Client memory over-read via undersized header bounds checks
Published Apr 23, 2024 · Updated Nov 3, 2025
Out-of-bounds read in FreeRDP clients before 3.5.1 allows remote attackers to trigger invalid memory reads via crafted RDP bitmap data. In libfreerdp/codec/interleaved.c, ExtractRunLengthRegularFgBg and ExtractRunLengthMegaMega checked for one and two remaining header bytes, respectively, before consuming two and three. The issue is reached when a client parses a truncated interleaved bitmap run-length header from an RDP server; the vendor has not documented a more specific consequence than an out-of-bounds read.
Summary
What happened
Out-of-bounds read in FreeRDP clients before 3.5.1 allows remote attackers to trigger invalid memory reads via crafted RDP bitmap data. In libfreerdp/codec/interleaved.c, ExtractRunLengthRegularFgBg and ExtractRunLengthMegaMega checked for one and two remaining header bytes, respectively, before consuming two and three. The issue is reached when a client parses a truncated interleaved bitmap run-length header from an RDP server; the vendor has not documented a more specific consequence than an out-of-bounds read.
The record
- CVE
- CVE-2024-32658
- Published
- Apr 23, 2024
- Updated
- Nov 3, 2025
- Vendor
- FreeRDP
- Product
- FreeRDP
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 23, 2024CVE publishedPublication date reported by the CVE source.
- Nov 3, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <3.5.1
- Affected versionversion=< 3.5.1
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What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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Your stack
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