CVE-2026-32854
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Mixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 0.9.15+dfsg-1+deb13u1 |
| sid | Fixed | 0.9.15+dfsg-3 |
| forky | Fixed | 0.9.15+dfsg-3 |
| bullseye | Affected | — |
| bookworm | Fixed | 0.9.14+dfsg-1+deb12u1 |
Ubuntu Fixed 4 releases
| Version | Status | Fixed in |
|---|---|---|
| resolute | Fixed | 0.9.15+dfsg-3ubuntu0.1 |
| questing | Fixed | 0.9.15+dfsg-1ubuntu0.1 |
| noble | Fixed | 0.9.14+dfsg-1ubuntu0.1 |
| jammy | Fixed | 0.9.13+dfsg-3ubuntu0.1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| libvncserver_project | libvncserver | {"endExcluding":"0.9.15"} | 0.9.15 |
References
- https://security-tracker.debian.org/tracker/CVE-2026-32854
- https://www.suse.com/security/cve/CVE-2026-32854.html
- https://ubuntu.com/security/notices/USN-8463-1
- https://github.com/LibVNC/libvncserver/commit/dc78dee51a7e270e537a541a17befdf2073f5314
- https://github.com/LibVNC/libvncserver/security/advisories/GHSA-xjp8-4qqv-5x4x
- https://www.vulncheck.com/advisories/libvncserver-httpd-proxy-null-pointer-dereference
CWEs
CWE-476
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.