CVE-2020-26939 · cross-distro fix matrix

CVE-2020-26939: In Legion of the Bouncy Castle BC before 1.61 and BC-FJA before 1.0.1.2, attackers can obtain sensitive information about a private exponent because of Observable Differences in Behavior to Error Inputs. This occurs in org.bouncycastle.crypto.encodings.OAEPEncoding. Sending invalid ciphertext that d

Affects 3 Linux releases across 3 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2020-26939 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

bouncycastle→ fixed in1.61-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y bouncycastle
```

Debian bookworm

Source: Debian Security Tracker

bouncycastle→ fixed in1.61-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y bouncycastle
```

Debian trixie

Source: Debian Security Tracker

bouncycastle→ fixed in1.61-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y bouncycastle
```

Are YOU affected by CVE-2020-26939?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

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