CVE-2026-15997

LowCVSS 1.7

Published: 16/07/2026(UTC)Updated: 17/07/2026(UTC)Translated: 18/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.10%

1th percentile - higher than 1% of all known CVEs

Summary

An out-of-bounds write vulnerability was found in Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on on ARM, leading to buffer overflows. The issue is present in the shake.c and sha3.c files under native_c/arm/sha.

Risk Assessment

An attacker could exploit this vulnerability to execute code or cause a system crash if the application accepts SHA3/SHAKE states from potentially untrusted sources.

Recommendation

Immediately update BC-LTS to version 2.73.12.1 or later and restrict acceptance of SHA3/SHAKE states to trusted sources only.

Original NVD description (English source)

Out-of-bounds write vulnerability in Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on on ARM allows Overflow Buffers. This vulnerability is associated with program files https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/shake.C, https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/sha3.C. This issue affects BC-LTS: from 2.73.0 before 2.73.12.1. Issue is only applicable if application involved is accepting memoable SHA3 / SHAKE states from potentially untrusted sources.