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CVE-2016-9941 · cross-distro fix matrix

CVE-2016-9941: Heap-based buffer overflow in rfbproto.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message containing a subrectangle outside of the client drawing area.

Affects 8 Linux releases across 11 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2016-9941 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

  • libvncserver→ fixed in0.9.11+dfsg-1urgency: not yet assigned
    sudo apt-get install --only-upgrade -y libvncserver
  • veyon→ fixed in4.1.4+repack1-1urgency: not yet assigned
    sudo apt-get install --only-upgrade -y veyon

Debian bookworm

Source: Debian Security Tracker

  • libvncserver→ fixed in0.9.11+dfsg-1urgency: not yet assigned
    sudo apt-get install --only-upgrade -y libvncserver
  • veyon→ fixed in4.1.4+repack1-1urgency: not yet assigned
    sudo apt-get install --only-upgrade -y veyon

Debian trixie

Source: Debian Security Tracker

  • libvncserver→ fixed in0.9.11+dfsg-1urgency: not yet assigned
    sudo apt-get install --only-upgrade -y libvncserver
  • veyon→ fixed in4.1.4+repack1-1urgency: not yet assigned
    sudo apt-get install --only-upgrade -y veyon

Alpine v3.20

Source: Alpine secdb

  • libvncserver→ fixed in0.9.11-r0
    apk update && apk add --upgrade libvncserver

Alpine v3.21

Source: Alpine secdb

  • libvncserver→ fixed in0.9.11-r0
    apk update && apk add --upgrade libvncserver

Alpine edge

Source: Alpine secdb

  • libvncserver→ fixed in0.9.11-r0
    apk update && apk add --upgrade libvncserver

Alpine v3.18

Source: Alpine secdb

  • libvncserver→ fixed in0.9.11-r0
    apk update && apk add --upgrade libvncserver

Alpine v3.19

Source: Alpine secdb

  • libvncserver→ fixed in0.9.11-r0
    apk update && apk add --upgrade libvncserver
Are YOU affected by CVE-2016-9941?

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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