncy Castle for Java before 1.86, NTRU reduced secret values with the % operator in three helpers whose reference implementations are deliberately division-free, so each reduction was carried out by an integer division whose latency depends on the secret operand. Polynomial.modQ divided by a...

PT-2026-104155

Name of the Vulnerable Software and Affected Versions Bouncy Castle for Java versions prior to 1.86 Description NTRU secret values are reduced using the % operator in three helper functions, which deviates from the division-free reference implementations. This results in integer divisions where...

CVE-2026-18036: Observable Timing Discrepancy

In Bouncy Castle for Java before 1.86, NTRU reduced secret values with the % operator in three helpers whose reference implementations are deliberately division-free, so each reduction was carried out by an integer division whose latency depends on the secret operand. Polynomial.modQ divided by a...

ANT-2026-C6E98TYX · liboqs · Uninitialized Function Pointer (CWE-824)

other high Severity Claude high · Security research firm high · Maintainer - Discovered by Claude Mythos Preview REPORT Anthropic's analysis, sealed at approval. Disclosure to the maintainer was performed by Ada Logics. ANT-2026-C6E98TYX: 01-liboqs-ntru-uninit-fn-ptr The NTRU constructors in...

Post-Quantum Cryptography: an Analysis of Code-Based and Lattice-Based Cryptosystems

Most modern cryptographic systems, such as RSA and the Diffie-Hellman Key Exchange, rely on "trapdoor" mathematical functions that are presumed to be computationally difficult with existing tools. However, quantum computers will be able to break these systems using Shor's Algorithm, necessitating...

WS-2023-0093

Unsound FFI: Wrong API usage in all versions of ntru causes write past allocated area. When compiled with debug assertions, the code above will trigger a attempt to subtract with overflow panic before UB occurs. Other mistakes e.g. using EncParams from a different key may always trigger UB. Likel...

ntru-rs has unsound FFI: Wrong API usage causes write past allocated area

The following usage causes undefined behavior. rust let kp: ntru::types::KeyPair = …; kp.getpublic.exportDefault::default When compiled with debug assertions, the code above will trigger a attempt to subtract with overflow panic before UB occurs. Other mistakes e.g. using EncParams from a differe...

GHSA-FQ33-VMHV-48XH ntru-rs has unsound FFI: Wrong API usage causes write past allocated area

The following usage causes undefined behavior. rust let kp: ntru::types::KeyPair = …; kp.getpublic.exportDefault::default When compiled with debug assertions, the code above will trigger a attempt to subtract with overflow panic before UB occurs. Other mistakes e.g. using EncParams from a differe...