CVE-2026-98722 (GCVE-0-2026-98722)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:46 – Updated: 2026-10-30 12:39
VLAI
Title
mtd: block2mtd: Fix divide error when erase_size is zero
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f , < c8004de07739fa9a39e310e859384f1458d7d076 (git)
Affected: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f , < 7ad5287e58d7aa1a848105f119e6c5b00446882f (git)
Affected: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f , < fd73c079abc58e10183a4db4dc9dc5012db17476 (git)
Affected: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f , < bff83b723e93acc788bd690dc4bc1f6f4356c35b (git)
Affected: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f , < 826170a49ca1315af6b293a02200585b1e2186d9 (git)
Affected: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f , < a991c28066e7ba4da7450bb04478849f7ac6a14a (git)
Affected: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f , < 21d0f05989bf0d5cef57b467a7fa4feefbd7236a (git)
Affected: ea6d833a3fddcd1d60414d48f34c7f4fbe88608f , < b5965c4221165045e19736794ca5f48ae3d67142 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.15
Unaffected: 0 , < 3.15 (semver)
Unaffected: 5.10.273 , ≤ 5.10.* (semver)
Unaffected: 5.15.224 , ≤ 5.15.* (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.113 , ≤ 6.12.* (semver)
Unaffected: 6.18.56 , ≤ 6.18.* (semver)
Unaffected: 7.2.10 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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              "operator": "OR"
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        {
          "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"
        },
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        },
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          "url": "https://git.kernel.org/stable/c/826170a49ca1315af6b293a02200585b1e2186d9"
        },
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          "url": "https://git.kernel.org/stable/c/b5965c4221165045e19736794ca5f48ae3d67142"
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      ],
      "title": "mtd: block2mtd: Fix divide error when erase_size is zero",
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        "engine": "bippy-1.2.0"
      }
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    "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"
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      "date": "2026-11-01",
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      "percentile": "0.0716"
    },
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      "cve": "CVE-2026-98722",
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      "title": "mtd: block2mtd: Fix divide error when erase_size is zero",
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      "version": "3"
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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."
          }
        ],
        "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",
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          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/fd73c079abc58e10183a4db4dc9dc5012db17476"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-22T21:09:52+00:00",
      "cve": "CVE-2026-98722",
      "id": "CVE-2026-98722",
      "initial_release_date": "2026-10-18T00:00:00+00:00",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "264",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mtd: block2mtd: Fix divide error when erase_size is zero",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98722.json",
      "version": "3"
    }
  }
}



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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.