libvncserver: LibVNCServer versions 0.9.15 and prior (fixed in commit dc78dee) contain null pointer dereference vulnerabilities in...
CVE-2026-32854 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-32854, released March 24, 2026. It is not reported as exploited. Patch Radar priority: High.
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 service by sending specially crafted HTTP requests. Attackers can exploit missing validation of strchr() return values in the CONNECT and GET proxy handling paths to trigger null pointer dereferences and crash the server when httpd and proxy features are enabled.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| LibVNCServer · opensuse-leap 15.6 | 0.9.14-150600.3.6.1 | SUSE-SU-2026:1173-1 | Apr 2, 2026 |
| LibVNCServer · opensuse-leap 16.0 | 0.9.14-160000.4.1 | OPENSUSE-SU-2026:20552-1 | Apr 16, 2026 |
| LibVNCServer · sles 15.7 | 0.9.14-150600.3.6.1 | SUSE-SU-2026:1173-1 | Apr 2, 2026 |
| LibVNCServer · sles 16.0 | 0.9.14-160000.4.1 | SUSE-SU-2026:21206-1 | Apr 16, 2026 |
| libvncclient1 · Ubuntu 22.04.1 LTS (jammy) | 0.9.13+dfsg-3ubuntu0.1 | libvncclient1 0.9.13+dfsg-3ubuntu0.1 | Jun 24, 2026 |
| libvncclient1 · Ubuntu 24.04.5 LTS (noble) | 0.9.14+dfsg-1ubuntu0.1 | libvncclient1 0.9.14+dfsg-1ubuntu0.1 | Jun 24, 2026 |
| libvncclient1 · Ubuntu 25.10 (questing) | 0.9.15+dfsg-1ubuntu0.1 | libvncclient1 0.9.15+dfsg-1ubuntu0.1 | Jun 24, 2026 |
| libvncserver · Debian 12.15 (bookworm) | 0.9.14+dfsg-1+deb12u1 | DEBIAN-CVE-2026-32854 | Mar 24, 2026 |
| libvncserver · Debian 13.5 (trixie) | 0.9.15+dfsg-1+deb13u1 | DEBIAN-CVE-2026-32854 | Mar 24, 2026 |
| libvncserver · Debian 14 | 0.9.15+dfsg-3 | DEBIAN-CVE-2026-32854 | Mar 24, 2026 |
| libvncserver1 · Ubuntu 22.04.1 LTS (jammy) | 0.9.13+dfsg-3ubuntu0.1 | libvncserver1 0.9.13+dfsg-3ubuntu0.1 | Jun 24, 2026 |
| libvncserver1 · Ubuntu 24.04.5 LTS (noble) | 0.9.14+dfsg-1ubuntu0.1 | libvncserver1 0.9.14+dfsg-1ubuntu0.1 | Jun 24, 2026 |
| libvncserver1 · Ubuntu 25.10 (questing) | 0.9.15+dfsg-1ubuntu0.1 | libvncserver1 0.9.15+dfsg-1ubuntu0.1 | Jun 24, 2026 |
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