CVE-2026-98722 (GCVE-0-2026-98722)
Vulnerability from cvelistv5
Published
2026-10-18 15:46
Modified
2026-10-30 12:39
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mtd: block2mtd: Fix divide error when erase_size is zero The erase size is parsed from the "block2mtd" module parameter and can be set to zero. add_device() then evaluates if (size % erase_size) with a zero divisor, which triggers a divide error: divide error: 0000 [#1] PREEMPT SMP PTI RIP: 0010:add_device drivers/mtd/devices/block2mtd.c:296 [inline] RIP: 0010:block2mtd_setup2+0x592/0xda0 drivers/mtd/devices/block2mtd.c:459 Call Trace: block2mtd_setup+0x27/0xe0 drivers/mtd/devices/block2mtd.c:476 param_attr_store+0x214/0x310 kernel/params.c:589 module_attr_store+0x65/0x90 kernel/params.c:904 kernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345 ... Reject a zero erase size before performing the modulo operation so the existing "erasesize must be a divisor of device size" error path reports the invalid argument and frees the device.
References
Impacted products
Vendor Product Version
Linux Linux Version: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f
Version: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f
Version: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f
Version: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f
Version: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f
Version: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f
Version: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f
Version: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/mtd/devices/block2mtd.c"
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      "cpeApplicability": [
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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\nmtd: block2mtd: Fix divide error when erase_size is zero\n\nThe erase size is parsed from the \"block2mtd\" module parameter and can\nbe set to zero. add_device() then evaluates\n\n        if (size % erase_size)\n\nwith a zero divisor, which triggers a divide error:\n\ndivide error: 0000 [#1] PREEMPT SMP PTI\nRIP: 0010:add_device drivers/mtd/devices/block2mtd.c:296 [inline]\nRIP: 0010:block2mtd_setup2+0x592/0xda0 drivers/mtd/devices/block2mtd.c:459\nCall Trace:\nblock2mtd_setup+0x27/0xe0 drivers/mtd/devices/block2mtd.c:476\nparam_attr_store+0x214/0x310 kernel/params.c:589\nmodule_attr_store+0x65/0x90 kernel/params.c:904\nkernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345\n...\n\nReject a zero erase size before performing the modulo operation so the\nexisting \"erasesize must be a divisor of device size\" error path\nreports the invalid argument and frees the device."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:39:05.611Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c8004de07739fa9a39e310e859384f1458d7d076"
        },
        {
          "url": "https://git.kernel.org/stable/c/7ad5287e58d7aa1a848105f119e6c5b00446882f"
        },
        {
          "url": "https://git.kernel.org/stable/c/fd73c079abc58e10183a4db4dc9dc5012db17476"
        },
        {
          "url": "https://git.kernel.org/stable/c/bff83b723e93acc788bd690dc4bc1f6f4356c35b"
        },
        {
          "url": "https://git.kernel.org/stable/c/826170a49ca1315af6b293a02200585b1e2186d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/a991c28066e7ba4da7450bb04478849f7ac6a14a"
        },
        {
          "url": "https://git.kernel.org/stable/c/21d0f05989bf0d5cef57b467a7fa4feefbd7236a"
        },
        {
          "url": "https://git.kernel.org/stable/c/b5965c4221165045e19736794ca5f48ae3d67142"
        }
      ],
      "title": "mtd: block2mtd: Fix divide error when erase_size is zero",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98722",
    "datePublished": "2026-10-18T15:46:58.093Z",
    "dateReserved": "2026-09-25T10:25:14.366Z",
    "dateUpdated": "2026-10-30T12:39:05.611Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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