CVE-2022-2601
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
02 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
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.51% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 43.5% of scored records. A rank, not a probability.
- NVD base score
- 8.6 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2022-12-14 00:00Z3 YR AGO
- Last updated
- 2026-05-27 14:04Z5 MO AGO
- Reserved
- 2022-08-01
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.6)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- Weaknesses
- Data version
- 5.2
- Document digest
- fe93a32ccee4b5bb9ff8b85cb5b0e5607696f694456c0a23fc0478c5b9ab3283
05 Affected products
06 References
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2112975#c0
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20230203-0004/
- security.gentoo.orgGLSA-202311-14https://security.gentoo.org/glsa/202311-14
- arstechnica.comhttps://arstechnica.com/security/2024/08/a-patch-microsoft-spent-2-years-preparing-is-making-a-mess-for-some-linux-users/
07 Fixed in
AlmaLinux 8
- grub2-common Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-aa64 Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-aa64-cdboot Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-aa64-modules Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-ia32 Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-ia32-cdboot Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-ia32-modules Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-x64 Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-x64-cdboot Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-x64-modules Fixed in 1:2.02-142.el8_7.1.alma
- grub2-pc Fixed in 1:2.02-142.el8_7.1.alma
- grub2-pc-modules Fixed in 1:2.02-142.el8_7.1.alma
- grub2-ppc64le Fixed in 1:2.02-142.el8_7.1.alma
- grub2-ppc64le-modules Fixed in 1:2.02-142.el8_7.1.alma
- grub2-tools Fixed in 1:2.02-142.el8_7.1.alma
- grub2-tools-efi Fixed in 1:2.02-142.el8_7.1.alma
- grub2-tools-extra Fixed in 1:2.02-142.el8_7.1.alma
- grub2-tools-minimal Fixed in 1:2.02-142.el8_7.1.alma
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- grub2-common Fixed in 1:2.06-46.el9_1.3.alma
- grub2-efi-aa64 Fixed in 1:2.06-46.el9_1.3.alma
- grub2-efi-aa64-cdboot Fixed in 1:2.06-46.el9_1.3.alma
- grub2-efi-aa64-modules Fixed in 1:2.06-46.el9_1.3.alma
- grub2-efi-x64 Fixed in 1:2.06-46.el9_1.3.alma
- grub2-efi-x64-cdboot Fixed in 1:2.06-46.el9_1.3.alma
- grub2-efi-x64-modules Fixed in 1:2.06-46.el9_1.3.alma
- grub2-pc Fixed in 1:2.06-46.el9_1.3.alma
- grub2-pc-modules Fixed in 1:2.06-46.el9_1.3.alma
- grub2-ppc64le Fixed in 1:2.06-46.el9_1.3.alma
- grub2-ppc64le-modules Fixed in 1:2.06-46.el9_1.3.alma
- grub2-tools Fixed in 1:2.06-46.el9_1.3.alma
- grub2-tools-efi Fixed in 1:2.06-46.el9_1.3.alma
- grub2-tools-extra Fixed in 1:2.06-46.el9_1.3.alma
- grub2-tools-minimal Fixed in 1:2.06-46.el9_1.3.alma
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- grub2-common Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-aa64 Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-aa64-cdboot Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-aa64-modules Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-ia32 Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-ia32-cdboot Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-ia32-modules Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-x64 Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-x64-cdboot Fixed in 1:2.02-142.el8_7.1.alma
- grub2-efi-x64-modules Fixed in 1:2.02-142.el8_7.1.alma
- grub2-pc Fixed in 1:2.02-142.el8_7.1.alma
- grub2-pc-modules Fixed in 1:2.02-142.el8_7.1.alma
- grub2-ppc64le Fixed in 1:2.02-142.el8_7.1.alma
- grub2-ppc64le-modules Fixed in 1:2.02-142.el8_7.1.alma
- grub2-tools Fixed in 1:2.02-142.el8_7.1.alma
- grub2-tools-efi Fixed in 1:2.02-142.el8_7.1.alma
- grub2-tools-extra Fixed in 1:2.02-142.el8_7.1.alma
- grub2-tools-minimal Fixed in 1:2.02-142.el8_7.1.alma
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- grub2-common Fixed in 1:2.06-46.el9_1.3.alma
- grub2-efi-aa64 Fixed in 1:2.06-46.el9_1.3.alma
- grub2-efi-aa64-cdboot Fixed in 1:2.06-46.el9_1.3.alma
- grub2-efi-aa64-modules Fixed in 1:2.06-46.el9_1.3.alma
- grub2-efi-x64 Fixed in 1:2.06-46.el9_1.3.alma
- grub2-efi-x64-cdboot Fixed in 1:2.06-46.el9_1.3.alma
- grub2-efi-x64-modules Fixed in 1:2.06-46.el9_1.3.alma
- grub2-pc Fixed in 1:2.06-46.el9_1.3.alma
- grub2-pc-modules Fixed in 1:2.06-46.el9_1.3.alma
- grub2-ppc64le Fixed in 1:2.06-46.el9_1.3.alma
- grub2-ppc64le-modules Fixed in 1:2.06-46.el9_1.3.alma
- grub2-tools Fixed in 1:2.06-46.el9_1.3.alma
- grub2-tools-efi Fixed in 1:2.06-46.el9_1.3.alma
- grub2-tools-extra Fixed in 1:2.06-46.el9_1.3.alma
- grub2-tools-minimal Fixed in 1:2.06-46.el9_1.3.alma
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- grub2 Fixed in 2.06-5
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- grub2 Fixed in 2.06-5
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- grub2 Fixed in 2.06-5
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- grub2-signed No fix yet
- grub2-unsigned No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- grub2-signed Fixed in 1.187.3~18.04.1
- grub2-unsigned Fixed in 2.06-2ubuntu14.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- grub2-signed Fixed in 1.187.3~20.04.1
- grub2-unsigned Fixed in 2.06-2ubuntu14.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- grub2-signed Fixed in 1.187.3~22.04.1
- grub2-unsigned Fixed in 2.06-2ubuntu14.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- grub2-signed No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.