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CVE-2026-67298

FreeRDP versions 3.28.0 and earlier contain a heap buffer overflow in the server-side RAIL channel handler (rail_server_handle_messages() in channels/rail/server/rail_main.c). When processing a RAIL PDU header, the code subtracts RAIL_PDU_HEADER_LENGTH from the peer-controlled orderLength field without first verifying orderLength is at least the header length. For orderLength values 0..3 this causes an unsigned integer underflow to a very large size, which bypasses the Stream_EnsureRemainingCapa
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:544f3399debfdcdaf4fe43baef5f904bb11914193d70f365afc53bf02d9fa07f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:87ea543d2ed4c87d9f7829c8a6af55a81be94dee8138c01fc9a6c80fddb370c9 · sha256:0897cdc8b9bfc427… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:87ea543d2ed4c87d9f7829c8a6af55a81be94dee8138c01fc9a6c80fddb370c9 · sha256:0897cdc8b9bfc427… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"FreeRDP","vendor":"FreeRDP","versions":[{"lessThan":"3.29.0","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"3.29.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:87ea543d2ed4c87d9f7829c8a6af55a81be94dee8138c01fc9a6c80fddb370c9 · sha256:0897cdc8b9bfc427… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:87ea543d2ed4c87d9f7829c8a6af55a81be94dee8138c01fc9a6c80fddb370c9 · sha256:0897cdc8b9bfc427… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:87ea543d2ed4c87d9f7829c8a6af55a81be94dee8138c01fc9a6c80fddb370c9 · sha256:0897cdc8b9bfc427… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-191","description":"Integer Underflow (Wrap or Wraparound)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:87ea543d2ed4c87d9f7829c8a6af55a81be94dee8138c01fc9a6c80fddb370c9 · sha256:0897cdc8b9bfc427… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"name":"Patch Commit","tags":["patch"],"url":"https://github.com/FreeRDP/FreeRDP/commit/46848765f2a1134f8652f8760eefb5e85d64a9b8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:87ea543d2ed4c87d9f7829c8a6af55a81be94dee8138c01fc9a6c80fddb370c9 · sha256:0897cdc8b9bfc427… · /containers/cna/references/2
{"name":"Patch Commit","tags":["patch"],"url":"https://github.com/FreeRDP/FreeRDP/commit/5370fb26fbf034ecd11d3026b6ad639b5fff493f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:87ea543d2ed4c87d9f7829c8a6af55a81be94dee8138c01fc9a6c80fddb370c9 · sha256:0897cdc8b9bfc427… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5wr6-8m8j-3h7f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:87ea543d2ed4c87d9f7829c8a6af55a81be94dee8138c01fc9a6c80fddb370c9 · sha256:0897cdc8b9bfc427… · /containers/adp/0/references/0
{"name":"GitHub Security Advisory (GHSA-qmvw-52ph-q5pv)","tags":["vendor-advisory"],"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qmvw-52ph-q5pv"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:87ea543d2ed4c87d9f7829c8a6af55a81be94dee8138c01fc9a6c80fddb370c9 · sha256:0897cdc8b9bfc427… · /containers/cna/references/0
{"name":"VulnCheck Advisory: FreeRDP 3.28.0 Heap Buffer Overflow via RAIL orderLength Underflow","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/freerdp-heap-buffer-overflow-via-rail-orderlength-underflow"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:87ea543d2ed4c87d9f7829c8a6af55a81be94dee8138c01fc9a6c80fddb370c9 · sha256:0897cdc8b9bfc427… · /containers/cna/references/3

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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