CVE-2026-50256

x.org x server, x.org xwayland, redhat enterprise linux

TLP:CLEAR

csirt@kutim:~/threat-intel/cve/CVE-2026-50256

Katalog CVE

CVSS 7.8 · High EPSS 0,21%

Kerentanan Stack-based Buffer Overflow pada x.org x server, x.org xwayland +1 lainnya. Skor CVSS 3.1 7.8 (High) menurut redhat.com.

Deskripsi (NVD)

A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. A mismatch between the X server and the libXfont2 library's maximum font name length can cause a stack buffer overflow during font alias resolution. The server allocates a 256 byte stack buffer but libXfont2's alias target name length is 1024 bytes. A font alias name between 257 and 1023 bytes causes the X server to copy that name into the undersized stack buffer without further checks. This may be used to crash the server, or for privilege escalation if the X server runs as root.

Rincian

Terbit di NVD
5 Juni 2026
Terakhir diubah
5 Agustus 2026
Status NVD
Modified
CVSS 3.1
7.8 (High), sumber redhat.com
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator
Jenis kelemahan (CWE)
CWE-121: Stack-based Buffer Overflow
EPSS (30 hari)
0,21% peluang dieksploitasi; lebih tinggi dari 10,4% CVE lain

Produk dan versi terdampak

VendorProdukVersi terdampak
x.org x server Semua versi sebelum 21.1.23
x.org xwayland Semua versi sebelum 24.1.12
redhat enterprise linux Versi 7.0
redhat enterprise linux Versi 8.0
redhat enterprise linux Versi 9.0
redhat enterprise linux Versi 10.0

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.