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- Snyk ID SNYK-SLES152-GRUB2X8664EFI-3148219
- published 26 Nov 2022
- disclosed 25 Nov 2022
How to fix?
grub2-x86_64-efi to version 2.04-150220.127.116.11 or higher.
Note: Versions mentioned in the description apply only to the upstream
grub2-x86_64-efi package and not the
grub2-x86_64-efi package as distributed by
How to fix? for
SLES:15.2 relevant fixed versions and status.
When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.