Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2024-14041

CVE-2024-14041HIGH

Legion of the Bouncy Castle Inc. BC-JAVA — ML-KEM (Kyber) decapsulation leaks private key information through non-constant-time division in message decoding and ciphertext compression (KyberSlash)

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   H   P   N   N   H   N   N    8.2   .0034   25.7     —

AFFECTED
  Product  Versions  Fixed
  BC-JAVA  1.73 –    —

TIMELINE
  Jul 28  Reserved by bcorg
  Jul 28  Published (CNA: bcorg)
  Aug 26  EXPLOIT PUBLISHED — CVE-2024-14041 (Legion of the Bouncy Castle Inc. BC-JAVA). Public exploit reference added.

CWE-208 · CNA: bcorg · CVSS v4.0 · 4 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 28, 2026	Reserved	Reserved by bcorg
July 28, 2026	Published	Published (CNA: bcorg)
August 26, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2024-14041 (Legion of the Bouncy Castle Inc. BC-JAVA). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Legion of the Bouncy Castle Inc.	BC-JAVA	—	1.73	—

Weaknesses

CWE-208

References (4)

https://github.com/bcgit/bc-java/commit/1590247178f2280defa36421475f015175dfbe9e [Patch]
https://github.com/bcgit/bc-java/commit/5adb2c5c5b462a332b01a012bea0784b40b904e5 [Patch]
https://github.com/bcgit/bc-java/wiki/CVE-2024-14041 [Vendor Advisory]
https://kyberslash.cr.yp.to/ [Exploit]

Authoritative record: CVE-2024-14041 at cve.org

Vendors: legion of the bouncy castle

Weaknesses: CWE-208

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2024-14041 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.