CVE-2021-23840 · cross-distro fix matrix

CVE-2021-23840: Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating succe

Affects 8 Linux releases across 9 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-23840 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

openssl→ fixed in1.1.1j-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y openssl
```

Debian bookworm

Source: Debian Security Tracker

openssl→ fixed in1.1.1j-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y openssl
```

Debian trixie

Source: Debian Security Tracker

openssl→ fixed in1.1.1j-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y openssl
```

Alpine v3.20

Source: Alpine secdb

openssl→ fixed in1.1.1j-r0
```
apk update && apk add --upgrade openssl
```

Alpine v3.21

Source: Alpine secdb

openssl→ fixed in1.1.1j-r0
```
apk update && apk add --upgrade openssl
```

Alpine edge

Source: Alpine secdb

openssl→ fixed in1.1.1j-r0
```
apk update && apk add --upgrade openssl
```

Alpine v3.18

Source: Alpine secdb

openssl→ fixed in1.1.1j-r0
```
apk update && apk add --upgrade openssl
```

openssl1.1-compat→ fixed in1.1.1j-r0

apk update && apk add --upgrade openssl1.1-compat

Alpine v3.19

Source: Alpine secdb

openssl→ fixed in1.1.1j-r0
```
apk update && apk add --upgrade openssl
```

Are YOU affected by CVE-2021-23840?

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.

curl https://mindsparkstack.com/scan.sh | bash

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