CVE-2022-2601

HIGH

GRUB2 < 2.06 - Heap-based Buffer Overflow via Crafted PF2 Font

Title source: llm

Description

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.

References (4)

Core 4

Core References

Issue Tracking, Third Party Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2112975#c0

Various Sources

https://arstechnica.com/security/2024/08/a-patch-microsoft-spent-2-years-preparing-is-making-a-mess-for-some-linux-users/

Vendor Advisory

https://security.netapp.com/advisory/ntap-20230203-0004/

Third Party Advisory vendor-advisory

https://security.gentoo.org/glsa/202311-14

Scores

CVSS v3 8.6

EPSS 0.0051

EPSS Percentile 39.8%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-122 CWE-787

Status published

Products (13)

None/grub2 grub2 2.06 and lower

fedoraproject/fedora 37

gnu/grub2 < 2.06

redhat/enterprise_linux_eus 9.0

redhat/enterprise_linux_for_power_little_endian_eus 9.0

redhat/enterprise_linux_server_aus 8.2

redhat/enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions 8.1

redhat/enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions 8.2

redhat/enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions 9.0

redhat/enterprise_linux_server_tus 8.2

... and 3 more

Published Dec 14, 2022

Tracked Since Feb 18, 2026