Integer overflow in GNU Grub2
CVE-2024-45779
An integer overflow flaw was found in the BFS file system driver in grub2. When reading a file with an indirect extent map, grub2 fails to validate the number of extent entries to be read. A crafted or corrupted BFS filesystem may cause an integer overflow during the file reading, leading to a heap of bounds read. As a consequence, sensitive data may be leaked, or grub2 will crash.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (19.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2024-45779 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking)
- lists.gnu.org/archive/html/grub-devel/2025-02/msg00024.html (Mailing List)
Frequently asked questions
- What is CVE-2024-45779?
- CVE-2024-45779 is a medium-severity vulnerability in GNU Grub2, classified under Integer Overflow or Wraparound. CVSS score: 6.0/10. Published 2025-03-03.
- How severe is CVE-2024-45779?
- Medium severity. CVSS v3 base score is 6.0 out of 10.