Double Free Affecting freerdp/freerdp package, versions [,3.32.0)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-FREERDPFREERDP-20848909
- published13 Oct 2026
- disclosed12 Oct 2026
- creditkimaiden1984-boop
Introduced: 12 Oct 2026
NewCVE-2026-109257 (opens in a new tab)How to fix?
Upgrade freerdp/freerdp to version 3.32.0 or higher.
Overview
Affected versions of this package are vulnerable to Double Free via nsc_context_initialize_encode() in libfreerdp/codec/nsc_encode.c, which grows five aligned plane buffers sequentially and immediately publishes each successful replacement into the context. When a later allocation in the loop fails, the error path frees every plane buffer without setting the stored pointers to NULL or restoring a coherent previous state. Subsequent context teardown via nsc_context_free() calls winpr_aligned_free() on the already-freed (dangling) plane pointers, causing a double free and crashing the server with SIGSEGV. A remote client can trigger this by negotiating NSCodec and requesting a desktop geometry that causes a partial plane-buffer growth failure under bounded server memory.