GHSA-3qx8-rv27-j6gp
First published: Mon Dec 23 2024(Updated: )
An issue was identified in the `VmFd::create_device function`, leading to undefined behavior and miscompilations on rustc 1.82.0 and newer due to the function's violation of Rust's pointer safety rules. The function downcasted a mutable reference to its `struct kvm_create_device` argument to an immutable pointer, and then proceeded to pass this pointer to a mutating system call. Rustc 1.82.0 and newer elides subsequent reads of this structure's fields, meaning code will not see the value written by the kernel into the `fd` member. Instead, the code will observe the value that this field was initialized to prior to calling `VmFd::create_device` (usually, 0). The issue started in kvm-ioctls 0.1.0 and was fixed in 0.19.1 by correctly using a mutable pointer.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| rust/kvm-ioctls | <0.19.1 | 0.19.1 |
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Reference Links
- collector/github-advisory-latest
- source/GitHub
- alias/GHSA-3qx8-rv27-j6gp
- agent/software-canonical-lookup
- agent/references
- agent/severity
- agent/last-modified-date
- agent/weakness
- agent/first-publish-date
- agent/softwarecombine
- agent/type
- agent/tags
- agent/description
- agent/event
- package-manager/rust