Description
LibVNC commit before d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a contains a memory leak (CWE-655) in VNC server code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appear to be exploitable via network connectivity. These vulnerabilities have been fixed in commit d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Kaspersky | LibVNC | 0.9.12 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libvncserver | 0.9.12+dfsg-3 | — |
| Debian 14 | tightvnc | 1:1.3.9-9.1 | — |
| Debian 13 | libvncserver | 0.9.12+dfsg-3 | — |
| Debian 13 | tightvnc | 1:1.3.9-9.1 | — |
| Debian 12 | libvncserver | 0.9.12+dfsg-3 | — |
| Debian 12 | tightvnc | 1:1.3.9-9.1 | — |
| Debian 12 | vino | 3.22.0-6 | — |
| Debian 8 | italc | 1:2.0.2+dfsg1-2+deb8u1 | DLA-1979-1 |
| Debian 8 | libvncserver | 0.9.9+dfsg2-6.1+deb8u6 | DLA-1977-1 |
| Debian 8 | tightvnc | 1.3.9-6.5+deb8u1 | DLA-2045-1 |
| Debian 8 | vino | 3.14.0-2+deb8u1 | DLA-2014-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | krfb +2 | No fix yet | — |
| Ubuntu 26.04 LTS | krfb +2 | No fix yet | — |
| Ubuntu 25.10 | krfb +2 | No fix yet | — |
| Ubuntu 24.04 LTS | krfb +2 | No fix yet | — |
| Ubuntu 22.04 LTS | krfb +2 | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | krfb +2 | No fix yet | — |
| Ubuntu 20.04 LTS | libvncserver | 0.9.12+dfsg-9ubuntu0.1 | USN-4407-1 |
| Ubuntu 20.04 LTS | vino | 3.22.0-5ubuntu2.1 | USN-4573-1 |
| Ubuntu 18.04 LTS | italc | 1:3.0.3+dfsg1-3ubuntu0.1 | USN-4547-1 |
| Ubuntu 18.04 LTS | krfb +1 | No fix yet | — |
| Ubuntu 18.04 LTS | libvncserver | 0.9.11+dfsg-1ubuntu1.2 | USN-4407-1 |
| Ubuntu 18.04 LTS | vino | 3.22.0-3ubuntu1.1 | USN-4573-1 |
| Ubuntu 16.04 LTS | italc | 1:2.0.2+dfsg1-4ubuntu0.1 | USN-4587-1 |
| Ubuntu 16.04 LTS | krfb +1 | No fix yet | — |
| Ubuntu 16.04 LTS | libvncserver | 0.9.10+dfsg-3ubuntu0.16.04.4 | USN-4407-1 |
| Ubuntu 16.04 LTS | vino | 3.8.1-0ubuntu9.3 | USN-4573-1 |
| Ubuntu 14.04 LTS | x11vnc | No fix yet | — |
| Ubuntu Pro 14.04 LTS | tightvnc | 1.3.9-6.5+deb8u1build0.14.04.1~esm1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | LibVNCServer | 0.9.10-4.14.1 | SUSE-SU-2020:1164-2, SUSE-SU-2020:1164-1 |
| SLES 15 SP1 | vino | 3.22.0-3.6.76 | SUSE-SU-2020:2009-1 |
| SLES 12 SP5 | LibVNCServer | 0.9.9-17.19.1 | SUSE-SU-2020:1165-1 |
| SLES 12 SP5 | vino | 3.20.2-7.3.21 | SUSE-SU-2020:0955-1 |
| SLES 12 SP4 | LibVNCServer | 0.9.9-17.19.1 | SUSE-SU-2020:1165-1 |
| SLES 12 SP4 | vino | 3.20.2-7.3.21 | SUSE-SU-2020:0955-1 |
| SLES 12 SP3 | LibVNCServer | 0.9.9-17.19.1 | SUSE-SU-2020:1165-1 |
| SLES 12 SP2 | LibVNCServer | 0.9.9-17.19.1 | SUSE-SU-2020:1165-1 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | LibVNCServer | 0.9.9-17.19.1 | SUSE-SU-2020:1165-1 |
| SLES 11 SP4 | LibVNCServer | 0.9.1-160.14.1 | SUSE-SU-2020:14355-1 |
| SLES for SAP 12 SP5 | LibVNCServer | 0.9.9-17.19.1 | SUSE-SU-2020:1165-1 |
| SLES for SAP 12 SP5 | vino | 3.20.2-7.3.21 | SUSE-SU-2020:0955-1 |
| SLES for SAP 12 SP4 | LibVNCServer | 0.9.9-17.19.1 | SUSE-SU-2020:1165-1 |
| SLES for SAP 12 SP4 | vino | 3.20.2-7.3.21 | SUSE-SU-2020:0955-1 |
| SLES for SAP 12 SP3 | LibVNCServer | 0.9.9-17.19.1 | SUSE-SU-2020:1165-1 |
| SLES for SAP 12 SP2 | LibVNCServer | 0.9.9-17.19.1 | SUSE-SU-2020:1165-1 |
| SLES for SAP 12 SP1 | LibVNCServer | 0.9.9-17.19.1 | SUSE-SU-2020:1165-1 |
| SUSE OpenStack Cloud Crowbar 8 | LibVNCServer | 0.9.9-17.19.1 | SUSE-SU-2020:1165-1 |
| SUSE OpenStack Cloud 8 | LibVNCServer | 0.9.9-17.19.1 | SUSE-SU-2020:1165-1 |
| SUSE OpenStack Cloud 7 | LibVNCServer | 0.9.9-17.19.1 | SUSE-SU-2020:1165-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | LibVNCServer | 0.9.1-160.14.1 | SUSE-SU-2020:14355-1 |
| SUSE HPE Helion OpenStack 8 | LibVNCServer | 0.9.9-17.19.1 | SUSE-SU-2020:1165-1 |
| SUSE Enterprise Storage 5 | LibVNCServer | 0.9.9-17.19.1 | SUSE-SU-2020:1165-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | vino | 3.22.0-7.9 | openSUSE-SU-2024:11498-1 |
| openSUSE Leap 15.1 | LibVNCServer | 0.9.10-lp151.7.3.1 | openSUSE-SU-2020:0624-1 |
| openSUSE Leap 15.1 | vino | 3.22.0-lp151.4.3.1 | openSUSE-SU-2020:1071-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libvncserver | 0.9.12-r1 | — |
| Alpine v3.23 | libvncserver | 0.9.12-r1 | — |
| Alpine v3.22 | libvncserver | 0.9.12-r1 | — |
| Alpine v3.21 | libvncserver | 0.9.12-r1 | — |
| Alpine v3.20 | libvncserver | 0.9.12-r1 | — |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | libvncserver | 0.9.12-r1 | — |
| Alpine v3.18 | libvncserver | 0.9.12-r1 | — |
| Alpine v3.17 | libvncserver | 0.9.12-r1 | — |
| Alpine v3.16 | libvncserver | 0.9.12-r1 | — |
| Alpine v3.15 | libvncserver | 0.9.12-r1 | — |
| Alpine v3.14 | libvncserver | 0.9.12-r1 | — |
| Alpine v3.13 | libvncserver | 0.9.12-r1 | — |
| Alpine v3.12 | libvncserver | 0.9.12-r1 | — |
| Alpine v3.11 | libvncserver | 0.9.12-r1 | — |
| Alpine v3.10 | libvncserver | 0.9.11-r3 | — |
| Alpine v3.9 | libvncserver | 0.9.11-r3 | — |
| Alpine v3.8 | libvncserver | 0.9.11-r3 | — |
| Alpine v3.7 | libvncserver | 0.9.11-r3 | — |
Advisories 19
- USN-4547-1 italc vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-4587-1 italc vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-4573-1 vino vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-4407-1 libvncserver vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-2014-1 vino - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2045-1 tightvnc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1977-1 libvncserver - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1979-1 italc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:14355-1 Security update for LibVNCServer SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0955-1 Security update for vino SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1165-1 Security update for LibVNCServer SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11498-1 vino-3.22.0-7.9 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2009-1 Security update for vino SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1071-1 Security update for vino SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0624-1 Security update for LibVNCServer SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1164-1 Security update for LibVNCServer SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1164-2 Security update for LibVNCServer SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-21-350-12 Siemens SIMATIC ITC CISA ICS & IT advisories · May 6, 2025
- SSA-390195 SSA-390195: LibVNC Vulnerabilities in SIMATIC ITC Products Siemens ProductCERT · Dec 14, 2021
References
- https://github.com/LibVNC/libvncserver/commit/d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a
- [debian-lts-announce] 20191030 [SECURITY] [DLA 1977-1] libvncserver security update mailing-list
- [debian-lts-announce] 20191030 [SECURITY] [DLA 1979-1] italc security update mailing-list
- [debian-lts-announce] 20191129 [SECURITY] [DLA 2014-1] vino security update mailing-list
- [debian-lts-announce] 20191221 [SECURITY] [DLA 2045-1] tightvnc security update mailing-list
- openSUSE-SU-2020:0624 vendor-advisory
- USN-4407-1 vendor-advisory
- openSUSE-SU-2020:1071 vendor-advisory
- USN-4547-1 vendor-advisory
- USN-4573-1 vendor-advisory
- USN-4587-1 vendor-advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf