{"id":"CVE-2025-1125","title":"When reading data from a hfs filesystem, grub's hfs filesystem module uses user-controlled parameters from the filesystem metadata to calculate the internal buffers size, however it misses to properly check for integer overflows","summary":"When reading data from a hfs filesystem, grub's hfs filesystem module uses user-controlled parameters from the filesystem metadata to calculate the internal buffers size, however it misses to properly check for integer overflows. A malic…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-787"],"vendor":"gnu","product":"grub2","affected":["grub2 <= 2.12"],"published":"2025-03-03","updated":"2026-06-25","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-1125","references":[{"url":"https://access.redhat.com/security/cve/CVE-2025-1125","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2346138","label":"secalert@redhat.com"},{"url":"https://lists.gnu.org/archive/html/grub-devel/2025-02/msg00024.html","label":"secalert@redhat.com"}],"tags":["nvd"],"epss":0.00427,"epssPercentile":0.36603,"ingestedAt":"2026-06-29T13:24:34.179Z","slug":"CVE-2025-1125","body":"## Overview\n\nWhen reading data from a hfs filesystem, grub's hfs filesystem module uses user-controlled parameters from the filesystem metadata to calculate the internal buffers size, however it misses to properly check for integer overflows. A maliciouly crafted filesystem may lead some of those buffer size calculation to overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result the hfsplus_open_compressed_real() function will write past of the internal buffer length. This flaw may be leveraged to corrupt grub's internal critical data and may result in arbitrary code execution by-passing secure boot protections.\n\n## Affected\n\n- `grub2 <= 2.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}