by Kastro
Paper/Archive/CVE-2026-121952

CVE-2026-121952

FreeRDP FreeRDP — FreeRDP before 3.32.2 Proxy Out-of-Bounds Write via Bitmap Cache v2 Capability

CVSS 9.8
critical.is priorityof 100
29
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0No EPSS score.000 × 200.0No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

FreeRDP before 3.32.2 has an out-of-bounds write in the proxy because rdp_read_bitmap_cache_v2_capability_set rejects only numCellCaches values above 5, yet the bitmap cache v2 cell array is later accessed at fixed indices 0 through 4. A client connecting to the proxy can declare fewer than five cell caches in its Confirm Active, causing heap corruption, heap data leakage to the backend, or a crash.

Affected

ProductAffectedFixed inSource
FreeRDP< 3.32.23.32.2CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References

advisorygithub.com/FreeRDP/FreeRDP/security/advisories/GHSA-xc85-4mqc-xgcxwriteupvulncheck.com/advisories/freerdp-before-3.32.2-proxy-out-of-bounds-write-via-bitmap-cache-v2-capability