CVE-2026-15997 — Native ARM SHA3 / SHAKE `restoreFullState` fails to detect size_t underflow in a crafted encoded state

CVE-2026-15997

Native ARM SHA3 / SHAKE `restoreFullState` fails to detect size_t underflow in a crafted encoded state PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Legion of the Bouncy Castle Inc. / BC-LTS	affected 2.73.0 before 2.73.12.1

CWE

CWE-787

References

https://github.com/bcgit/bc-lts-java/wiki/CVE-2026-15997

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.