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21 lines
1.6 KiB
JSON
21 lines
1.6 KiB
JSON
{
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"id": "CVE-2024-58093",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2025-04-16T15:15:53.220",
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"lastModified": "2025-04-17T20:22:16.240",
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"vulnStatus": "Awaiting Analysis",
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"cveTags": [],
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/ASPM: Fix link state exit during switch upstream function removal\n\nBefore 456d8aa37d0f (\"PCI/ASPM: Disable ASPM on MFD function removal to\navoid use-after-free\"), we would free the ASPM link only after the last\nfunction on the bus pertaining to the given link was removed.\n\nThat was too late. If function 0 is removed before sibling function,\nlink->downstream would point to free'd memory after.\n\nAfter above change, we freed the ASPM parent link state upon any function\nremoval on the bus pertaining to a given link.\n\nThat is too early. If the link is to a PCIe switch with MFD on the upstream\nport, then removing functions other than 0 first would free a link which\nstill remains parent_link to the remaining downstream ports.\n\nThe resulting GPFs are especially frequent during hot-unplug, because\npciehp removes devices on the link bus in reverse order.\n\nOn that switch, function 0 is the virtual P2P bridge to the internal bus.\nFree exactly when function 0 is removed -- before the parent link is\nobsolete, but after all subordinate links are gone.\n\n[kwilczynski: commit log]"
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}
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],
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"metrics": {},
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/cbf937dcadfd571a434f8074d057b32cd14fbea5",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}
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]
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} |