CVE-2026-15997 json
Native ARM SHA3 / SHAKE `restoreFullState` fails to detect size_t underflow in a crafted encoded state
published 2026-07-16 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-45068
- cvss
- 1.7
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 3%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Legion of the Bouncy Castle Inc. BC-LTS 2.73.12.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 1.7 | CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/S:P/AU:N/R:A/V:D/RE:M/U:Amber |
| CNA | 4.0 | 1.7 | CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:N/R:A/V:D/RE:M/U:Amber |
Affected products
- Legion of the Bouncy Castle Inc. BC-LTS
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
Sources
- CVE List CVE-2026-15997
- NVD CVE-2026-15997
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