CVE-2021-22890 · cross-distro fix matrix

CVE-2021-22890: curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3, libcurl can confuse session tickets arriving from the HTTPS proxy but work as if they arrived from

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-22890 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

curl→ fixed in7.74.0-1.2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y curl
```

Debian bookworm

Source: Debian Security Tracker

curl→ fixed in7.74.0-1.2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y curl
```

Debian trixie

Source: Debian Security Tracker

curl→ fixed in7.74.0-1.2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y curl
```

Alpine v3.20

Source: Alpine secdb

curl→ fixed in7.76.0-r0
```
apk update && apk add --upgrade curl
```

Alpine v3.21

Source: Alpine secdb

curl→ fixed in7.76.0-r0
```
apk update && apk add --upgrade curl
```

Alpine edge

Source: Alpine secdb

curl→ fixed in7.76.0-r0
```
apk update && apk add --upgrade curl
```

Alpine v3.18

Source: Alpine secdb

curl→ fixed in7.76.0-r0
```
apk update && apk add --upgrade curl
```

Alpine v3.19

Source: Alpine secdb

curl→ fixed in7.76.0-r0
```
apk update && apk add --upgrade curl
```

Are YOU affected by CVE-2021-22890?

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

Form-based quickscan View on NVD

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