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.
Metrics
Affected Vendors & Products
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Fixes
Solution
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Workaround
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References
History
Tue, 31 Mar 2026 03:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | FreeRDP: ClearCodec resize_vbar_entry() Heap OOB Write | |
| Weaknesses | CWE-122 CWE-131 |
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cvssV3_1
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Projects
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-03-30T21:42:57.090Z
Reserved: 2026-03-24T22:20:06.211Z
Link: CVE-2026-33984
Vulnrichment
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NVD
Status : Received
Published: 2026-03-30T22:16:19.567
Modified: 2026-03-30T22:16:19.567
Link: CVE-2026-33984
Redhat
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OpenCVE Enrichment
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