CVE-2021-33657 · cross-distro fix matrix

CVE-2021-33657: There is a heap overflow problem in video/SDL_pixels.c in SDL (Simple DirectMedia Layer) 2.x to 2.0.18 versions. By crafting a malicious .BMP file, an attacker can cause the application using this library to crash, denial of service or Code execution.

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-33657 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

libsdl2→ fixed in2.0.14+dfsg2-3+deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libsdl2
```

Debian bookworm

Source: Debian Security Tracker

libsdl1.2→ fixed in1.2.15+dfsg2-7urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libsdl1.2
```
libsdl2→ fixed in2.0.20+dfsg-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libsdl2
```

Debian trixie

Source: Debian Security Tracker

libsdl2→ fixed in2.0.20+dfsg-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libsdl2
```

Alpine v3.20

Source: Alpine secdb

sdl2→ fixed in2.0.18-r0
```
apk update && apk add --upgrade sdl2
```

Alpine v3.21

Source: Alpine secdb

sdl2→ fixed in2.0.18-r0
```
apk update && apk add --upgrade sdl2
```

Alpine edge

Source: Alpine secdb

sdl2→ fixed in2.0.18-r0
```
apk update && apk add --upgrade sdl2
```

Alpine v3.18

Source: Alpine secdb

sdl2→ fixed in2.0.18-r0
```
apk update && apk add --upgrade sdl2
```

Alpine v3.19

Source: Alpine secdb

sdl2→ fixed in2.0.18-r0
```
apk update && apk add --upgrade sdl2
```

Are YOU affected by CVE-2021-33657?

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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