CVE-2026-112278 (GCVE-0-2026-112278)

Vulnerability from cvelistv5 – Published: 2026-10-19 13:55 – Updated: 2026-10-19 13:55 Unsupported When Assigned
VLAI
Title
rdesktop through 1.9.0 Heap Out-of-Bounds Read via process_raw_bmpcache
Summary
rdesktop through 1.9.0 contains a heap out-of-bounds read vulnerability in process_raw_bmpcache() in orders.c that allows malicious RDP servers to crash clients. Attackers can send a raw bitmap cache order declaring large width, height, and bpp values with a tiny payload, causing memcpy() to read past the receive buffer and crash the client.
Severity
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6503 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
rdesktop rdesktop Affected: 0 , ≤ 1.9.0 (custom)
    cpe:2.3:a:rdesktop:rdesktop:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-09-25 10:57
Credits
HaiND from the Post and Telecommunication Institute of Technology
Show details on NVD website
To clipboard 

{
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        {
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          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/rdesktop/rdesktop",
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              "status": "affected",
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        }
      ],
      "metrics": [
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            "userInteraction": "REQUIRED",
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            "version": "3.1"
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      ],
      "problemTypes": [
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          "descriptions": [
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              "description": "Out-of-bounds Read",
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      "providerMetadata": {
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        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
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      "references": [
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          "tags": [
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          ],
          "url": "https://hackmd.io/@haindpwn/rdesktop-bitmap-decompress-oob-read"
        },
        {
          "tags": [
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            "issue-tracking"
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          "url": "https://github.com/rdesktop/rdesktop/pull/437"
        },
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          "tags": [
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          "url": "https://github.com/rdesktop/rdesktop/blob/v1.9.0/orders.c"
        },
        {
          "name": "VulnCheck Advisory: rdesktop through 1.9.0 Heap Out-of-Bounds Read via process_raw_bmpcache",
          "tags": [
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          "url": "https://www.vulncheck.com/advisories/rdesktop-through-1.9.0-heap-out-of-bounds-read-via-process-raw-bmpcache"
        }
      ],
      "tags": [
        "unsupported-when-assigned"
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      "title": "rdesktop through 1.9.0 Heap Out-of-Bounds Read via process_raw_bmpcache",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-112278",
    "datePublished": "2026-10-19T13:55:24.239Z",
    "dateReserved": "2026-10-19T13:25:29.896Z",
    "dateUpdated": "2026-10-19T13:55:24.239Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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                "defaultStatus": "unaffected",
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            "tags": [
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          }
        ],
        "descriptions": [
          {
            "lang": "en",
            "value": "rdesktop through 1.9.0 contains a heap out-of-bounds read vulnerability in process_raw_bmpcache() in orders.c that allows malicious RDP servers to crash clients. Attackers can send a raw bitmap cache order declaring large width, height, and bpp values with a tiny payload, causing memcpy() to read past the receive buffer and crash the client."
          }
        ],
        "id": "CVE-2026-112278",
        "lastModified": "2026-10-19T21:14:14.150",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 6.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
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                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
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              "type": "Primary"
            }
          ],
          "cvssMetricV40": [
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                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "availabilityRequirement": "NOT_DEFINED",
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                "baseSeverity": "HIGH",
                "confidentialityRequirement": "NOT_DEFINED",
                "exploitMaturity": "NOT_DEFINED",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "PASSIVE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
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                "vulnerabilityResponseEffort": "NOT_DEFINED"
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        "references": [
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            "url": "https://github.com/rdesktop/rdesktop/pull/437"
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            "source": "disclosure@vulncheck.com",
            "url": "https://hackmd.io/@haindpwn/rdesktop-bitmap-decompress-oob-read"
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-19T18:02:52+00:00",
      "cve": "CVE-2026-112278",
      "id": "CVE-2026-112278",
      "initial_release_date": "2026-10-19T13:55:24.239000+00:00",
      "product_status:known_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "rdesktop: rdesktop: Denial of Service via heap out-of-bounds read in process_raw_bmpcache",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-112278.json",
      "version": "3"
    }
  }
}



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