CVE-2026-56392

Katalog CVE

CVSS 6.1 · Medium EPSS 0,19%

Kerentanan Heap-based Buffer Overflow pada gnu coreutils. Skor CVSS 3.1 6.1 (Medium) menurut NVD.

Deskripsi (NVD)

GNU coreutils unexpand is vulnerable to a heap-based buffer overflow due to an integer overflow during buffer allocation when processing large tab stop (-t) values. The multiplication used to calculate the allocation size can wrap around, resulting in an undersized buffer. When processing crafted input, subsequent writes exceed the allocated memory, leading to an out‑of‑bounds heap write. When running GNU coreutils unexpand with attacker-provided large tab stop (-t) arguments, this behavior leads to a crash and potentially achieve a heap write primitive depending on memory layout. This issue has been fixed in the commit b60a159fdc5bfcf9988d3a4cb6f53abe8ad5d35d

Rincian

Terbit di NVD

24 Juli 2026

Terakhir diubah

2 Oktober 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-122: Heap-based Buffer Overflow

EPSS (30 hari)

0,19% peluang dieksploitasi; lebih tinggi dari 7,6% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.savannah.gnu.org/cgit/coreutils.git/commit/?id=b60a159fdc5bfcf9988d3a4cb6f53abe8ad5d35d patch
• https://cert.pl/en/posts/2026/07/CVE-2026-56391 advisory pihak ketiga
• https://git.savannah.gnu.org/cgit/coreutils.git/ product