CVE-2026-67298

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-01. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

A fix is available — apply it.

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_EnsureRemainingCapacity() capacity check (due to pointer arithmetic wraparound) and is then passed to WTSVirtualChannelRead(), resulting in an out-of-bounds heap write. A malicious or compromised RDP client can exploit this to corrupt the heap and crash the server. Fixed in FreeRDP 3.29.0.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

August 1, 2026

Last Modified

August 31, 2026

Advisory Details (4)

Auto-updated Aug 1, 2026
Patch available. Sources: github, github_commit.
generic

FreeRDP 3.28.0 Heap Buffer Overflow via RAIL orderLength Underflow | Advisories | VulnCheck

https://www.vulncheck.com/advisories/freerdp-heap-buffer-overflow-via-rail-orderlength-underflow
github_commit

commit 46848765f2a1 (FreeRDP/FreeRDP)

Fix landed in FreeRDP/FreeRDP commit 46848765f2a1 — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/commit/46848765f2a1134f8652f8760eefb5e85d64a9b8
github_commit

commit 5370fb26fbf0 (FreeRDP/FreeRDP)

Fix landed in FreeRDP/FreeRDP commit 5370fb26fbf0 — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/commit/5370fb26fbf034ecd11d3026b6ad639b5fff493f
github Patch Available

FreeRDP RAIL server orderLength underflow can cause heap-buffer-overflow · Advisory · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qmvw-52ph-q5pv

Vendor Advisories for CVE-2026-67298(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatfreerdp-2:3.10.3-3.el10_0.162026-09-17redhat
redhatfreerdp-0:2.1.1-5.el7_9.122026-09-17redhat
redhatfreerdp-2:3.10.3-12.el10_2.102026-08-31redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
freerdp22.10.0+dfsg1-1 ... 2.9.0+dfsg1-1~bpo11+1 (32 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
freerdp22.10.0+dfsg1-1 ... 2.11.7+dfsg1-6~deb12u1 (13 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
freerdp33.15.0+dfsg-2.1 ... 3.31.0+dfsg-1 (44 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
freerdp33.15.0+dfsg-2.1 ... 3.28.0+dfsg-2 (37 versions)3.29.0+dfsg-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 31× in last 7d / 121× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 199 total refreshes for this CVE.

  1. 2026-09-19 03:56 UTCEG score recompute
  2. 2026-09-19 03:56 UTCVendor advisory
  3. 2026-09-19 03:56 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 13:20 UTCVendor advisory
  6. 2026-09-18 13:20 UTCGHSA enrichment
  7. 2026-09-18 01:14 UTCEG score recompute
  8. 2026-09-18 01:14 UTCVendor advisory
  9. 2026-09-18 01:14 UTCGHSA enrichment
  10. 2026-09-17 01:21 UTCEG score recompute
  11. 2026-09-17 01:21 UTCVendor advisory
  12. 2026-09-17 01:21 UTCGHSA enrichment
  13. 2026-09-16 14:08 UTCEPSS rescore
  14. 2026-09-16 05:23 UTCEG score recompute
  15. 2026-09-16 05:23 UTCVendor advisory
  16. 2026-09-16 05:23 UTCGHSA enrichment
  17. 2026-09-16 05:15 UTCEPSS rescore
  18. 2026-09-15 02:53 UTCVendor advisory
  19. 2026-09-15 02:53 UTCGHSA enrichment
  20. 2026-09-14 08:47 UTCVendor advisory
  21. 2026-09-14 08:47 UTCGHSA enrichment
  22. 2026-09-13 20:43 UTCEG score recompute
  23. 2026-09-13 20:43 UTCVendor advisory
  24. 2026-09-13 20:43 UTCGHSA enrichment
  25. 2026-09-13 08:39 UTCVendor advisory
Show 75 more
  1. 2026-09-13 08:39 UTCGHSA enrichment
  2. 2026-09-12 20:33 UTCEG score recompute
  3. 2026-09-12 20:33 UTCVendor advisory
  4. 2026-09-12 20:33 UTCGHSA enrichment
  5. 2026-09-12 08:28 UTCVendor advisory
  6. 2026-09-12 08:28 UTCGHSA enrichment
  7. 2026-09-11 20:24 UTCEG score recompute
  8. 2026-09-11 20:24 UTCVendor advisory
  9. 2026-09-11 20:24 UTCGHSA enrichment
  10. 2026-09-11 14:53 UTCEPSS rescore
  11. 2026-09-11 09:37 UTCEPSS rescore
  12. 2026-09-11 07:56 UTCVendor advisory
  13. 2026-09-11 07:56 UTCGHSA enrichment
  14. 2026-09-10 19:52 UTCEG score recompute
  15. 2026-09-10 19:52 UTCVendor advisory
  16. 2026-09-10 19:52 UTCGHSA enrichment
  17. 2026-09-10 07:48 UTCVendor advisory
  18. 2026-09-10 07:48 UTCGHSA enrichment
  19. 2026-09-09 19:44 UTCVendor advisory
  20. 2026-09-09 19:44 UTCGHSA enrichment
  21. 2026-09-09 06:56 UTCEG score recompute
  22. 2026-09-09 06:56 UTCVendor advisory
  23. 2026-09-09 06:56 UTCGHSA enrichment
  24. 2026-09-08 22:01 UTCEPSS rescore
  25. 2026-09-07 19:13 UTCEG score recompute
  26. 2026-09-07 19:13 UTCVendor advisory
  27. 2026-09-07 19:13 UTCGHSA enrichment
  28. 2026-09-07 16:01 UTCEPSS rescore
  29. 2026-09-06 18:50 UTCEG score recompute
  30. 2026-09-06 18:50 UTCVendor advisory
  31. 2026-09-06 18:50 UTCGHSA enrichment
  32. 2026-09-06 13:47 UTCEPSS rescore
  33. 2026-09-06 06:46 UTCVendor advisory
  34. 2026-09-06 06:46 UTCGHSA enrichment
  35. 2026-09-05 18:43 UTCEG score recompute
  36. 2026-09-05 18:43 UTCVendor advisory
  37. 2026-09-05 18:43 UTCGHSA enrichment
  38. 2026-09-05 15:31 UTCEPSS rescore
  39. 2026-09-05 04:36 UTCEG score recompute
  40. 2026-09-05 04:36 UTCVendor advisory
  41. 2026-09-05 04:36 UTCGHSA enrichment
  42. 2026-09-04 10:25 UTCEG score recompute
  43. 2026-09-04 10:25 UTCVendor advisory
  44. 2026-09-04 10:25 UTCGHSA enrichment
  45. 2026-09-04 05:07 UTCEPSS rescore
  46. 2026-09-03 21:09 UTCVendor advisory
  47. 2026-09-03 21:09 UTCGHSA enrichment
  48. 2026-09-03 09:02 UTCEG score recompute
  49. 2026-09-03 09:02 UTCVendor advisory
  50. 2026-09-03 09:02 UTCGHSA enrichment
  51. 2026-09-02 14:12 UTCEPSS rescore
  52. 2026-09-01 22:23 UTCEG score recompute
  53. 2026-09-01 22:23 UTCVendor advisory
  54. 2026-09-01 22:23 UTCGHSA enrichment
  55. 2026-09-01 13:54 UTCEPSS rescore
  56. 2026-09-01 04:40 UTCEPSS rescore
  57. 2026-08-31 20:46 UTCEG score recompute
  58. 2026-08-31 20:46 UTCGHSA enrichment
  59. 2026-08-30 22:19 UTCEG score recompute
  60. 2026-08-30 22:19 UTCGHSA enrichment
  61. 2026-08-30 19:17 UTCEPSS rescore
  62. 2026-08-30 10:15 UTCEG score recompute
  63. 2026-08-30 10:15 UTCGHSA enrichment
  64. 2026-08-30 01:22 UTCEPSS rescore
  65. 2026-08-29 22:12 UTCEG score recompute
  66. 2026-08-29 22:11 UTCGHSA enrichment
  67. 2026-08-28 21:42 UTCEPSS rescore
  68. 2026-08-27 23:45 UTCEG score recompute
  69. 2026-08-27 23:45 UTCGHSA enrichment
  70. 2026-08-27 11:36 UTCGHSA enrichment
  71. 2026-08-26 23:32 UTCEG score recompute
  72. 2026-08-26 23:32 UTCGHSA enrichment
  73. 2026-08-26 14:47 UTCEPSS rescore
  74. 2026-08-26 11:28 UTCGHSA enrichment
  75. 2026-08-25 23:22 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-67298?
CVE-2026-67298 is a high vulnerability published on August 1, 2026. FreeRDP versions 3.28.0 and earlier contain a heap buffer overflow in the server-side RAIL channel handler (railserverhandlemessages() in channels/rail/server/railmain.c). When processing a RAIL PDU header, the code subtracts RAILPDUHEADERLENGTH from the peer-controlled orderLength field without…
When was CVE-2026-67298 disclosed?
CVE-2026-67298 was first published in the National Vulnerability Database on August 1, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67298 actively exploited?
CVE-2026-67298 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 68.5% of all scored CVEs.
What is the CVSS score of CVE-2026-67298?
CVE-2026-67298 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-67298?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67298, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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