FKIE_CVE-2026-72030

Vulnerability from fkie_nvd - Published: 2026-08-15 06:21 - Updated: 2026-08-23 13:16
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: ata: libata-core: Reject an invalid concurrent positioning ranges count ata_dev_config_cpr() takes the number of range descriptors from buf[0] of the concurrent positioning ranges log (up to 255), which the device reports independently of the log size in the GPL directory. The count is then walked at a fixed 32-byte stride in two places with no bound: the log read here, and the INQUIRY VPD page B9h emitter, which writes one descriptor per range into the fixed 2048-byte ata_scsi_rbuf. A device reporting a count larger than its own log overflows the read buffer (up to 7704 bytes past a 512-byte slab), and a count above 62 overflows the response buffer on the emit side. Bound the count once, on probe, against both the log the device returned and the number of descriptors the VPD B9h response buffer can hold (ATA_DEV_MAX_CPR, derived from the rbuf size). Reject an out-of-range count with a warning; this keeps the emitter in bounds with no separate change there.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/01d7d321e6046f87ba270aeeffdc5260209bd91e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4c1e8ccd8655ee8cf1bcb1b7dfee72c9fa941fd4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4cb4b4dd8853c4ab3057efe238b2c34277772176
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/533a0b940f901c15e5cbbd4b5d66e871c209e8ce
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b1607f0ee5f5e53e0aa66f41794085b7cc98f5d1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d43efd1b5d976203e6f1ef26f67e8b1a7bc2751b
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/ata/libata-core.c",
            "drivers/ata/libata-scsi.c",
            "drivers/ata/libata.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "01d7d321e6046f87ba270aeeffdc5260209bd91e",
              "status": "affected",
              "version": "fe22e1c2f705676a705d821301fc52eecc2fe055",
              "versionType": "git"
            },
            {
              "lessThan": "4cb4b4dd8853c4ab3057efe238b2c34277772176",
              "status": "affected",
              "version": "fe22e1c2f705676a705d821301fc52eecc2fe055",
              "versionType": "git"
            },
            {
              "lessThan": "b1607f0ee5f5e53e0aa66f41794085b7cc98f5d1",
              "status": "affected",
              "version": "fe22e1c2f705676a705d821301fc52eecc2fe055",
              "versionType": "git"
            },
            {
              "lessThan": "4c1e8ccd8655ee8cf1bcb1b7dfee72c9fa941fd4",
              "status": "affected",
              "version": "fe22e1c2f705676a705d821301fc52eecc2fe055",
              "versionType": "git"
            },
            {
              "lessThan": "d43efd1b5d976203e6f1ef26f67e8b1a7bc2751b",
              "status": "affected",
              "version": "fe22e1c2f705676a705d821301fc52eecc2fe055",
              "versionType": "git"
            },
            {
              "lessThan": "533a0b940f901c15e5cbbd4b5d66e871c209e8ce",
              "status": "affected",
              "version": "fe22e1c2f705676a705d821301fc52eecc2fe055",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/ata/libata-core.c",
            "drivers/ata/libata-scsi.c",
            "drivers/ata/libata.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "lessThan": "5.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.184",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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\nata: libata-core: Reject an invalid concurrent positioning ranges count\n\nata_dev_config_cpr() takes the number of range descriptors from buf[0]\nof the concurrent positioning ranges log (up to 255), which the device\nreports independently of the log size in the GPL directory. The count is\nthen walked at a fixed 32-byte stride in two places with no bound: the\nlog read here, and the INQUIRY VPD page B9h emitter, which writes one\ndescriptor per range into the fixed 2048-byte ata_scsi_rbuf. A device\nreporting a count larger than its own log overflows the read buffer (up\nto 7704 bytes past a 512-byte slab), and a count above 62 overflows the\nresponse buffer on the emit side.\n\nBound the count once, on probe, against both the log the device returned\nand the number of descriptors the VPD B9h response buffer can hold\n(ATA_DEV_MAX_CPR, derived from the rbuf size). Reject an out-of-range\ncount with a warning; this keeps the emitter in bounds with no separate\nchange there."
    }
  ],
  "id": "CVE-2026-72030",
  "lastModified": "2026-08-23T13:16:37.597",
  "metrics": {},
  "published": "2026-08-15T06:21:09.200",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/01d7d321e6046f87ba270aeeffdc5260209bd91e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4c1e8ccd8655ee8cf1bcb1b7dfee72c9fa941fd4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4cb4b4dd8853c4ab3057efe238b2c34277772176"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/533a0b940f901c15e5cbbd4b5d66e871c209e8ce"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b1607f0ee5f5e53e0aa66f41794085b7cc98f5d1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d43efd1b5d976203e6f1ef26f67e8b1a7bc2751b"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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