FKIE_CVE-2023-53515

Vulnerability from fkie_nvd - Published: 2025-10-01 12:15 - Updated: 2026-01-26 20:11
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: 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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2dcb368fe5a8eee498ca75c93a18ce2f3b0d6a8ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3ff54d904fafabd0912796785e53cce4e69ca123Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/55c91fedd03d7b9cf0c5199b2eb12b9b8e95281aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5b7d5c2dd664eb8b9a06ecbc06e28d39359c422ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/97a2d55ead76358245b446efd87818e919196d7aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/af5818c35173e096085c6ae2e3aac605d3d15e41Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b788ad3b2468512339c05f23692e36860264e674Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 4.15
linux linux_kernel 4.15
linux linux_kernel 4.15
linux linux_kernel 4.15
linux linux_kernel 4.15
linux linux_kernel 4.15
linux linux_kernel 4.15
linux linux_kernel 4.15
linux linux_kernel 6.5
linux linux_kernel 6.5
linux linux_kernel 6.5
linux linux_kernel 6.5
linux linux_kernel 6.5
linux linux_kernel 6.5
To clipboard 

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      "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."
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  "id": "CVE-2023-53515",
  "lastModified": "2026-01-26T20:11:08.987",
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