CVE-2020-14363 · cross-distro fix matrix

CVE-2020-14363: An integer overflow vulnerability leading to a double-free was found in libX11. This flaw allows a local privileged attacker to cause an application compiled with libX11 to crash, or in some cases, result in arbitrary code execution. The highest threat from this flaw is to confidentiality, integrity

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

Fix per ecosystem

Each block below is a distro release where CVE-2020-14363 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

libx11→ fixed in2:1.6.12-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libx11
```

Debian bookworm

Source: Debian Security Tracker

libx11→ fixed in2:1.6.12-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libx11
```

Debian trixie

Source: Debian Security Tracker

libx11→ fixed in2:1.6.12-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libx11
```

Alpine v3.20

Source: Alpine secdb

libx11→ fixed in1.6.12-r0
```
apk update && apk add --upgrade libx11
```

Alpine v3.21

Source: Alpine secdb

libx11→ fixed in1.6.12-r0
```
apk update && apk add --upgrade libx11
```

Alpine edge

Source: Alpine secdb

libx11→ fixed in1.6.12-r0
```
apk update && apk add --upgrade libx11
```

Alpine v3.18

Source: Alpine secdb

libx11→ fixed in1.6.12-r0
```
apk update && apk add --upgrade libx11
```

Alpine v3.19

Source: Alpine secdb

libx11→ fixed in1.6.12-r0
```
apk update && apk add --upgrade libx11
```

Are YOU affected by CVE-2020-14363?

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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