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- Snyk ID SNYK-SLES152-GRUB2-3148193
- published 26 Nov 2022
- disclosed 25 Nov 2022
How to fix?
grub2 to version 2.04-150188.8.131.52 or higher.
Note: Versions mentioned in the description apply to the upstream
How to fix? for
SLES:15.2 relevant versions.
A buffer overflow was found in grub_font_construct_glyph(). A malicious crafted pf2 font can lead to an overflow when calculating the max_glyph_size value, allocating a smaller than needed buffer for the glyph, this further leads to a buffer overflow and a heap based out-of-bounds write. An attacker may use this vulnerability to circumvent the secure boot mechanism.