CVE-2026-33987
FreeRDP: Persistent Cache bmpSize Desync - Heap OOB Write
Reported by github_m · Published March 30, 2026
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, in persistent_cache_read_entry_v3() in libfreerdp/cache/persistent.c, persistent->bmpSize is updated before winpr_aligned_recalloc(). If realloc fails, bmpSize is inflated while bmpData points to the old buffer. This issue has been patched in version 3.24.2.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| libwinpr-devel | errata.rockylinux.org | 3.10.3-12.el10, 3.10.3-5.el10 |
| freerdp-devel | errata.rockylinux.org | 3.10.3-12.el10, 3.10.3-5.el10 |
| freerdp-libs | errata.rockylinux.org | 3.10.3-12.el10, 3.10.3-5.el10 |
| freerdp | Alpine | 3.24.2-r0 |
| freerdp-server-debuginfo | errata.rockylinux.org | 3.10.3-12.el10, 3.10.3-5.el10 |
| freerdp-server | Amazon Linux | 2:3.6.3-1.amzn2023.0.10 |
| freerdp | errata.rockylinux.org | 3.10.3-12.el10, 3.10.3-5.el10 |
| libwinpr | errata.rockylinux.org | 3.10.3-12.el10, 3.10.3-5.el10 |
| libwinpr-debuginfo | errata.rockylinux.org | 3.10.3-12.el10, 3.10.3-5.el10 |
| freerdp-libs-debuginfo | errata.rockylinux.org | 3.10.3-12.el10, 3.10.3-5.el10 |
| freerdp-debuginfo | errata.rockylinux.org | 3.10.3-12.el10, 3.10.3-5.el10 |
| freerdp-debugsource | errata.rockylinux.org | 3.10.3-12.el10, 3.10.3-5.el10 |
5 more packages have a fixed version. See every fix in Lookup.
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| FreeRDP | FreeRDP | < 3.24.2 |
| alpine | freerdp | 0 |
| amazon:2023 | freerdp-server | 0 |
| amazon:2023 | freerdp | 0 |
| amazon:2023 | freerdp-libs | 0 |
| amazon:2023 | libwinpr | 0 |
| FreeRDP | FreeRDP | 0 |
| amazon:2023 | libwinpr-devel | 0 |
| amazon:2023 | freerdp-devel | 0 |
Timeline
- Mar 25, 2026 CVE Published
- Mar 30, 2026 CVE Updated
- Mar 31, 2026 PoC Published
- Apr 14, 2026 Security Advisory (31 in total, the first dated here)
- May 12, 2026 Distribution Patch (30 in total, the first dated here)
- May 18, 2026 EPSS Score (23 in total, the first dated here)
- Jun 7, 2026 Coalition ESS Score
Query this with the API
The same record, from the CLI:
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