CVE-2026-97503 (GCVE-0-2026-97503)
Vulnerability from cvelistv5
Published
2026-09-24 16:04
Modified
2026-10-21 12:52
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: genirq/proc: Size interrupt directory names for 10-digit interrupt numbers /proc/irq/<n>/ directory names are built in `char name[10]` buffers with `sprintf(name, "%u", irq)`. Ten-digit IRQ numbers already need 11 bytes including the trailing NUL, and current sparse-IRQ configurations allow interrupt numbers in that range. Size the temporary name buffer for the current decimal form and switch to bounded formatting when creating or removing the proc entry.
References
Impacted products
Vendor Product Version
Linux Linux Version: 721255b9826bd11c7a38b585905fc2dd0fb94e52
Version: 721255b9826bd11c7a38b585905fc2dd0fb94e52
Version: 721255b9826bd11c7a38b585905fc2dd0fb94e52
Version: 721255b9826bd11c7a38b585905fc2dd0fb94e52
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/irq/proc.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngenirq/proc: Size interrupt directory names for 10-digit interrupt numbers\n\n/proc/irq/\u003cn\u003e/ directory names are built in `char name[10]` buffers\nwith `sprintf(name, \"%u\", irq)`.\n\nTen-digit IRQ numbers already need 11 bytes including the trailing NUL, and\ncurrent sparse-IRQ configurations allow interrupt numbers in that range.\n\nSize the temporary name buffer for the current decimal form and switch\nto bounded formatting when creating or removing the proc entry."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:52:57.377Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/a8adf64fe7fd5d7c476769a043ee56eda7b775ce"
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          "url": "https://git.kernel.org/stable/c/488bcd7fd3e9a2ad647b71b505a269fdb28753c4"
        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/c2c7983c93f5d86962318be7e7298f1bc3feb1a6"
        }
      ],
      "title": "genirq/proc: Size interrupt directory names for 10-digit interrupt numbers",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97503",
    "datePublished": "2026-09-24T16:04:50.412Z",
    "dateReserved": "2026-09-24T16:01:01.151Z",
    "dateUpdated": "2026-10-21T12:52:57.377Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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