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

Vulnerability from cvelistv5 – Published: 2022-12-14 00:00 – Updated: 2026-05-27 14:04
VLAI
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
Assigner
References
Impacted products
Vendor Product Version CPE status
n/a grub2 Affected: grub2 2.06 and lower
Show details on NVD website
To clipboard 

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            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-05-27T16:27:10+00:00",
      "cve": "CVE-2022-2601",
      "id": "CVE-2022-2601",
      "initial_release_date": "2022-11-15T10:00:00+00:00",
      "product_status:fixed": "526",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-2601.json",
      "version": "3"
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    "suse_vex": {
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      "current_release_date": "2026-08-29T02:39:36Z",
      "cve": "CVE-2022-2601",
      "id": "CVE-2022-2601",
      "initial_release_date": "2023-02-15T03:32:34Z",
      "product_status:known_affected": "260",
      "product_status:recommended": "819",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-2601",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-2601.json",
      "version": "60"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
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              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            "references": [
              {
                "url": "https://arstechnica.com/security/2024/08/a-patch-microsoft-spent-2-years-preparing-is-making-a-mess-for-some-linux-users/"
              },
              {
                "tags": [
                  "x_transferred"
                ],
                "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2112975#c0"
              },
              {
                "tags": [
                  "x_transferred"
                ],
                "url": "https://security.netapp.com/advisory/ntap-20230203-0004/"
              },
              {
                "name": "GLSA-202311-14",
                "tags": [
                  "vendor-advisory",
                  "x_transferred"
                ],
                "url": "https://security.gentoo.org/glsa/202311-14"
              }
            ],
            "title": "CVE Program Container",
            "x_generator": {
              "engine": "ADPogram 0.0.1"
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          },
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "LOW",
                  "attackVector": "LOCAL",
                  "availabilityImpact": "HIGH",
                  "baseScore": 8.6,
                  "baseSeverity": "HIGH",
                  "confidentialityImpact": "HIGH",
                  "integrityImpact": "HIGH",
                  "privilegesRequired": "NONE",
                  "scope": "CHANGED",
                  "userInteraction": "REQUIRED",
                  "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2022-2601",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-05-20T15:43:38.484246Z",
                    "version": "2.0.3"
                  },
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              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-122",
                    "description": "CWE-122 Heap-based Buffer Overflow",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              },
              {
                "descriptions": [
                  {
                    "cweId": "CWE-787",
                    "description": "CWE-787 Out-of-bounds Write",
                    "lang": "en",
                    "type": "CWE"
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                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-05-20T15:43:37.168Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "grub2",
              "vendor": "n/a",
              "versions": [
                {
                  "status": "affected",
                  "version": "grub2 2.06 and lower"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "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."
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-122",
                  "description": "CWE-122-\u003eCWE-787",
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          "providerMetadata": {
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            "shortName": "redhat"
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            },
            {
              "name": "GLSA-202311-14",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://security.gentoo.org/glsa/202311-14"
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          ]
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      },
      "cveMetadata": {
        "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "assignerShortName": "redhat",
        "cveId": "CVE-2022-2601",
        "datePublished": "2022-12-14T00:00:00.000Z",
        "dateReserved": "2022-08-01T00:00:00.000Z",
        "dateUpdated": "2026-05-27T14:04:59.552Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


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.