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CVE-2024-26810 In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Lock external INTx masking ops Mask…

Description

In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Lock external INTx masking ops Mask operations through config space changes to DisINTx may race INTx configuration changes via ioctl. Create wrappers that add locking for paths outside of the core interrupt code. In particular, irq_type is updated holding igate, therefore testing is_intx() requires holding igate. For example clearing DisINTx from config space can otherwise race changes of the interrupt configuration. This aligns interfaces which may trigger the INTx eventfd into two camps, one side serialized by igate and the other only enabled while INTx is configured. A subsequent patch introduces synchronization for the latter flows.

Affected products and versions

Product Affected versions Fixed in
Linux 6.9 earliest → < 6.9 6.9
Linux 6.8 earliest → < 6.8.3 6.8.3
Linux 6.7 earliest → < 6.7.12 6.7.12
Linux 6.6 earliest → < 6.6.24 6.6.24
Linux 6.1 earliest → < 6.1.84 6.1.84
Linux 5.15 earliest → < 5.15.154 5.15.154
Linux 5.10 earliest → < 5.10.215 5.10.215
Linux 5.4 earliest → < 5.4.274 5.4.274
Linux 3.6 No fix stated
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Product Affected versions Fixed in
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem 1.1 earliest → < 1.1.1 1.1.1

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