CVE-2020-29074 · cross-distro fix matrix

CVE-2020-29074: scan.c in x11vnc 0.9.16 uses IPC_CREAT|0777 in shmget calls, which allows access by actors other than the current user.

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

Fix per ecosystem

Each block below is a distro release where CVE-2020-29074 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

x11vnc→ fixed in0.9.16-5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y x11vnc
```

Debian bookworm

Source: Debian Security Tracker

x11vnc→ fixed in0.9.16-5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y x11vnc
```

Debian trixie

Source: Debian Security Tracker

x11vnc→ fixed in0.9.16-5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y x11vnc
```

Alpine v3.20

Source: Alpine secdb

x11vnc→ fixed in0.9.16-r2
```
apk update && apk add --upgrade x11vnc
```

Alpine v3.21

Source: Alpine secdb

x11vnc→ fixed in0.9.16-r2
```
apk update && apk add --upgrade x11vnc
```

Alpine edge

Source: Alpine secdb

x11vnc→ fixed in0.9.16-r2
```
apk update && apk add --upgrade x11vnc
```

Alpine v3.18

Source: Alpine secdb

x11vnc→ fixed in0.9.16-r2
```
apk update && apk add --upgrade x11vnc
```

Alpine v3.19

Source: Alpine secdb

x11vnc→ fixed in0.9.16-r2
```
apk update && apk add --upgrade x11vnc
```

Are YOU affected by CVE-2020-29074?

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

CVE-2020-29074dropped silently in your distro's update channel. Every new CVE is the same story. StackPatch runs the matcher hourly against all 5 sources and emails the exact remediation when something new applies to one of your servers. $99 lifetime, 50 founder seats, 30-day refund.

See StackPatch ($99 lifetime)