Vulnerability-Lookup

OESA-2022-2118 (CVE-2022-2601)

Vulnerability from osv_openeuler – Published: 2022-11-25 11:05 – Updated: 2026-08-06 11:05 – Source website

Summary

grub2 security update

Details

GNU GRUB is a Multiboot boot loader. It was derived from GRUB, the GRand Unified Bootloader, which was originally designed and implemented by Erich Stefan Boleyn.Briefly, a boot loader is the first software program that runs when a computer starts. It is responsible for loading and transferring control to the operating system kernel software (such as the Hurd or Linux). The kernel, in turn, initializes the rest of the operating system (e.g. GNU).

Security Fix(es):

A flaw was found where a maliciously crafted pf2 font could lead to an out-of-bounds write in grub2. A successful attack can lead to memory corruption and secure boot circumvention.(CVE-2022-2601)

A flaw was found in the grub2 font code. When rendering certain unicode sequences, it fails to properly validate the font width and height. These values are further used to access the font buffer, causing possible out-of-bounds writes. A malicious actor may craft a font capable of triggering this issue, allowing modifications in unauthorized memory segments, causing data integrity problems or leading to denial of service.(CVE-2022-3775)

Severity

6.4 (Medium)


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

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2022-2601	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2022-3775	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "grub2-debugsource-2.04-26.oe1.aarch64.rpm",
          "grub2-tools-minimal-2.04-26.oe1.aarch64.rpm",
          "grub2-efi-aa64-2.04-26.oe1.aarch64.rpm",
          "grub2-tools-2.04-26.oe1.aarch64.rpm",
          "grub2-debuginfo-2.04-26.oe1.aarch64.rpm",
          "grub2-tools-extra-2.04-26.oe1.aarch64.rpm",
          "grub2-efi-aa64-cdboot-2.04-26.oe1.aarch64.rpm"
        ],
        "noarch": [
          "grub2-common-2.04-26.oe1.noarch.rpm",
          "grub2-help-2.04-26.oe1.noarch.rpm",
          "grub2-efi-aa64-modules-2.04-26.oe1.noarch.rpm",
          "grub2-pc-modules-2.04-26.oe1.noarch.rpm",
          "grub2-efi-ia32-modules-2.04-26.oe1.noarch.rpm",
          "grub2-efi-x64-modules-2.04-26.oe1.noarch.rpm"
        ],
        "src": [
          "grub2-2.04-26.oe1.src.rpm"
        ],
        "x86_64": [
          "grub2-debuginfo-2.04-26.oe1.x86_64.rpm",
          "grub2-tools-minimal-2.04-26.oe1.x86_64.rpm",
          "grub2-tools-2.04-26.oe1.x86_64.rpm",
          "grub2-efi-x64-2.04-26.oe1.x86_64.rpm",
          "grub2-debugsource-2.04-26.oe1.x86_64.rpm",
          "grub2-efi-ia32-cdboot-2.04-26.oe1.x86_64.rpm",
          "grub2-pc-2.04-26.oe1.x86_64.rpm",
          "grub2-efi-x64-cdboot-2.04-26.oe1.x86_64.rpm",
          "grub2-tools-extra-2.04-26.oe1.x86_64.rpm",
          "grub2-efi-ia32-2.04-26.oe1.x86_64.rpm",
          "grub2-tools-efi-2.04-26.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "grub2",
        "purl": "pkg:rpm/openEuler/grub2\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.04-26.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "grub2-debuginfo-2.04-26.oe1.aarch64.rpm",
          "grub2-tools-2.04-26.oe1.aarch64.rpm",
          "grub2-tools-minimal-2.04-26.oe1.aarch64.rpm",
          "grub2-tools-extra-2.04-26.oe1.aarch64.rpm",
          "grub2-efi-aa64-cdboot-2.04-26.oe1.aarch64.rpm",
          "grub2-debugsource-2.04-26.oe1.aarch64.rpm",
          "grub2-efi-aa64-2.04-26.oe1.aarch64.rpm"
        ],
        "noarch": [
          "grub2-efi-aa64-modules-2.04-26.oe1.noarch.rpm",
          "grub2-efi-x64-modules-2.04-26.oe1.noarch.rpm",
          "grub2-pc-modules-2.04-26.oe1.noarch.rpm",
          "grub2-common-2.04-26.oe1.noarch.rpm",
          "grub2-help-2.04-26.oe1.noarch.rpm",
          "grub2-efi-ia32-modules-2.04-26.oe1.noarch.rpm"
        ],
        "src": [
          "grub2-2.04-26.oe1.src.rpm"
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        "x86_64": [
          "grub2-debuginfo-2.04-26.oe1.x86_64.rpm",
          "grub2-tools-extra-2.04-26.oe1.x86_64.rpm",
          "grub2-tools-2.04-26.oe1.x86_64.rpm",
          "grub2-efi-ia32-2.04-26.oe1.x86_64.rpm",
          "grub2-tools-minimal-2.04-26.oe1.x86_64.rpm",
          "grub2-efi-ia32-cdboot-2.04-26.oe1.x86_64.rpm",
          "grub2-pc-2.04-26.oe1.x86_64.rpm",
          "grub2-efi-x64-cdboot-2.04-26.oe1.x86_64.rpm",
          "grub2-tools-efi-2.04-26.oe1.x86_64.rpm",
          "grub2-efi-x64-2.04-26.oe1.x86_64.rpm",
          "grub2-debugsource-2.04-26.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP3",
        "name": "grub2",
        "purl": "pkg:rpm/openEuler/grub2\u0026distro=openEuler-20.03-LTS-SP3"
      },
      "ranges": [
        {
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            {
              "introduced": "0"
            },
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            }
          ],
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        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "grub2-debugsource-2.06-15.oe2203.aarch64.rpm",
          "grub2-debuginfo-2.06-15.oe2203.aarch64.rpm",
          "grub2-efi-aa64-2.06-15.oe2203.aarch64.rpm",
          "grub2-tools-extra-2.06-15.oe2203.aarch64.rpm",
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          "grub2-efi-aa64-cdboot-2.06-15.oe2203.aarch64.rpm",
          "grub2-tools-minimal-2.06-15.oe2203.aarch64.rpm"
        ],
        "noarch": [
          "grub2-efi-aa64-modules-2.06-15.oe2203.noarch.rpm",
          "grub2-pc-modules-2.06-15.oe2203.noarch.rpm",
          "grub2-common-2.06-15.oe2203.noarch.rpm",
          "grub2-efi-ia32-modules-2.06-15.oe2203.noarch.rpm",
          "grub2-efi-x64-modules-2.06-15.oe2203.noarch.rpm",
          "grub2-help-2.06-15.oe2203.noarch.rpm"
        ],
        "src": [
          "grub2-2.06-15.oe2203.src.rpm"
        ],
        "x86_64": [
          "grub2-tools-extra-2.06-15.oe2203.x86_64.rpm",
          "grub2-pc-2.06-15.oe2203.x86_64.rpm",
          "grub2-tools-2.06-15.oe2203.x86_64.rpm",
          "grub2-efi-x64-2.06-15.oe2203.x86_64.rpm",
          "grub2-efi-x64-cdboot-2.06-15.oe2203.x86_64.rpm",
          "grub2-efi-ia32-cdboot-2.06-15.oe2203.x86_64.rpm",
          "grub2-debuginfo-2.06-15.oe2203.x86_64.rpm",
          "grub2-debugsource-2.06-15.oe2203.x86_64.rpm",
          "grub2-tools-minimal-2.06-15.oe2203.x86_64.rpm",
          "grub2-efi-ia32-2.06-15.oe2203.x86_64.rpm",
          "grub2-tools-efi-2.06-15.oe2203.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS",
        "name": "grub2",
        "purl": "pkg:rpm/openEuler/grub2\u0026distro=openEuler-22.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.06-15.oe2203"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "GNU GRUB is a Multiboot boot loader. It was derived from GRUB, the GRand Unified Bootloader, which was originally designed and implemented by Erich Stefan Boleyn.Briefly, a boot loader is the first software program that runs when a computer starts. It is responsible for loading and transferring control to the operating system kernel software (such as the Hurd or Linux). The kernel, in turn, initializes the rest of the operating system (e.g. GNU).\r\n\r\nSecurity Fix(es):\r\n\r\nA flaw was found where a maliciously crafted pf2 font could lead to an out-of-bounds write in grub2. A successful attack can lead to memory corruption and secure boot circumvention.(CVE-2022-2601)\r\n\r\nA flaw was found in the grub2 font code. When rendering certain unicode sequences, it fails to properly validate the font width and height. These values are further used to access the font buffer, causing possible out-of-bounds writes. A malicious actor may craft a font capable of triggering this issue, allowing modifications in unauthorized memory segments, causing data integrity problems or leading to denial of service.(CVE-2022-3775)",
  "id": "OESA-2022-2118",
  "modified": "2026-08-06T11:05:26Z",
  "published": "2022-11-25T11:05:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-2118"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-2601"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-3775"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "grub2 security update",
  "upstream": [
    "CVE-2022-2601",
    "CVE-2022-3775"
  ]
}

CVE-2022-2601 (GCVE-0-2022-2601)

Vulnerability from cvelistv5 – Published: 2022-12-14 00:00 – Updated: 2026-05-27 14:04

Summary

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.

Severity

8.6 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-05-20 15:43 UTC

CWE

CWE-122 - >CWE-787
CWE-122 - Heap-based Buffer Overflow
CWE-787 - Out-of-bounds Write

Assigner

redhat redhat root

References

4 references

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2112975#c0
https://security.netapp.com/advisory/ntap-2023020…
https://security.gentoo.org/glsa/202311-14	vendor-advisory
https://arstechnica.com/security/2024/08/a-patch-…

Impacted products

1 product

Vendor	Product	Version
n/a	grub2	Affected: grub2 2.06 and lower

Show details on NVD website

JSON

To clipboard

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CVE-2022-3775 (GCVE-0-2022-3775)

Vulnerability from cvelistv5 – Published: 2022-12-19 00:00 – Updated: 2026-05-27 13:54

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.

Severity

7.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-27 13:54 UTC

CWE

CWE-787
CWE-787 - Out-of-bounds Write

Assigner

redhat redhat root

References

2 references

URL	Tags
https://access.redhat.com/security/cve/cve-2022-3775
https://security.gentoo.org/glsa/202311-14	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
n/a	grub2	Affected: All up to 2.06

Show details on NVD website

JSON

To clipboard

{
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    "cveId": "CVE-2022-3775",
    "datePublished": "2022-12-19T00:00:00.000Z",
    "dateReserved": "2022-10-31T00:00:00.000Z",
    "dateUpdated": "2026-05-27T13:54:16.609Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OESA-2022-2118 (CVE-2022-2601)

CVE-2022-2601 (GCVE-0-2022-2601)

CVE-2022-3775 (GCVE-0-2022-3775)

Tags

Sightings

Nomenclature

Related by attack behaviour