CVE-2026-80732 (GCVE-0-2026-80732)
Vulnerability from cvelistv5
Published
2026-09-03 08:21
Modified
2026-09-04 04:58
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ata: pata_sl82c105: fix bridge revision use-after-free pci_get_slot() returns a referenced PCI device. Commit 44c10138fd4b ("PCI: Change all drivers to use pci_device->revision") replaced a configuration-space read with direct access to the cached revision field, but left that access after pci_dev_put(). The bridge may therefore be freed before its revision is read. Read the revision before dropping the reference.
References
Impacted products
Vendor Product Version
Linux Linux Version: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65
Version: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65
Version: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65
Version: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65
Version: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65
Version: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65
Version: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65
Version: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/ata/pata_sl82c105.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.23"
            },
            {
              "lessThan": "2.6.23",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.265",
                  "versionStartIncluding": "2.6.23",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "2.6.23",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "2.6.23",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.152",
                  "versionStartIncluding": "2.6.23",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.104",
                  "versionStartIncluding": "2.6.23",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.45",
                  "versionStartIncluding": "2.6.23",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.9",
                  "versionStartIncluding": "2.6.23",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "2.6.23",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nata: pata_sl82c105: fix bridge revision use-after-free\n\npci_get_slot() returns a referenced PCI device. Commit 44c10138fd4b\n(\"PCI: Change all drivers to use pci_device-\u003erevision\") replaced a\nconfiguration-space read with direct access to the cached revision field,\nbut left that access after pci_dev_put(). The bridge may therefore be freed\nbefore its revision is read.\n\nRead the revision before dropping the reference."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - sl82c105_bridge_revision() is only reached from sl82c105_init_one() during PCI driver probe of onboard SL82C105 hardware, triggered by boot enumeration, udev, or local module/sysfs bind; no network or adjacent protocol path exists.\nAC:L - Once CONFIG_PATA_WINBOND and matching Winbond W83C553 bridge hardware are present, the UAF is a deterministic, synchronous read after pci_dev_put() on every successful probe path\u2014no race, layout dependency, or victim state beyond standard probe.\nPR:L - Probe is initiated automatically by kernel PCI enumeration and udev during boot or hotplug on systems with SL82C105 storage (Netwinder, briq, legacy embedded), so reaching the bug does not require admin action; only local presence on such a host is needed.\nUI:N - Driver probe runs automatically during boot enumeration or udev module load when matching PCI hardware is present; no administrator or victim must mount media, open files, or perform any interactive action.\nS:U - Corrupting or reading freed pci_dev memory affects only the host kernel address space, yielding a standard local kernel compromise or panic rather than crossing a VM, hypervisor, or IOMMU boundary.\nC:H - Reading bridge-\u003erevision after pci_dev_put() is a use-after-free of struct pci_dev; if the allocation is reused, the attacker obtains a kernel memory disclosure primitive and can read adjacent freed data.\nI:H - UAF of struct pci_dev enables heap-spray reclamation of the freed object, giving attacker-controlled contents for subsequent kernel dereferences and a well-established path to arbitrary write and privilege escalation.\nA:H - Dereferencing a potentially freed pci_dev during probe can immediately oops or panic the kernel; even without full exploitation, UAF corruption commonly crashes the system on affected legacy embedded hosts."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T04:58:18.567Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1268ca9418e2217f2b60705cf4a280b689b26678"
        },
        {
          "url": "https://git.kernel.org/stable/c/a626dfca96041842053cf2d1efceb436c4cd8dcf"
        },
        {
          "url": "https://git.kernel.org/stable/c/5ef87b1b4656d675440ceab32a56e69ad958d3a1"
        },
        {
          "url": "https://git.kernel.org/stable/c/fa0dca89b4fb0909ffda7b9ab6051af33270f95e"
        },
        {
          "url": "https://git.kernel.org/stable/c/dc711fb137b33c12e6ca22b6a9c9b9f21d49e4de"
        },
        {
          "url": "https://git.kernel.org/stable/c/a837deeaa37cc3f0e8c4e5c096787047f272c956"
        },
        {
          "url": "https://git.kernel.org/stable/c/56fd78c8c820f527f8003e379ab71004b2e79a44"
        },
        {
          "url": "https://git.kernel.org/stable/c/7700a31039cdc6715cb6cce7e7a664ee4e945f67"
        }
      ],
      "title": "ata: pata_sl82c105: fix bridge revision use-after-free",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80732",
    "datePublished": "2026-09-03T08:21:49.526Z",
    "dateReserved": "2026-08-26T14:34:25.789Z",
    "dateUpdated": "2026-09-04T04:58:18.567Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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