GRUB2 (UDF filesystem parser): Heap buffer overflow in grub_udf_read_block

CVE-2025-0689Firmware, BMC & network fabricGRUB2 2025 batchcurated

Impact

Heap buffer overflow in grub_udf_read_block. UDF is the optical/ISO filesystem, which is precisely what BMC virtual media presents - so this one is reachable by anyone with BMC credentials, not only by a local tenant.

Who can reach it

Crafted UDF/ISO image, including one mounted remotely through iDRAC/iLO/XCC virtual media.

What to do

grub2 package update + reboot. Disable BMC virtual media where you do not need it - that closes the most convenient remote path to this and several other parser bugs at once.

References

https://nvd.nist.gov/vuln/detail/CVE-2025-0689 https://www.openwall.com/lists/oss-security/2025/02/18/3

This entry is curated: imported from vendor advisories with machine assistance, not yet individually verified. Confirm against your vendor's advisory before acting, and report anything wrong.