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DEBIAN-CVE-2026-32854

Type: advisorySource: OSV1 source record

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.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-32854

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-32854

libvncserver

Source reference: /affected/0/package/name

Affected versions
0.9.14+dfsg-1

Source reference: /affected/0/versions

Fixed versions
0.9.14+dfsg-1+deb12u1

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

libvncserver

Source reference: /affected/1/package/name

Affected versions
0.9.15+dfsg-1

Source reference: /affected/1/versions

Fixed versions
0.9.15+dfsg-1+deb13u1

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

libvncserver

Source reference: /affected/2/package/name

Affected versions
0.9.15+dfsg-1

Source reference: /affected/2/versions

0.9.15+dfsg-2

Source reference: /affected/2/versions

Fixed versions
0.9.15+dfsg-3

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0.9.14+dfsg-1+deb12u1"
          }
        ]
      }
    ],
    "package": {
      "name": "libvncserver",
      "purl": "pkg:deb/debian/libvncserver?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "0.9.14+dfsg-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-32854.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0.9.15+dfsg-1+deb13u1"
          }
        ]
      }
    ],
    "package": {
      "name": "libvncserver",
      "purl": "pkg:deb/debian/libvncserver?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "0.9.15+dfsg-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-32854.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0.9.15+dfsg-3"
          }
        ]
      }
    ],
    "package": {
      "name": "libvncserver",
      "purl": "pkg:deb/debian/libvncserver?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "0.9.15+dfsg-1",
      "0.9.15+dfsg-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-32854.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56756 · Revision 1
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Publisher date
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