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Libvnc Project LibvncserverGHSL-2020-064: integer overflow in LibVNCClient HandleCursorShape resulting in remote heap overflow - CVE-2019-20788

Risk 88
Severity
9.8
Integer Overflow, Buffer Overflow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Last updated 18 August 2025

1 / 3
Source: Ubuntu
First published (updated )
CVE-2019-20788

redhat/libvncserverNull Pointer Dereference

Risk 45
Severity
7.5
Null Pointer Dereference
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

An issue was discovered in LibVNCServer before 0.9.13. libvncserver/rfbregion.c has a NULL pointer dereference.

1 / 3
Source: Launchpad
First published (updated )
CVE-2020-14397

Libvnc Project LibvncserverNull Pointer Dereference

Risk 45
Severity
7.5
Null Pointer Dereference
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

An issue was discovered in LibVNCServer before 0.9.13. libvncclient/tlsopenssl.c has a NULL pointer dereference.

1 / 2
Source: Launchpad
First published (updated )
CVE-2020-14396

Libvnc Project LibvncserverLast updated 11 July 2025

Risk 45
Severity
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

An issue was discovered in LibVNCServer before 0.9.13. An improperly closed TCP connection causes an infinite loop in libvncclient/sockets.c.

1 / 2
Source: Launchpad
First published (updated )
CVE-2020-14398

Libvnc Project LibvncserverLast updated 11 July 2025

Risk 35
Severity
5.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

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

1 / 2
Source: Launchpad
First published (updated )
CVE-2020-14402

Libvnc Project LibvncserverLast updated 11 July 2025

Risk 35
Severity
5.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

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

1 / 2
Source: Launchpad
First published (updated )
CVE-2020-14403

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