CVE-2025-0686: Grub2: sınır dışı yazma

Açıklama (NVD)

A flaw was found in grub2. When performing a symlink lookup from a romfs filesystem, grub's romfs filesystem module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciously crafted filesystem may lead some of those buffer size calculations to overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result, the grub_romfs_read_symlink() may cause out-of-bounds writes when the calling grub_disk_read() function. This issue may be leveraged to corrupt grub's internal critical data and can result in arbitrary code execution by-passing secure boot protections.

Özet bilgiler

Ürün

Gnu Grub2

CVSS v3.1

6.4 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS

%0,29 (yüzdelik 21)

CWE

CWE-787

Yama

Yok / bilinmiyor

Etkilenen sürümler

Kaynaklar

• NVD kaydı
• access.redhat.com
• bugzilla.redhat.com
• lists.gnu.org
• CWE-787