{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-53402",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-53402",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T12:02:01.795Z",
    "updatedAt": "2026-10-19T20:07:47.003Z",
    "importedAt": "2026-10-24T01:58:20.586Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "fbdev: fbcon: fix out-of-bounds read in err_out of fbcon_do_set_font()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: fbcon: fix out-of-bounds read in err_out of fbcon_do_set_font()\n\nWhen fbcon_do_set_font() fails (e.g., due to a memory allocation failure\ninside vc_resize() under heavy memory pressure), it jumps to the `err_out`\nlabel to roll back the console state. However, the current rollback logic\nforgets to restore the `hi_font` state, leading to a severe state machine\ncorruption.\n\nEarlier in the function, `set_vc_hi_font()` might be called to change\n`vc->vc_hi_font_mask` and mutate the screen buffer. If `vc_resize()`\nsubsequently fails, the `err_out` path restores `vc_font.charcount`\nbut entirely skips rolling back the `vc_hi_font_mask` and the screen\nbuffer.\n\nThis mismatch leaves the terminal in a desynchronized state. Because\n`vc_hi_font_mask` remains set, the VT subsystem will still accept\ncharacter indices greater than 255 from userspace and write them to the\nscreen buffer. Subsequent rendering calls (e.g., `fbcon_putcs()`) will\nthen use these inflated indices to access the reverted, 256-character\nfont array, leading to a deterministic out-of-bounds read and potential\nkernel memory disclosure.\n\nFix this by adding the missing rollback logic for the `hi_font` mask\nand screen buffer in the error path.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "868749a7456dc48e93887a8474194e2ee6d6c21f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cb016bcb40c81e7b19c4ae6143babb366dae8e20"
            },
            {
              "version": "ebd6f886aa2447fcfcdce5450c9e1028e1d681bb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ac562193c36696513ae196171892e9338475c4bc"
            },
            {
              "version": "a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3618a4c5b2591cfa83efe74f5b18c2d02b35c3f5"
            },
            {
              "version": "a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a7a526fbc847f07ad3a503c7382189be5ab68574"
            },
            {
              "version": "a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b5bb2c696e140c399cb874def2feedf61dee27d6"
            },
            {
              "version": "a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24",
              "status": "affected",
              "versionType": "git",
              "lessThan": "076b1aa65f77a49bce5a48a4a55a397cfcafa2b8"
            },
            {
              "version": "a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24",
              "status": "affected",
              "versionType": "git",
              "lessThan": "39815715cbcfabb16fc8c5f4a23deeda20f5df62"
            },
            {
              "version": "a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8fdc8c2057eea08d40ce2c8eed41ff9e451c65c2"
            },
            {
              "version": "f08ccb792d3eaf1dc62d8cbf6a30d6522329f660",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.10.249",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.261"
            },
            {
              "version": "5.15.64",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.212"
            },
            {
              "version": "5.19.6",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.20"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.0",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.0"
            },
            {
              "version": "5.10.261",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.212",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.178",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.145",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.96",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.39",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}