CVE-2022-49076
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/hfi1: Fix use-after-free bug for mm struct Under certain conditions, such as MPI_Abort, the hfi1 cleanup code may represent the last reference held on the task mm. hfi1_mmu_rb_unregister() then drops the last reference and the mm is freed before the final use in hfi1_release_user_pages(). A new task may allocate the mm structure while it is still being used, resulting in problems. One manifestation is corruption of the mmap_sem counter leading to a hang in down_write(). Another is corruption of an mm struct that is in use by another task.
How to fix
- linux linux_kernel5.10.111, 5.15.34, 5.16.20, 5.17.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.9.12 ≤ v < 5.10.111, 5.11 ≤ v < 5.15.34, 5.16 ≤ v < 5.16.20, 5.17 ≤ v < 5.17.3, 5.18 | 5.10.111, 5.15.34, 5.16.20, 5.17.3 |
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