vfio/pci: Create persistent INTx handler
In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Create persistent INTx handler A vulnerability exists where the eventfd for INTx signaling can be deconfigured, which unregisters the IRQ handler but still allows eventfds to be signaled with a NULL context through the SET_IRQS ioctl or through unmask irqfd if the device interrupt is pending. Ideally this could be solved with some additional locking; the igate mutex serializes the ioctl and config space accesses, and the interrupt handler is unregistered relative to the trigger, but the irqfd path runs asynchronous to those. The igate mutex cannot be acquired from the atomic context of the eventfd wake function. Disabling the irqfd relative to the eventfd registration is potentially incompatible with existing userspace. As a result, the solution implemented here moves configuration of the INTx interrupt handler to track the lifetime of the INTx context object and irq_type configuration, rather than registration of a particular trigger eventfd. Synchronization is added between the ioctl path and eventfd_signal() wrapper such that the eventfd trigger can be dynamically updated relative to in-flight interrupts or irqfd callbacks.
CVE-2024-26812
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2024-26812
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "89e1f7d4c66d85f42c3d52ea3866eb10cadf6153",
"lessThan": "b18fa894d615c8527e15d96b76c7448800e13899",
"versionType": "git"
},
{
"status": "affected",
"version": "89e1f7d4c66d85f42c3d52ea3866eb10cadf6153",
"lessThan": "27d40bf72dd9a6600b76ad05859176ea9a1b4897",
"versionType": "git"
},
{
"status": "affected",
"version": "89e1f7d4c66d85f42c3d52ea3866eb10cadf6153",
"lessThan": "4cb0d7532126d23145329826c38054b4e9a05e7c",
"versionType": "git"
},
{
"status": "affected",
"version": "89e1f7d4c66d85f42c3d52ea3866eb10cadf6153",
"lessThan": "7d29d4c72c1e196cce6969c98072a272d1a703b3",
"versionType": "git"
},
{
"status": "affected",
"version": "89e1f7d4c66d85f42c3d52ea3866eb10cadf6153",
"lessThan": "69276a555c740acfbff13fb5769ee9c92e1c828e",
"versionType": "git"
},
{
"status": "affected",
"version": "89e1f7d4c66d85f42c3d52ea3866eb10cadf6153",
"lessThan": "4c089cefe30924fbe20dd1ee92774ea1f5eca834",
"versionType": "git"
},
{
"status": "affected",
"version": "89e1f7d4c66d85f42c3d52ea3866eb10cadf6153",
"lessThan": "0e09cf81959d9f12b75ad5c6dd53d237432ed034",
"versionType": "git"
},
{
"status": "affected",
"version": "89e1f7d4c66d85f42c3d52ea3866eb10cadf6153",
"lessThan": "18c198c96a815c962adc2b9b77909eec0be7df4d",
"versionType": "git"
}
],
"programFiles": [
"drivers/vfio/pci/vfio_pci_intrs.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.4.274",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.215",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.154",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.84",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.24",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.7.12",
"versionType": "semver",
"lessThanOrEqual": "6.7.*"
},
{
"status": "unaffected",
"version": "6.8.3",
"versionType": "semver",
"lessThanOrEqual": "6.8.*"
},
{
"status": "unaffected",
"version": "6.9",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/vfio/pci/vfio_pci_intrs.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-26812
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #26428 · Revision 1
- Added to Heist Feed
- Publisher date