CVE-2026-43123 (GCVE-0-2026-43123)
Vulnerability from cvelistv5
Published
2026-05-06 11:27
Modified
2026-05-11 22:18
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: fbcon: check return value of con2fb_acquire_newinfo() If fbcon_open() fails when called from con2fb_acquire_newinfo() then info->fbcon_par pointer remains NULL which is later dereferenced. Add check for return value of the function con2fb_acquire_newinfo() to avoid it. Found by Linux Verification Center (linuxtesting.org) with SVACE.
References
Impacted products
Vendor Product Version
Linux Linux Version: d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e
Version: d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e
Version: d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e
Version: d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e
Version: d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e
Version: d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e
Version: d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/video/fbdev/core/fbcon.c"
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.23"
            },
            {
              "lessThan": "2.6.23",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.203",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.203",
                  "versionStartIncluding": "2.6.23",
                  "vulnerable": true
                },
                {
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                  "vulnerable": true
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbcon: check return value of con2fb_acquire_newinfo()\n\nIf fbcon_open() fails when called from con2fb_acquire_newinfo() then\ninfo-\u003efbcon_par pointer remains NULL which is later dereferenced.\n\nAdd check for return value of the function con2fb_acquire_newinfo() to\navoid it.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:18:12.071Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d3e535533767c85788529e626478718b7e95a59f"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b5a754ec86bc6064af9aca76eb191c2405e6b0c"
        },
        {
          "url": "https://git.kernel.org/stable/c/a785c4e2a999c2d51dfcf40d317cfb30cc735d2c"
        },
        {
          "url": "https://git.kernel.org/stable/c/0b038c0be6827dd2dbb1ce4f8d92d97c80cbe9cc"
        },
        {
          "url": "https://git.kernel.org/stable/c/11a93180a70bb3095a9bd80d113d9277e30d9959"
        },
        {
          "url": "https://git.kernel.org/stable/c/f57b61624c86ef8f87f6e6b7dd0755de03d90e89"
        },
        {
          "url": "https://git.kernel.org/stable/c/011a0502801c8536f64141a2b61362c14f456544"
        }
      ],
      "title": "fbcon: check return value of con2fb_acquire_newinfo()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43123",
    "datePublished": "2026-05-06T11:27:09.553Z",
    "dateReserved": "2026-05-01T14:12:55.987Z",
    "dateUpdated": "2026-05-11T22:18:12.071Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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