CVE-2026-15997
LowCVSS 1.7Exploitation Probability (EPSS)
Low risk1th 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.
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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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

