CVE-2026-98232 (GCVE-0-2026-98232)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:45 – Updated: 2026-10-06 08:45
VLAI
Title
scsi: core: Validate MODE SENSE lengths in scsi_cdl_enable()
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: core: Validate MODE SENSE lengths in scsi_cdl_enable() scsi_cdl_enable() uses length fields returned by MODE SENSE to locate the ATA feature mode page in a 64-byte stack buffer. A target can report a total length shorter than its mode header and block descriptors. The unsigned subtraction used for the MODE SELECT length can wrap, and the separately computed buf_data can point beyond buf. During automatic scan, enable is false, so the read-modify-write of buf_data[4] can clear the low two bits of a target-selected out-of-bounds stack byte. scsi_mode_select() can then copy up to 64 bytes from outside the buffer into the outgoing MODE SELECT payload, disclosing stack contents to the target. This is reachable while scanning a USB storage device that identifies as an ATA device and advertises CDL support. No filesystem mount or userspace access to the block device is required. On upstream commit cee9395acd80 ("Linux 7.3-rc1"), a build-specific, one-vCPU QEMU/Raw Gadget proof using QEMU-only multi-UDC allocator sampling executed a fixed proof command inside the guest and created a UID-0-owned marker during automatic enumeration, with KASLR and NX enabled. The issue was independently found during security research at Drivesec S.r.l. Cap the available length to the buffer size. Validate and consume the mode header and block descriptor lengths before using the page, and require the five bytes needed to access the CDL field.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 54/100 over 6633 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1b22cfb14142aba7742d307c4f8d7006f919308c , < 39491a1ae93054fea10b4030180e5c797b2c0343 (git)
Affected: 1b22cfb14142aba7742d307c4f8d7006f919308c , < 60b0b8ce803e3c2b2a9e5485ab3f88599fb4c7a4 (git)
Affected: 1b22cfb14142aba7742d307c4f8d7006f919308c , < 6233d0b3ef4623df0d6934dc8b93b161e9854f6b (git)
Affected: 1b22cfb14142aba7742d307c4f8d7006f919308c , < 99a6e4a9176da456904b67dcbae6e77d122782b7 (git)
Affected: 1b22cfb14142aba7742d307c4f8d7006f919308c , < 3d676e458fe0c566f5a62753dc696b6a862fc412 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.5
Unaffected: 0 , < 6.5 (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.112 , ≤ 6.12.* (semver)
Unaffected: 6.18.54 , ≤ 6.18.* (semver)
Unaffected: 7.2.8 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: core: Validate MODE SENSE lengths in scsi_cdl_enable()\n\nscsi_cdl_enable() uses length fields returned by MODE SENSE to locate\nthe ATA feature mode page in a 64-byte stack buffer. A target can report\na total length shorter than its mode header and block descriptors. The\nunsigned subtraction used for the MODE SELECT length can wrap, and the\nseparately computed buf_data can point beyond buf.\n\nDuring automatic scan, enable is false, so the read-modify-write of\nbuf_data[4] can clear the low two bits of a target-selected\nout-of-bounds stack byte. scsi_mode_select() can then copy up to 64\nbytes from outside the buffer into the outgoing MODE SELECT payload,\ndisclosing stack contents to the target.\n\nThis is reachable while scanning a USB storage device that identifies as\nan ATA device and advertises CDL support. No filesystem mount or\nuserspace access to the block device is required.\n\nOn upstream commit cee9395acd80 (\"Linux 7.3-rc1\"), a build-specific,\none-vCPU QEMU/Raw Gadget proof using QEMU-only multi-UDC allocator\nsampling executed a fixed proof command inside the guest and created a\nUID-0-owned marker during automatic enumeration, with KASLR and NX\nenabled.\n\nThe issue was independently found during security research at Drivesec\nS.r.l.\n\nCap the available length to the buffer size. Validate and consume the\nmode header and block descriptor lengths before using the page, and\nrequire the five bytes needed to access the CDL field."
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
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          "url": "https://git.kernel.org/stable/c/3d676e458fe0c566f5a62753dc696b6a862fc412"
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    "dateReserved": "2026-09-25T10:25:14.328Z",
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: core: Validate MODE SENSE lengths in scsi_cdl_enable()\n\nscsi_cdl_enable() uses length fields returned by MODE SENSE to locate\nthe ATA feature mode page in a 64-byte stack buffer. A target can report\na total length shorter than its mode header and block descriptors. The\nunsigned subtraction used for the MODE SELECT length can wrap, and the\nseparately computed buf_data can point beyond buf.\n\nDuring automatic scan, enable is false, so the read-modify-write of\nbuf_data[4] can clear the low two bits of a target-selected\nout-of-bounds stack byte. scsi_mode_select() can then copy up to 64\nbytes from outside the buffer into the outgoing MODE SELECT payload,\ndisclosing stack contents to the target.\n\nThis is reachable while scanning a USB storage device that identifies as\nan ATA device and advertises CDL support. No filesystem mount or\nuserspace access to the block device is required.\n\nOn upstream commit cee9395acd80 (\"Linux 7.3-rc1\"), a build-specific,\none-vCPU QEMU/Raw Gadget proof using QEMU-only multi-UDC allocator\nsampling executed a fixed proof command inside the guest and created a\nUID-0-owned marker during automatic enumeration, with KASLR and NX\nenabled.\n\nThe issue was independently found during security research at Drivesec\nS.r.l.\n\nCap the available length to the buffer size. Validate and consume the\nmode header and block descriptor lengths before using the page, and\nrequire the five bytes needed to access the CDL field."
          }
        ],
        "id": "CVE-2026-98232",
        "lastModified": "2026-10-06T09:18:10.703",
        "metrics": {},
        "published": "2026-10-06T09:18:10.703",
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        "vulnStatus": "Received"
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    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-08T16:49:42Z",
      "cve": "CVE-2026-98232",
      "id": "CVE-2026-98232",
      "initial_release_date": "2026-10-08T16:49:42Z",
      "product_status:known_not_affected": "347",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-98232",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-98232.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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.