CVE-2023-53515 (GCVE-0-2023-53515)

Vulnerability from cvelistv5 – Published: 2025-10-01 11:46 – Updated: 2025-10-01 11:46
VLAI?
Title
virtio-mmio: don't break lifecycle of vm_dev
Summary
In the Linux kernel, the following vulnerability has been resolved: virtio-mmio: don't break lifecycle of vm_dev vm_dev has a separate lifecycle because it has a 'struct device' embedded. Thus, having a release callback for it is correct. Allocating the vm_dev struct with devres totally breaks this protection, though. Instead of waiting for the vm_dev release callback, the memory is freed when the platform_device is removed. Resulting in a use-after-free when finally the callback is to be called. To easily see the problem, compile the kernel with CONFIG_DEBUG_KOBJECT_RELEASE and unbind with sysfs. The fix is easy, don't use devres in this case. Found during my research about object lifetime problems.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7eb781b1bbb7136fe78fb8c28c1c223c61fa32b5 , < 97a2d55ead76358245b446efd87818e919196d7a (git)
Affected: 7eb781b1bbb7136fe78fb8c28c1c223c61fa32b5 , < b788ad3b2468512339c05f23692e36860264e674 (git)
Affected: 7eb781b1bbb7136fe78fb8c28c1c223c61fa32b5 , < 3ff54d904fafabd0912796785e53cce4e69ca123 (git)
Affected: 7eb781b1bbb7136fe78fb8c28c1c223c61fa32b5 , < 5b7d5c2dd664eb8b9a06ecbc06e28d39359c422e (git)
Affected: 7eb781b1bbb7136fe78fb8c28c1c223c61fa32b5 , < af5818c35173e096085c6ae2e3aac605d3d15e41 (git)
Affected: 7eb781b1bbb7136fe78fb8c28c1c223c61fa32b5 , < 2dcb368fe5a8eee498ca75c93a18ce2f3b0d6a8e (git)
Affected: 7eb781b1bbb7136fe78fb8c28c1c223c61fa32b5 , < 55c91fedd03d7b9cf0c5199b2eb12b9b8e95281a (git)
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    Linux Linux Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 4.19.293 , ≤ 4.19.* (semver)
Unaffected: 5.4.255 , ≤ 5.4.* (semver)
Unaffected: 5.10.192 , ≤ 5.10.* (semver)
Unaffected: 5.15.128 , ≤ 5.15.* (semver)
Unaffected: 6.1.47 , ≤ 6.1.* (semver)
Unaffected: 6.4.12 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio-mmio: don\u0027t break lifecycle of vm_dev\n\nvm_dev has a separate lifecycle because it has a \u0027struct device\u0027\nembedded. Thus, having a release callback for it is correct.\n\nAllocating the vm_dev struct with devres totally breaks this protection,\nthough. Instead of waiting for the vm_dev release callback, the memory\nis freed when the platform_device is removed. Resulting in a\nuse-after-free when finally the callback is to be called.\n\nTo easily see the problem, compile the kernel with\nCONFIG_DEBUG_KOBJECT_RELEASE and unbind with sysfs.\n\nThe fix is easy, don\u0027t use devres in this case.\n\nFound during my research about object lifetime problems."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-01T11:46:03.192Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/b788ad3b2468512339c05f23692e36860264e674"
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        }
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    "dateReserved": "2025-10-01T11:39:39.406Z",
    "dateUpdated": "2025-10-01T11:46:03.192Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}


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