CVE-2026-64395

Katalog CVE

CVSS 7.5 · High EPSS 0,55%

Kerentanan pada linux kernel. Skor CVSS 3.1 7.5 (High) menurut CNA.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: ksmbd: require source read access for duplicate extents FSCTL_DUPLICATE_EXTENTS_TO_FILE passes the source file directly to vfs_clone_file_range() or vfs_copy_file_range() without checking the SMB access mask granted to the source handle. A handle opened with attribute access can consequently be used to copy file contents into an attacker-readable destination. Require FILE_READ_DATA on the source handle before either VFS operation, matching other ksmbd data-copy paths.

Rincian

Terbit di NVD

25 Juli 2026

Terakhir diubah

4 September 2026

Status NVD

Analyzed

CVSS 3.1

7.5 (High), sumber CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N · uraikan di kalkulator

EPSS (30 hari)

0,55% peluang dieksploitasi; lebih tinggi dari 44,7% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/2d2ab6983620c2d60ce7db72133984ca3873b929 patch
• https://git.kernel.org/stable/c/67bdad9cf01b25030e3bf00bbce6c309319d6663 patch
• https://git.kernel.org/stable/c/a10942af27832c2761d020863a46e79bebe0567d patch
• https://git.kernel.org/stable/c/b0d4d5cb846a1ddb7aaab9adfb5986e4540e6e5f patch
• https://git.kernel.org/stable/c/cedff600f1642aa982178503552f0d007bc829c8 patch
• https://git.kernel.org/stable/c/db231af842868268839f9f9619c68cb27830d8be patch