In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: Use a memory barrier to enforce PTP WQ xmit submission tracking occurs after populating the metadata_map
Just simply reordering the functions mlx5e_ptp_metadata_map_put and
mlx5e_ptpsq_track_metadata in the mlx5e_txwqe_complete context is not good
enough since both the compiler and CPU are free to reorder these two
functions. If reordering does occur, the issue that was supposedly fixed by
7e3f3ba97e6c ("net/mlx5e: Track xmit submission to PTP WQ after populating
metadata map") will be seen. This will lead to NULL pointer dereferences in
mlx5e_ptpsq_mark_ts_cqes_undelivered in the NAPI polling context due to the
tracking list being populated before the metadata map.
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: Linux
Published: 2024-04-17T10:17:19.757Z
Updated: 2024-11-05T09:17:05.446Z
Reserved: 2024-02-19T14:20:24.183Z
Link: CVE-2024-26858
Vulnrichment
Updated: 2024-08-02T00:14:13.697Z
NVD
Status : Awaiting Analysis
Published: 2024-04-17T11:15:08.840
Modified: 2024-11-21T09:03:13.893
Link: CVE-2024-26858
Redhat