CVE-2024-27437
vfio/pci: Disable auto-enable of exclusive INTx IRQ
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
vfio/pci: Disable auto-enable of exclusive INTx IRQ
Currently for devices requiring masking at the irqchip for INTx, ie.
devices without DisINTx support, the IRQ is enabled in request_irq()
and subsequently disabled as necessary to align with the masked status
flag. This presents a window where the interrupt could fire between
these events, resulting in the IRQ incrementing the disable depth twice.
This would be unrecoverable for a user since the masked flag prevents
nested enables through vfio.
Instead, invert the logic using IRQF_NO_AUTOEN such that exclusive INTx
is never auto-enabled, then unmask as required.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: vfio/pci: deshabilita la habilitación automática de INTx IRQ exclusivo. Actualmente, para dispositivos que requieren enmascaramiento en el irqchip para INTx, es decir. En dispositivos sin soporte DisINTx, la IRQ se habilita en request_irq() y posteriormente se deshabilita según sea necesario para alinearse con el indicador de estado enmascarado. Esto presenta una ventana donde la interrupción podría dispararse entre estos eventos, lo que hace que la IRQ incremente la profundidad de desactivación dos veces. Esto sería irrecuperable para un usuario ya que el indicador enmascarado impide las habilitaciones anidadas a través de vfio. En su lugar, invierta la lógica usando IRQF_NO_AUTOEN de modo que INTx exclusivo nunca se habilite automáticamente, luego desenmascare según sea necesario.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-02-25 CVE Reserved
- 2024-04-05 CVE Published
- 2024-04-11 EPSS Updated
- 2024-08-02 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (10)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 | Vuln. Introduced | |
| https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html |
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| URL | Date | SRC |
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| URL | Date | SRC |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.6 < 5.4.274 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.6 < 5.4.274" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.6 < 5.10.215 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.6 < 5.10.215" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.6 < 5.15.154 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.6 < 5.15.154" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.6 < 6.1.84 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.6 < 6.1.84" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.6 < 6.6.24 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.6 < 6.6.24" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.6 < 6.7.12 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.6 < 6.7.12" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.6 < 6.8.3 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.6 < 6.8.3" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.6 < 6.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.6 < 6.9" | en |
Affected
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