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CVE-2026-32854

Medium priority
Needs evaluation

LibVNCServer versions 0.9.15 and prior (fixed in commit dc78dee) contain null pointer dereference vulnerabilities in the HTTP proxy handlers within httpProcessInput() in httpd.c that allow remote attackers to cause a denial of...

6 affected packages

libvncserver, vino, x11vnc, veyon, italc, tightvnc

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libvncserver Needs evaluation Needs evaluation Needs evaluation Needs evaluation
vino Needs evaluation Needs evaluation Needs evaluation Needs evaluation
x11vnc Needs evaluation Needs evaluation Needs evaluation Needs evaluation
veyon Needs evaluation Needs evaluation Needs evaluation
italc Not in release Not in release Needs evaluation
tightvnc Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-32853

Medium priority
Needs evaluation

LibVNCServer versions 0.9.15 and prior (fixed in commit 009008e) contain a heap out-of-bounds read vulnerability in the UltraZip encoding handler that allows a malicious VNC server to cause information disclosure or application...

6 affected packages

veyon, libvncserver, vino, x11vnc, italc, tightvnc

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
veyon Needs evaluation Needs evaluation Needs evaluation
libvncserver Needs evaluation Needs evaluation Needs evaluation Needs evaluation
vino Needs evaluation Needs evaluation Needs evaluation Needs evaluation
x11vnc Needs evaluation Needs evaluation Needs evaluation Needs evaluation
italc Not in release Not in release Needs evaluation
tightvnc Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2020-29260

Low priority
Needs evaluation

libvncclient v0.9.13 was discovered to contain a memory leak via the function rfbClientCleanup().

6 affected packages

libvncserver, tightvnc, veyon, x11vnc, italc, vino

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libvncserver Needs evaluation Needs evaluation Needs evaluation Needs evaluation
tightvnc Needs evaluation Needs evaluation Needs evaluation Needs evaluation
veyon Needs evaluation Needs evaluation Needs evaluation Not in release
x11vnc Needs evaluation Needs evaluation Needs evaluation Needs evaluation
italc Not in release Not in release Needs evaluation
vino Not affected Not affected Not affected Not affected
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CVE-2020-25708

Medium priority

Some fixes available 17 of 53

A divide by zero issue was found to occur in libvncserver-0.9.12. A malicious client could use this flaw to send a specially crafted message that, when processed by the VNC server, would lead to a floating point exception,...

6 affected packages

x11vnc, libvncserver, vino, italc, tightvnc, veyon

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
x11vnc Not affected Not affected Not affected Not affected
libvncserver Not affected Not affected Fixed Fixed
vino Fixed Fixed Fixed Fixed
italc Not in release Not in release Not in release Needs evaluation
tightvnc Needs evaluation Needs evaluation Needs evaluation Needs evaluation
veyon Needs evaluation Needs evaluation Needs evaluation Not in release
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CVE-2017-18922

Medium priority

Some fixes available 4 of 25

It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a...

3 affected packages

libvncserver, veyon, x11vnc

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libvncserver Not affected Not affected Fixed Fixed
veyon Needs evaluation Needs evaluation Needs evaluation Not in release
x11vnc Not affected Not affected Not affected Not affected
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CVE-2020-14405

Medium priority

Some fixes available 3 of 25

An issue was discovered in LibVNCServer before 0.9.13. libvncclient/rfbproto.c does not limit TextChat size.

3 affected packages

veyon, x11vnc, libvncserver

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
veyon Needs evaluation Needs evaluation Needs evaluation Not in release
x11vnc Not affected Not affected Not affected Not affected
libvncserver Not affected Not affected Fixed Fixed
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CVE-2020-14404

Medium priority

Some fixes available 17 of 39

An issue was discovered in LibVNCServer before 0.9.13. libvncserver/rre.c allows out-of-bounds access via encodings.

4 affected packages

veyon, x11vnc, libvncserver, vino

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
veyon Needs evaluation Needs evaluation Needs evaluation Not in release
x11vnc Not affected Not affected Not affected Not affected
libvncserver Not affected Not affected Fixed Fixed
vino Fixed Fixed Fixed Fixed
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CVE-2020-14403

Medium priority

Some fixes available 17 of 39

An issue was discovered in LibVNCServer before 0.9.13. libvncserver/hextile.c allows out-of-bounds access via encodings.

4 affected packages

x11vnc, libvncserver, veyon, vino

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
x11vnc Not affected Not affected Not affected Not affected
libvncserver Not affected Not affected Fixed Fixed
veyon Needs evaluation Needs evaluation Needs evaluation Not in release
vino Fixed Fixed Fixed Fixed
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CVE-2020-14402

Medium priority

Some fixes available 17 of 39

An issue was discovered in LibVNCServer before 0.9.13. libvncserver/corre.c allows out-of-bounds access via encodings.

4 affected packages

libvncserver, vino, veyon, x11vnc

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libvncserver Not affected Not affected Fixed Fixed
vino Fixed Fixed Fixed Fixed
veyon Needs evaluation Needs evaluation Needs evaluation Not in release
x11vnc Not affected Not affected Not affected Not affected
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CVE-2020-14401

Medium priority

Some fixes available 3 of 25

An issue was discovered in LibVNCServer before 0.9.13. libvncserver/scale.c has a pixel_value integer overflow.

3 affected packages

veyon, x11vnc, libvncserver

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
veyon Needs evaluation Needs evaluation Needs evaluation Not in release
x11vnc Not affected Not affected Not affected Not affected
libvncserver Not affected Not affected Fixed Fixed
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