DEBIAN-CVE-2025-0686
- Source
- https://security-tracker.debian.org/tracker/CVE-2025-0686
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-0686.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2025-0686
- Upstream
- Published
- 2025-03-03T18:15:30Z
- Modified
- 2026-09-01T20:05:40Z
- Severity
-
- 6.4 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Debian:12 / grub2
Package
- Name
- grub2
- Purl
- pkg:deb/debian/grub2?arch=source&distro=bookworm
Debian:13 / grub2
Package
- Name
- grub2
- Purl
- pkg:deb/debian/grub2?arch=source&distro=trixie
Debian:14 / grub2
Package
- Name
- grub2
- Purl
- pkg:deb/debian/grub2?arch=source&distro=forky