Most severe vulnerabilities for "libvnc project libvncserver" 0.9.12

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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 46

Severity

7.5

Null Pointer Dereference

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 LibvncserverBuffer Overflow

Risk 46

Severity

7.5

Buffer Overflow

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Last updated 24 July 2024

1 / 3

Source: Ubuntu

First published (updated )

CVE-2019-20839

Libvnc Project LibvncserverLast updated 24 July 2024

Risk 45

Severity

7.5

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/wsdecode.c can lead to a crash because of unaligned accesses in hybiReadAndDecode.

1 / 2

First published (updated )

CVE-2019-20840

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 LibvncserverAn issue was discovered in LibVNCServer before 0.9.13. There is an information leak (of uninitialize…

Risk 45

Severity

7.5

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

An issue was discovered in LibVNCServer before 0.9.13. There is an information leak (of uninitialized memory contents) in the libvncclient/rfbproto.c ConnectToRFBRepeater function.

1 / 2

Source: MITRE

First published (updated )

CVE-2018-21247

Libvnc Project LibvncserverLast updated 11 July 2025

Risk 35

Severity

5.4

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

5.4

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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