CVE-2026-59679

Katalog CVE

CVSS 9.0 · Critical EPSS 0,40%

Kerentanan Out-of-bounds Write. Skor CVSS 3.1 9.0 (Critical) menurut suse.de.

Deskripsi (NVD)

fs_read_glyphs() in the libXfont2 font-server client (src/fc/fserve.c) indexes the per-character encoding[] array using num_chars from the FS_QueryXBitmaps16 reply, but that array was allocated with a size derived from num_extents in the separate FS_QueryXExtents16 reply. The two CARD32 fields are never cross-checked. A malicious or compromised font server can send a small num_extents (e.g. 1) in the extents reply, then a large num_chars (e.g. 100000) in the bitmaps reply. This causes attacker-controlled out-of-bounds heap read and writes.

Rincian

Terbit di NVD

10 September 2026

Terakhir diubah

10 September 2026

Status NVD

Awaiting Analysis

CVSS 3.1

9.0 (Critical), sumber suse.de
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-787: Out-of-bounds Write

EPSS (30 hari)

0,40% peluang dieksploitasi; lebih tinggi dari 32,7% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-59679