CVE-2026-67298

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH 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 — 3 sources updated 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

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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(high)
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 3, 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(1)

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

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 ... 3.30.0+dfsg-1~bpo13+1 (43 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.

Data Freshness Timeline

(refreshed 27× in last 7d / 81× 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.

  1. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 22:36 UTCGHSA enrichment
  3. 2026-08-20 10:32 UTCGHSA enrichment
  4. 2026-08-19 22:29 UTCEG score recompute
  5. 2026-08-19 22:29 UTCGHSA enrichment
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-19 10:25 UTCGHSA enrichment
  8. 2026-08-18 22:17 UTCEG score recompute
  9. 2026-08-18 22:17 UTCGHSA enrichment
  10. 2026-08-18 13:48 UTCEPSS rescore
  11. 2026-08-18 10:14 UTCGHSA enrichment
  12. 2026-08-17 22:10 UTCEG score recompute
  13. 2026-08-17 22:10 UTCGHSA enrichment
  14. 2026-08-17 13:47 UTCEPSS rescore
  15. 2026-08-17 10:06 UTCGHSA enrichment
  16. 2026-08-16 22:03 UTCEG score recompute
  17. 2026-08-16 22:03 UTCGHSA enrichment
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 10:00 UTCEG score recompute
  20. 2026-08-16 10:00 UTCGHSA enrichment
  21. 2026-08-15 21:57 UTCGHSA enrichment
  22. 2026-08-15 09:53 UTCEG score recompute
  23. 2026-08-15 09:53 UTCGHSA enrichment
  24. 2026-08-15 01:30 UTCEPSS rescore
  25. 2026-08-14 21:49 UTCGHSA enrichment
Show 56 more
  1. 2026-08-14 09:46 UTCEG score recompute
  2. 2026-08-14 09:46 UTCGHSA enrichment
  3. 2026-08-13 22:00 UTCEPSS rescore
  4. 2026-08-13 21:42 UTCGHSA enrichment
  5. 2026-08-13 09:38 UTCGHSA enrichment
  6. 2026-08-12 21:35 UTCEG score recompute
  7. 2026-08-12 21:35 UTCGHSA enrichment
  8. 2026-08-12 13:51 UTCEPSS rescore
  9. 2026-08-12 09:32 UTCGHSA enrichment
  10. 2026-08-11 21:28 UTCEG score recompute
  11. 2026-08-11 21:28 UTCGHSA enrichment
  12. 2026-08-11 09:25 UTCEG score recompute
  13. 2026-08-11 09:25 UTCGHSA enrichment
  14. 2026-08-11 00:00 UTCEPSS rescore
  15. 2026-08-10 21:22 UTCGHSA enrichment
  16. 2026-08-10 09:19 UTCGHSA enrichment
  17. 2026-08-09 21:15 UTCEG score recompute
  18. 2026-08-09 21:15 UTCGHSA enrichment
  19. 2026-08-09 13:47 UTCEPSS rescore
  20. 2026-08-09 09:12 UTCGHSA enrichment
  21. 2026-08-08 21:09 UTCEG score recompute
  22. 2026-08-08 21:09 UTCGHSA enrichment
  23. 2026-08-08 16:37 UTCEPSS rescore
  24. 2026-08-08 09:06 UTCGHSA enrichment
  25. 2026-08-07 21:03 UTCEG score recompute
  26. 2026-08-07 21:03 UTCGHSA enrichment
  27. 2026-08-07 08:59 UTCGHSA enrichment
  28. 2026-08-06 20:55 UTCEG score recompute
  29. 2026-08-06 20:55 UTCGHSA enrichment
  30. 2026-08-06 13:47 UTCEPSS rescore
  31. 2026-08-06 08:52 UTCGHSA enrichment
  32. 2026-08-05 20:49 UTCEG score recompute
  33. 2026-08-05 20:49 UTCGHSA enrichment
  34. 2026-08-05 19:17 UTCEPSS rescore
  35. 2026-08-05 19:17 UTCEPSS rescore
  36. 2026-08-05 08:46 UTCGHSA enrichment
  37. 2026-08-04 20:42 UTCEG score recompute
  38. 2026-08-04 20:41 UTCGHSA enrichment
  39. 2026-08-04 15:10 UTCEPSS rescore
  40. 2026-08-04 10:39 UTCEPSS rescore
  41. 2026-08-04 08:25 UTCEG score recompute
  42. 2026-08-04 08:24 UTCGHSA enrichment
  43. 2026-08-03 20:20 UTCEG score recompute
  44. 2026-08-03 20:20 UTCGHSA enrichment
  45. 2026-08-03 20:14 UTCEG score recompute
  46. 2026-08-03 20:14 UTCGHSA enrichment
  47. 2026-08-03 13:44 UTCEG score recompute
  48. 2026-08-03 13:44 UTCGHSA enrichment
  49. 2026-08-03 10:36 UTCEPSS rescore
  50. 2026-08-03 01:29 UTCGHSA enrichment
  51. 2026-08-02 13:25 UTCGHSA enrichment
  52. 2026-08-02 01:22 UTCEG score recompute
  53. 2026-08-02 01:22 UTCGHSA enrichment
  54. 2026-08-01 13:18 UTCEG score recompute
  55. 2026-08-01 12:43 UTCEG score recompute
  56. 2026-08-01 12:42 UTCMITRE cvelistV5first tracked

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 3, 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 68.6% 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-67298

Explore →

Is Your Infrastructure Affected by CVE-2026-67298?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs