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CVE-2022-50404 (GCVE-0-2022-50404)

Vulnerability from cvelistv5 – Published: 2025-09-18 16:03 – Updated: 2026-05-23 15:24
VLAI
Title
fbdev: fbcon: release buffer when fbcon_do_set_font() failed
Summary
In the Linux kernel, the following vulnerability has been resolved: fbdev: fbcon: release buffer when fbcon_do_set_font() failed syzbot is reporting memory leak at fbcon_do_set_font() [1], for commit a5a923038d70 ("fbdev: fbcon: Properly revert changes when vc_resize() failed") missed that the buffer might be newly allocated by fbcon_set_font().
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 19:07 UTC
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 868749a7456dc48e93887a8474194e2ee6d6c21f , < 5a341810a22e51c3a7a108f7896b5fd58d44d127 (git)
Affected: ebd6f886aa2447fcfcdce5450c9e1028e1d681bb , < 88ec6d11052da527eb9268831e7a9bc5bbad02f6 (git)
Affected: a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 , < 06926607b9fddf7ce8017493899ce6eb7e79a123 (git)
Affected: a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 , < a609bfc1e644a8467cb31945ed1488374ebdc013 (git)
Affected: a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 , < 3c3bfb8586f848317ceba5d777e11204ba3e5758 (git)
Affected: f08ccb792d3eaf1dc62d8cbf6a30d6522329f660 (git)
Affected: 5.15.64 , < 5.15.86 (semver)
Affected: 5.19.6 , < 5.20 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50404.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-08-29T02:21:20Z",
      "cve": "CVE-2022-50404",
      "id": "CVE-2022-50404",
      "initial_release_date": "2025-09-19T23:36:33Z",
      "product_status:known_affected": "344",
      "product_status:known_not_affected": "395",
      "product_status:recommended": "206",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50404",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50404.json",
      "version": "29"
    },
    "vulnrichment": {
      "containers": {
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          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "LOW",
                  "attackVector": "LOCAL",
                  "availabilityImpact": "HIGH",
                  "baseScore": 5.5,
                  "baseSeverity": "MEDIUM",
                  "confidentialityImpact": "NONE",
                  "integrityImpact": "NONE",
                  "privilegesRequired": "LOW",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2022-50404",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-01-14T19:07:12.310932Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-401",
                    "description": "CWE-401 Missing Release of Memory after Effective Lifetime",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-01-14T19:07:06.157Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/video/fbdev/core/fbcon.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "5a341810a22e51c3a7a108f7896b5fd58d44d127",
                  "status": "affected",
                  "version": "868749a7456dc48e93887a8474194e2ee6d6c21f",
                  "versionType": "git"
                },
                {
                  "lessThan": "88ec6d11052da527eb9268831e7a9bc5bbad02f6",
                  "status": "affected",
                  "version": "ebd6f886aa2447fcfcdce5450c9e1028e1d681bb",
                  "versionType": "git"
                },
                {
                  "lessThan": "06926607b9fddf7ce8017493899ce6eb7e79a123",
                  "status": "affected",
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                  "versionType": "git"
                },
                {
                  "lessThan": "a609bfc1e644a8467cb31945ed1488374ebdc013",
                  "status": "affected",
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                  "versionType": "git"
                },
                {
                  "lessThan": "3c3bfb8586f848317ceba5d777e11204ba3e5758",
                  "status": "affected",
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                },
                {
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                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/video/fbdev/core/fbcon.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "6.0"
                },
                {
                  "lessThan": "6.0",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.86",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.0.*",
                  "status": "unaffected",
                  "version": "6.0.16",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.2",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.2",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.86",
                      "versionStartIncluding": "5.15.64",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.0.16",
                      "versionStartIncluding": "6.0",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.2",
                      "versionStartIncluding": "6.0",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                      "versionStartIncluding": "6.0",
                      "vulnerable": true
                    },
                    {
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                      "versionStartIncluding": "5.19.6",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: fbcon: release buffer when fbcon_do_set_font() failed\n\nsyzbot is reporting memory leak at fbcon_do_set_font() [1], for\ncommit a5a923038d70 (\"fbdev: fbcon: Properly revert changes when\nvc_resize() failed\") missed that the buffer might be newly allocated\nby fbcon_set_font()."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T19:18:50.459Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/5a341810a22e51c3a7a108f7896b5fd58d44d127"
            },
            {
              "url": "https://git.kernel.org/stable/c/88ec6d11052da527eb9268831e7a9bc5bbad02f6"
            },
            {
              "url": "https://git.kernel.org/stable/c/06926607b9fddf7ce8017493899ce6eb7e79a123"
            },
            {
              "url": "https://git.kernel.org/stable/c/a609bfc1e644a8467cb31945ed1488374ebdc013"
            },
            {
              "url": "https://git.kernel.org/stable/c/3c3bfb8586f848317ceba5d777e11204ba3e5758"
            }
          ],
          "title": "fbdev: fbcon: release buffer when fbcon_do_set_font() failed",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-50404",
        "datePublished": "2025-09-18T16:03:49.643Z",
        "dateReserved": "2025-09-17T14:53:07.000Z",
        "dateUpdated": "2026-05-11T19:18:50.459Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.