CVE-2026-70631

Katalog CVE

CVSS 5.5 · Medium EPSS 0,18%

Kerentanan Use of Uninitialized Resource pada ffmpeg. Skor CVSS 3.1 5.5 (Medium) menurut vulncheck.com.

Deskripsi (NVD)

FFmpeg versions from 0.5 up to, but not including, 9.0 contain an uninitialized heap memory disclosure vulnerability in the native TIFF decoder in libavcodec/tiff.c. An attacker who can cause FFmpeg to decode a crafted TIFF file can supply a valid Deflate-compressed strip that terminates successfully after producing fewer bytes than the declared strip requires. The tiff_unpack_zlib() function allocates a heap buffer sized for the full declared strip but copies all declared rows via memcpy() regardless of how many bytes zlib actually decompressed, causing unwritten bytes that can contain stale data from prior heap allocations to be incorporated into decoded image output and potentially exposing sensitive data in persistent services.

Rincian

Terbit di NVD

6 Agustus 2026

Terakhir diubah

1 September 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-908: Use of Uninitialized Resource

EPSS (30 hari)

0,18% peluang dieksploitasi; lebih tinggi dari 6,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/2f234ea34c81288e3840fca632dd16481d8de39f patch
• https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/3c287af3affe1286350faa69c02bcc5d49de18bb patch
• https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/a991b1fecbd8c9e6f4fc31c191bd12e4be27dbf7 patch
• https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23899 issue tracking · patch
• https://www.vulncheck.com/advisories/ffmpeg-uninitialized-heap-memory-read-in-tiff-decoder patch · advisory pihak ketiga