CVE-2021-21300 · cross-distro fix matrix

CVE-2021-21300: Git is an open-source distributed revision control system. In affected versions of Git a specially crafted repository that contains symbolic links as well as files using a clean/smudge filter such as Git LFS, may cause just-checked out script to be executed while cloning onto a case-insensitive file

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-21300 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

git→ fixed in1:2.30.2-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y git
```

Debian bookworm

Source: Debian Security Tracker

git→ fixed in1:2.30.2-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y git
```

Debian trixie

Source: Debian Security Tracker

git→ fixed in1:2.30.2-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y git
```

Alpine v3.20

Source: Alpine secdb

git→ fixed in2.30.2-r0
```
apk update && apk add --upgrade git
```

Alpine v3.21

Source: Alpine secdb

git→ fixed in2.30.2-r0
```
apk update && apk add --upgrade git
```

Alpine edge

Source: Alpine secdb

git→ fixed in2.30.2-r0
```
apk update && apk add --upgrade git
```

Alpine v3.18

Source: Alpine secdb

git→ fixed in2.30.2-r0
```
apk update && apk add --upgrade git
```

Alpine v3.19

Source: Alpine secdb

git→ fixed in2.30.2-r0
```
apk update && apk add --upgrade git
```

Are YOU affected by CVE-2021-21300?

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

Continuous monitoring beats manual checking

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