CVE-2026-33984

HIGHPre-NVD 7.57.5
EchelonGraph scoreLOW confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: secondary
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, in resize_vbar_entry() in libfreerdp/codec/clear.c, vBarEntry->size is updated to vBarEntry->count before the winpr_aligned_recalloc() call. If realloc fails, size is inflated while pixels still points to the old, smaller buffer. On a subsequent call where count <= size (the inflated value), realloc is skipped. The caller then writes count * bpp bytes of attacker-controlled pixel data into the undersized buffer, causing a heap buffer overflow. This issue has been patched in version 3.24.2.

CVSS v3
7.5
EG Score
7.5(low)
EPSS
31.9%
KEV
Not listed

Published

March 30, 2026

Last Modified

June 30, 2026

Advisory Details (10)

Auto-updated Jul 7, 2026
Patch available. Sources: redhat, github_commit, github.
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP So

https://access.redhat.com/errata/RHSA-2026:12388
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Serv

https://access.redhat.com/errata/RHSA-2026:12359
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.2 Advanced Update Support.

https://access.redhat.com/errata/RHSA-2026:11651
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support

https://access.redhat.com/errata/RHSA-2026:11649
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2026:11336
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.0 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:11333
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2026:11332
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2026:10709
github Patch Available

ClearCodec resize_vbar_entry() Heap OOB Write · Advisory · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8469-2xcx-frf6
github_commit

commit dc7fdb165095 (FreeRDP/FreeRDP)

Fix landed in FreeRDP/FreeRDP commit dc7fdb165095 — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/commit/dc7fdb165095139be779a4000199bc1706b06ad5

Vendor Advisories for CVE-2026-33984(5)

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

Patch Availability(14)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatfreerdp-2:2.11.7-7.el9_8.12026-05-19redhat
redhatfreerdp-2:3.10.3-12.el10_2.22026-05-19redhat
redhatfreerdp-2:2.2.0-12.el8_8.62026-04-30redhat
redhatfreerdp-2:2.2.0-7.el8_6.62026-04-30redhat
redhatfreerdp-2:2.2.0-13.el8_42026-04-29redhat
redhatfreerdp-2:2.0.0-46.rc4.el8_2.112026-04-29redhat
redhatfreerdp-2:2.4.1-3.el9_0.52026-04-28redhat
redhatfreerdp-2:2.4.1-6.el9_2.72026-04-28redhat
redhatfreerdp-2:3.10.3-3.el10_0.62026-04-28redhat
redhatfreerdp-2:2.11.2-1.el9_4.62026-04-27redhat
redhatfreerdp-2:2.11.7-1.el9_6.82026-04-22redhat
redhatfreerdp-2:2.11.7-7.el8_102026-04-20redhat
redhatfreerdp-2:2.11.7-1.el9_7.62026-04-16redhat
redhatfreerdp-2:3.10.3-5.el10_1.62026-04-16redhat

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.

Weakness Classification(2)

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

Additional Vendor Advisories

(9)

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 9× in last 7d / 15× 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. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-08 15:15 UTCEPSS rescore
  4. 2026-07-07 13:46 UTCEPSS rescore
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 16:27 UTCEPSS rescore
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-01 15:06 UTCEPSS rescore
  12. 2026-06-30 23:22 UTCEPSS rescore
  13. 2026-06-30 04:36 UTCEG score recompute
  14. 2026-06-30 04:36 UTCVendor advisory
  15. 2026-06-30 04:32 UTCNVD updatefirst tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-33984?
CVE-2026-33984 is a high vulnerability published on March 30, 2026. FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, in resizevbarentry() in libfreerdp/codec/clear.c, vBarEntry->size is updated to vBarEntry->count before the winpralignedrecalloc() call. If realloc fails, size is inflated while pixels still points to the old,…
When was CVE-2026-33984 disclosed?
CVE-2026-33984 was first published in the National Vulnerability Database on March 30, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33984 actively exploited?
CVE-2026-33984 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 31.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-33984?
CVE-2026-33984 has a CVSS v3 base score of 7.5 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-33984?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33984, 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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