Description
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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Legion of the Bouncy Castle | BC-LTS | 2.73.0 – < 2.73.12.1 | 2.73.12.1 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | bouncycastle | No fix yet | — |
| Ubuntu 26.04 LTS | bouncycastle | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | bouncycastle | No fix yet | — |
| Ubuntu Pro 22.04 LTS | bouncycastle | No fix yet | — |
| Ubuntu Pro 20.04 LTS | bouncycastle | No fix yet | — |
| Ubuntu Pro 18.04 LTS | bouncycastle | No fix yet | — |
| Ubuntu Pro 16.04 LTS | bouncycastle | No fix yet | — |
Advisories 1
- WID-SEC-2026-2399 Bouncy Castle: Schwachstelle ermöglicht nicht spezifizierten Angriff BSI CERT-Bund (WID) · Jul 16, 2026