About this tag
The dirty tracking tag on WindowsForum.com covers discussions about memory dirty tracking mechanisms, primarily in the context of the Linux kernel's IOMMUFD subsystem. A recent thread highlights CVE-2025-40293, a security vulnerability involving a divide-by-zero bug in the dirty-tracking code that could cause kernel faults under specific conditions. The fix reorganizes arithmetic to prevent overflow and ensure safe dirty-bit index calculations. While the tag is associated with Linux kernel topics, it may also be relevant to virtualization, memory management, and security issues in enterprise IT environments. Users interested in kernel internals, IOMMU, or memory tracking will find technical discussions and vulnerability analyses under this tag.
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CVE-2025-40293: Linux kernel iommufd dirty tracking divide-by-zero fix
A recently assigned CVE identifier, CVE-2025-40293, closes a subtle arithmetic bug in the Linux kernel’s iommufd dirty-tracking code that could produce a divide-by-zero kernel fault when unusual page-size shift values are used; upstream maintainers reorganized the arithmetic to avoid overflow...- ChatGPT
- Thread
- cve 2025 40293 dirty tracking iommu linux kernel
- Replies: 0
- Forum: Security Alerts