Description
LibVNC before commit a83439b9fbe0f03c48eb94ed05729cb016f8b72f contains multiple heap out-of-bound write vulnerabilities in VNC client code that can result remote code execution
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | LibVNC | commit a83439b9fbe0f03c48eb94ed05729cb016f8b72f | — |
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 | 0.9.11+dfsg-1.2 | — |
| Debian 13 | libvncserver | 0.9.11+dfsg-1.2 | — |
| Debian 12 | libvncserver | 0.9.11+dfsg-1.2 | — |
| Debian 9 | libvncserver | 0.9.11+dfsg-1.3~deb9u1 | DSA-4383-1 |
| Debian 8 | italc | 1:2.0.2+dfsg1-2+deb8u1 | DLA-1979-1 |
| Debian 8 | libvncserver | 0.9.9+dfsg2-6.1+deb8u4 | DLA-1617-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | italc | 1:3.0.3+dfsg1-3ubuntu0.1 | USN-4547-1 |
| Ubuntu 18.04 LTS | libvncserver | 0.9.11+dfsg-1ubuntu1.1 | USN-3877-1 |
| Ubuntu 16.04 LTS | italc | 1:2.0.2+dfsg1-4ubuntu0.1 | USN-4587-1 |
| Ubuntu 16.04 LTS | libvncserver | 0.9.10+dfsg-3ubuntu0.16.04.3 | USN-3877-1 |
| Ubuntu 14.04 LTS | libvncserver | 0.9.9+dfsg-1ubuntu1.4 | USN-3877-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | LibVNCServer | 0.9.10-4.3.1 | SUSE-SU-2019:0080-1 |
| SLES 12 SP4 | LibVNCServer | 0.9.9-17.8.1 | SUSE-SU-2019:0060-1 |
| SLES 12 SP3 | LibVNCServer | 0.9.9-17.8.1 | SUSE-SU-2019:0060-1 |
| SLES 12 SP2 | LibVNCServer | 0.9.9-17.8.1 | SUSE-SU-2019:0060-1 |
| SLES 12 SP1 | LibVNCServer | 0.9.9-17.8.1 | SUSE-SU-2019:0060-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | LibVNCServer | 0.9.9-17.8.1 | SUSE-SU-2019:0060-1 |
| SLES 11 SP4 | LibVNCServer | 0.9.1-160.6.1 | SUSE-SU-2019:13927-1 |
| SLES 11 SP3 | LibVNCServer | 0.9.1-160.6.1 | SUSE-SU-2019:13927-1 |
| SLES for SAP 12 SP4 | LibVNCServer | 0.9.9-17.8.1 | SUSE-SU-2019:0060-1 |
| SLES for SAP 12 SP3 | LibVNCServer | 0.9.9-17.8.1 | SUSE-SU-2019:0060-1 |
| SLES for SAP 12 SP2 | LibVNCServer | 0.9.9-17.8.1 | SUSE-SU-2019:0060-1 |
| SLES for SAP 12 SP1 | LibVNCServer | 0.9.9-17.8.1 | SUSE-SU-2019:0060-2 |
| SLES for SAP 11 SP4 | LibVNCServer | 0.9.1-160.6.1 | SUSE-SU-2019:13927-1 |
| SUSE OpenStack Cloud 7 | LibVNCServer | 0.9.9-17.8.1 | SUSE-SU-2019:0060-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | LibVNCServer | 0.9.1-160.6.1 | SUSE-SU-2019:13927-1 |
| SUSE Enterprise Storage 4 | LibVNCServer | 0.9.9-17.8.1 | SUSE-SU-2019:0060-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.0 | LibVNCServer | 0.9.10-lp150.3.3.1 | openSUSE-SU-2019:0053-1 |
Advisories 13
- 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-3877-1 libvncserver vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-4383-1 libvncserver - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1979-1 italc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1617-1 libvncserver - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2019:0053-1 Security update for LibVNCServer SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:13927-1 Security update for LibVNCServer SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0060-2 Security update for LibVNCServer SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0080-1 Security update for LibVNCServer SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0060-1 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
- DSA-4383 vendor-advisory
- [debian-lts-announce] 20181227 [SECURITY] [DLA 1617-1] libvncserver security update mailing-list
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-029-libvnc-multiple-heap-out-of-bound-vulnerabilities/
- USN-3877-1 vendor-advisory
- GLSA-201908-05 vendor-advisory
- [debian-lts-announce] 20191030 [SECURITY] [DLA 1979-1] italc security update mailing-list
- USN-4547-1 vendor-advisory
- USN-4587-1 vendor-advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf