FKIE_CVE-2026-98232

Vulnerability from fkie_nvd - Published: 2026-10-06 09:18 - Updated: 2026-10-06 09:18
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/39491a1ae93054fea10b4030180e5c797b2c0343
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3d676e458fe0c566f5a62753dc696b6a862fc412
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/60b0b8ce803e3c2b2a9e5485ab3f88599fb4c7a4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6233d0b3ef4623df0d6934dc8b93b161e9854f6b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/99a6e4a9176da456904b67dcbae6e77d122782b7
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/scsi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "39491a1ae93054fea10b4030180e5c797b2c0343",
              "status": "affected",
              "version": "1b22cfb14142aba7742d307c4f8d7006f919308c",
              "versionType": "git"
            },
            {
              "lessThan": "60b0b8ce803e3c2b2a9e5485ab3f88599fb4c7a4",
              "status": "affected",
              "version": "1b22cfb14142aba7742d307c4f8d7006f919308c",
              "versionType": "git"
            },
            {
              "lessThan": "6233d0b3ef4623df0d6934dc8b93b161e9854f6b",
              "status": "affected",
              "version": "1b22cfb14142aba7742d307c4f8d7006f919308c",
              "versionType": "git"
            },
            {
              "lessThan": "99a6e4a9176da456904b67dcbae6e77d122782b7",
              "status": "affected",
              "version": "1b22cfb14142aba7742d307c4f8d7006f919308c",
              "versionType": "git"
            },
            {
              "lessThan": "3d676e458fe0c566f5a62753dc696b6a862fc412",
              "status": "affected",
              "version": "1b22cfb14142aba7742d307c4f8d7006f919308c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/scsi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "lessThan": "6.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc4",
              "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\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",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/39491a1ae93054fea10b4030180e5c797b2c0343"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3d676e458fe0c566f5a62753dc696b6a862fc412"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/60b0b8ce803e3c2b2a9e5485ab3f88599fb4c7a4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6233d0b3ef4623df0d6934dc8b93b161e9854f6b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/99a6e4a9176da456904b67dcbae6e77d122782b7"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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