FKIE_CVE-2026-98722

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-30 13:21
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/21d0f05989bf0d5cef57b467a7fa4feefbd7236a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7ad5287e58d7aa1a848105f119e6c5b00446882f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/826170a49ca1315af6b293a02200585b1e2186d9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a991c28066e7ba4da7450bb04478849f7ac6a14a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b5965c4221165045e19736794ca5f48ae3d67142
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bff83b723e93acc788bd690dc4bc1f6f4356c35b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c8004de07739fa9a39e310e859384f1458d7d076
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fd73c079abc58e10183a4db4dc9dc5012db17476
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/mtd/devices/block2mtd.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c8004de07739fa9a39e310e859384f1458d7d076",
              "status": "affected",
              "version": "ea6d833a3fddcd1d60414d48f34c7f4fbe88608f",
              "versionType": "git"
            },
            {
              "lessThan": "7ad5287e58d7aa1a848105f119e6c5b00446882f",
              "status": "affected",
              "version": "ea6d833a3fddcd1d60414d48f34c7f4fbe88608f",
              "versionType": "git"
            },
            {
              "lessThan": "fd73c079abc58e10183a4db4dc9dc5012db17476",
              "status": "affected",
              "version": "ea6d833a3fddcd1d60414d48f34c7f4fbe88608f",
              "versionType": "git"
            },
            {
              "lessThan": "bff83b723e93acc788bd690dc4bc1f6f4356c35b",
              "status": "affected",
              "version": "ea6d833a3fddcd1d60414d48f34c7f4fbe88608f",
              "versionType": "git"
            },
            {
              "lessThan": "826170a49ca1315af6b293a02200585b1e2186d9",
              "status": "affected",
              "version": "ea6d833a3fddcd1d60414d48f34c7f4fbe88608f",
              "versionType": "git"
            },
            {
              "lessThan": "a991c28066e7ba4da7450bb04478849f7ac6a14a",
              "status": "affected",
              "version": "ea6d833a3fddcd1d60414d48f34c7f4fbe88608f",
              "versionType": "git"
            },
            {
              "lessThan": "21d0f05989bf0d5cef57b467a7fa4feefbd7236a",
              "status": "affected",
              "version": "ea6d833a3fddcd1d60414d48f34c7f4fbe88608f",
              "versionType": "git"
            },
            {
              "lessThan": "b5965c4221165045e19736794ca5f48ae3d67142",
              "status": "affected",
              "version": "ea6d833a3fddcd1d60414d48f34c7f4fbe88608f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/mtd/devices/block2mtd.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.15"
            },
            {
              "lessThan": "3.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.273",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.224",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-98722",
  "lastModified": "2026-10-30T13:21:21.127",
  "metrics": {},
  "published": "2026-10-18T16:17:25.813",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/21d0f05989bf0d5cef57b467a7fa4feefbd7236a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7ad5287e58d7aa1a848105f119e6c5b00446882f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/826170a49ca1315af6b293a02200585b1e2186d9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a991c28066e7ba4da7450bb04478849f7ac6a14a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b5965c4221165045e19736794ca5f48ae3d67142"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bff83b723e93acc788bd690dc4bc1f6f4356c35b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c8004de07739fa9a39e310e859384f1458d7d076"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fd73c079abc58e10183a4db4dc9dc5012db17476"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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