CVE-2026-40033

Katalog CVE

CVSS 8.8 · High EPSS 1,1%

Kerentanan Heap-based Buffer Overflow pada freerdp. Skor CVSS 3.1 8.8 (High) menurut vulncheck.com.

Deskripsi (NVD)

FreeRDP before 3.26.0 contains a heap-buffer-overflow vulnerability in gdi_CacheToSurface that allows remote attackers to write out-of-bounds heap memory. The vulnerability occurs because rectangle validation clamps coordinates to UINT16_MAX but performs copy operations using unclamped cache entry dimensions, enabling malicious RDP servers to trigger large out-of-bounds writes and potentially achieve remote code execution or client crash.

Rincian

Terbit di NVD

26 Mei 2026

Terakhir diubah

27 Juli 2026

Status NVD

Modified

CVSS 3.1

8.8 (High), sumber vulncheck.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-122: Heap-based Buffer Overflow
CWE-787: Out-of-bounds Write

EPSS (30 hari)

1,1% peluang dieksploitasi; lebih tinggi dari 63,7% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-p6r2-4hgm-m6ff exploit · mitigasi · advisory vendor
• https://www.vulncheck.com/advisories/freerdp-heap-buffer-overflow-in-gdi-cachetosurface-via-rectangle-validati... advisory pihak ketiga
• https://github.com/FreeRDP/FreeRDP/commit/d7508ebcd82842a691ae4941e5104d14240a89ae
• https://github.com/FreeRDP/FreeRDP/pull/12713
• https://access.redhat.com/errata/RHSA-2026:36203
• https://access.redhat.com/errata/RHSA-2026:46393
• https://access.redhat.com/security/cve/CVE-2026-40033
• https://bugzilla.redhat.com/show_bug.cgi?id=2481473
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40033.json