Buffer overflow in Freerdp
CVE-2026-29775
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, a client-side heap out-of-bounds read/write occurs in FreeRDP's bitmap cache subsystem due to an off-by-one boundary check in bitmap_cache_put. A malicious server can send a CACHE_BITMAP_ORDER (Rev1) with cacheId equal to maxCells, bypassing the guard and accessing cells[] one element past the allocated array. This vulnerability is fixed in 3.24.0.
Vulnerability class: Buffer Overflow
EPSS: 0.003 (23.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Freerdp — versions < 3.24.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Patch, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-29775?
- CVE-2026-29775 is a medium-severity vulnerability in Freerdp, classified under Out-of-bounds Write. CVSS score: 5.3/10. Published 2026-03-13.
- How severe is CVE-2026-29775?
- Medium severity. CVSS v3 base score is 5.3 out of 10.