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- Snyk ID SNYK-SLES152-GRUB2X8664XEN-3148222
- published 26 Nov 2022
- disclosed 25 Nov 2022
How to fix?
grub2-x86_64-xen to version 2.04-150126.96.36.199 or higher.
Note: Versions mentioned in the description apply to the upstream
How to fix? for
SLES:15.2 relevant versions.
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.