CVE-2022-3775

Summary

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.

Affected Software

Weaknesses

• CWE-787: CWE-787

ADP Enrichment

CVE Program Container

Additional References

• https://access.redhat.com/security/cve/cve-2022-3775
• https://security.gentoo.org/glsa/202311-14

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

References

• https://access.redhat.com/security/cve/cve-2022-3775
• https://security.gentoo.org/glsa/202311-14

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