CVE-2022-49076
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.…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.25%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.25% probability · 17th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0b7186d657ee55e2cdefae498f07d5c1961e8023Patch
- https://git.kernel.org/stable/c/2bbac98d0930e8161b1957dc0ec99de39ade1b3cPatch
- https://git.kernel.org/stable/c/5a9a1b24ddb510715f8f621263938186579a965cPatch
- https://git.kernel.org/stable/c/5f54364ff6cfcd14cddf5441c4a490bb28dd69f7Patch
- https://git.kernel.org/stable/c/9ca11bd8222a612de0d2f54d050bfcf61ae2883fPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.