Out-of-bounds Write Affecting grub2-i386-pc package, versions <2.04-150300.22.25.1



    Attack Complexity High
    Privileges Required High
    Confidentiality High
    Integrity High
    Availability High
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7.1 high
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Red Hat
7.1 high
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6.4 medium

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  • Snyk ID SNYK-SLES153-GRUB2I386PC-3148198
  • published 26 Nov 2022
  • disclosed 25 Nov 2022

How to fix?

Upgrade SLES:15.3 grub2-i386-pc to version 2.04-150300.22.25.1 or higher.

NVD Description

Note: Versions mentioned in the description apply to the upstream grub2-i386-pc package. See How to fix? for SLES:15.3 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.