CVE-2026-22855
Critical · CVSS 9.1FreeRDP — Heap out-of-bounds read (OOB read) in smartcard NDR buffer parsing
- CVSS
- 9.1
- nvd
- EPSS
- —
- KEV
- No
- Class
- oss containerizable
- CWE-125, CWE-125
Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a heap out-of-bounds read occurs in the smartcard SetAttrib path when cbAttrLen does not match the actual NDR buffer length. This vulnerability is fixed in 3.20.1.
Search profile — drives PoC discovery
Symbols SetAttribcbAttrLenNDR buffersmartcardSCardSetAttribfreerdp_smartcardsmartcard_SetAttrib
Keywords CVE-2026-22855FreeRDPheap out-of-bounds readsmartcard SetAttribcbAttrLenNDR buffer length mismatchFreeRDP 3.20.1GHSA-rwp3-g84r-6mx9
Versions: < 3.20.1
Ranked PoCs (1) — best first
Heuristic ranking — not yet expert-vetted. Scored on structure + provenance, not execution.
- ★ 0
Recall-favoring discovery; ranking by the Stage-4 scorer (Adam's rubric). Scanner/aggregator repos are hidden.
References
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rwp3-g84r-6mx9
- https://access.redhat.com/errata/RHSA-2026:19033
- https://access.redhat.com/errata/RHSA-2026:3067
- https://access.redhat.com/errata/RHSA-2026:3068
- https://access.redhat.com/errata/RHSA-2026:3334
- https://access.redhat.com/errata/RHSA-2026:3975
- https://access.redhat.com/errata/RHSA-2026:4121
- https://access.redhat.com/errata/RHSA-2026:4437
- https://access.redhat.com/errata/RHSA-2026:4438
- https://access.redhat.com/errata/RHSA-2026:4439
- https://access.redhat.com/errata/RHSA-2026:4440
Status: enriched · ingested 2026-06-30T06:00:22.000Z · profiled 2026-06-30T18:30:14.000Z