CVE-2026-23530 | BDVDB-2026-311191 Detail
FreeRDPFreeRDP
Description#
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0,`freerdp_bitmap_decompress_planar` does not validate `nSrcWidth`/`nSrcHeight` against `planar->maxWidth`/`maxHeight` before RLE decode. A malicious server can trigger a client‑side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.
Impact#
Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact high. Attack vector: network.
Weaknesses#
- CWE-122 Heap-based Buffer Overflow
References#
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-r4hv-852m-fq7p
- https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/planar.c#L1689-L1696
- https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/planar.c#L1713-L1716
- https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/planar.c#L951-L953
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0
- https://access.redhat.com/security/cve/CVE-2026-23530
- https://bugzilla.redhat.com/show_bug.cgi?id=2430877
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23530.json
- https://access.redhat.com/errata/RHSA-2026:2714
- https://access.redhat.com/errata/RHSA-2026:2952
- https://access.redhat.com/errata/RHSA-2026:2222
- https://access.redhat.com/errata/RHSA-2026:2081
- https://access.redhat.com/errata/RHSA-2026:3039
- https://access.redhat.com/errata/RHSA-2026:3038
- https://access.redhat.com/errata/RHSA-2026:3036
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.