ghsa-wf3x-qxfc-v57v
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
PCI: dwc: ep: Prevent changing BAR size/flags in pci_epc_set_bar()
In commit 4284c88fff0e ("PCI: designware-ep: Allow pci_epc_set_bar() update inbound map address") set_bar() was modified to support dynamically changing the backing physical address of a BAR that was already configured.
This means that set_bar() can be called twice, without ever calling clear_bar() (as calling clear_bar() would clear the BAR's PCI address assigned by the host).
This can only be done if the new BAR size/flags does not differ from the existing BAR configuration. Add these missing checks.
If we allow set_bar() to set e.g. a new BAR size that differs from the existing BAR size, the new address translation range will be smaller than the BAR size already determined by the host, which would mean that a read past the new BAR size would pass the iATU untranslated, which could allow the host to read memory not belonging to the new struct pci_epf_bar.
While at it, add comments which clarifies the support for dynamically changing the physical address of a BAR. (Which was also missing.)
{
"affected": [],
"aliases": [
"CVE-2024-58006"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-27T03:15:11Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: dwc: ep: Prevent changing BAR size/flags in pci_epc_set_bar()\n\nIn commit 4284c88fff0e (\"PCI: designware-ep: Allow pci_epc_set_bar() update\ninbound map address\") set_bar() was modified to support dynamically\nchanging the backing physical address of a BAR that was already configured.\n\nThis means that set_bar() can be called twice, without ever calling\nclear_bar() (as calling clear_bar() would clear the BAR\u0027s PCI address\nassigned by the host).\n\nThis can only be done if the new BAR size/flags does not differ from the\nexisting BAR configuration. Add these missing checks.\n\nIf we allow set_bar() to set e.g. a new BAR size that differs from the\nexisting BAR size, the new address translation range will be smaller than\nthe BAR size already determined by the host, which would mean that a read\npast the new BAR size would pass the iATU untranslated, which could allow\nthe host to read memory not belonging to the new struct pci_epf_bar.\n\nWhile at it, add comments which clarifies the support for dynamically\nchanging the physical address of a BAR. (Which was also missing.)",
"id": "GHSA-wf3x-qxfc-v57v",
"modified": "2025-02-27T03:34:03Z",
"published": "2025-02-27T03:34:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-58006"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3229c15d6267de8e704b4085df8a82a5af2d63eb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3708acbd5f169ebafe1faa519cb28adc56295546"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b5cacfd067060c75088363ed3e19779078be2755"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
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