CVE-2026-80732 (GCVE-0-2026-80732)

Vulnerability from cvelistv5 – Published: 2026-09-03 08:21 – Updated: 2026-09-04 04:58
VLAI
Title
ata: pata_sl82c105: fix bridge revision use-after-free
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 , < 1268ca9418e2217f2b60705cf4a280b689b26678 (git)
Affected: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 , < a626dfca96041842053cf2d1efceb436c4cd8dcf (git)
Affected: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 , < 5ef87b1b4656d675440ceab32a56e69ad958d3a1 (git)
Affected: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 , < fa0dca89b4fb0909ffda7b9ab6051af33270f95e (git)
Affected: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 , < dc711fb137b33c12e6ca22b6a9c9b9f21d49e4de (git)
Affected: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 , < a837deeaa37cc3f0e8c4e5c096787047f272c956 (git)
Affected: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 , < 56fd78c8c820f527f8003e379ab71004b2e79a44 (git)
Affected: 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 , < 7700a31039cdc6715cb6cce7e7a664ee4e945f67 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.23
Unaffected: 0 , < 2.6.23 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.152 , ≤ 6.6.* (semver)
Unaffected: 6.12.104 , ≤ 6.12.* (semver)
Unaffected: 6.18.45 , ≤ 6.18.* (semver)
Unaffected: 7.1.9 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "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."
        }
      ],
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            "version": "3.1"
          },
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              "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."
            }
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      "cve": "CVE-2026-80732",
      "id": "msrc_CVE-2026-80732",
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      "product_status:fixed": "1",
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      "title": "ata: pata_sl82c105: fix bridge revision use-after-free",
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        "lastModified": "2026-09-04T05:17:13.770",
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                "confidentialityImpact": "HIGH",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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  • 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.


Detection rules are retrieved from Rulezet.


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.