Description
Bouncy Castle BC Java before 1.66, BC C# .NET before 1.8.7, BC-FJA before 1.0.1.2, 1.0.2.1, and BC-FNA before 1.0.1.1 have a timing issue within the EC math library that can expose information about the private key when an attacker is able to observe timing information for the generation of multiple deterministic ECDSA signatures.
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | bouncycastle | 1.68-1 | — |
| Debian 13 | bouncycastle | 1.68-1 | — |
| Debian 12 | bouncycastle | 1.68-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | bouncycastle | 1.64-3.3.1 | SUSE-SU-2021:2163-1 |
| SLES 15 SP2 | bouncycastle | 1.64-3.3.1 | SUSE-SU-2021:2163-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | bouncycastle | 1.68-3.2 | openSUSE-SU-2024:10661-1 |
| openSUSE Leap 15.3 | bouncycastle | 1.64-3.3.1 | openSUSE-SU-2021:2163-1 |
| openSUSE Leap 15.2 | bouncycastle | 1.64-lp152.2.3.1 | openSUSE-SU-2021:0940-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.bouncycastle:bc-fips | < 1.0.2.1 | 1.0.2.1 | GHSA-6xx3-rg99-gc3p |
| Maven | org.bouncycastle:bcprov-ext-jdk15on | < 1.66 | 1.66 | GHSA-6xx3-rg99-gc3p |
| Maven | org.bouncycastle:bcprov-ext-jdk16 | < 1.66 | 1.66 | GHSA-6xx3-rg99-gc3p |
| Maven | org.bouncycastle:bcprov-jdk14 | < 1.66 | 1.66 | GHSA-6xx3-rg99-gc3p |
| Maven | org.bouncycastle:bcprov-jdk15 | < 1.66 | 1.66 | GHSA-6xx3-rg99-gc3p |
| Maven | org.bouncycastle:bcprov-jdk15on | < 1.66 | 1.66 | GHSA-6xx3-rg99-gc3p |
| Maven | org.bouncycastle:bcprov-jdk15to18 | < 1.66 | 1.66 | GHSA-6xx3-rg99-gc3p |
| Maven | org.bouncycastle:bcprov-jdk16 | < 1.66 | 1.66 | GHSA-6xx3-rg99-gc3p |
| NuGet | BouncyCastle | < 1.8.7 | 1.8.7 | GHSA-6xx3-rg99-gc3p |
Advisories 4
- openSUSE-SU-2024:10661-1 bouncycastle-1.68-3.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0940-1 Security update for bouncycastle SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2163-1 Security update for bouncycastle SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:2163-1 Security update for bouncycastle SUSE / openSUSE Security Updates · May 7, 2025