CVE-2026-74396
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix UMR XLT cleanup on ODP populate failure mlx5r_umr_update_xlt() allocates and DMA maps an XLT buffer with mlx5r_umr_create_xlt(). The buffer is released by the common cleanup path through mlx5r_umr_unmap_free_xlt(). After mlx5_odp_populate_xlt() became fallible, its error path returned directly and skipped that cleanup. This leaks the XLT DMA mapping and buffer. If the emergency XLT page was used, it also leaves xlt_emergency_page_mutex locked. Break out of the loop so execution falls through the existing cleanup path.
How to fix
- Linux Linuxffa85a2c197935ace6f1634ad9eb0a44bc615670, 9619909d4869afe720904c6888a289b9ac3055b8, 1eae35b37923cb71b0cb5136d00671440d488b9f or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 1efe8c0670d6a6883faa09c9abc746c741f5664a ≤ v < ffa85a2c197935ace6f1634ad9eb0a44bc615670, 1efe8c0670d6a6883faa09c9abc746c741f5664a ≤ v < 9619909d4869afe720904c6888a289b9ac3055b8, 1efe8c0670d6a6883faa09c9abc746c741f5664a ≤ v < 1eae35b37923cb71b0cb5136d00671440d488b9f, 6.16 | ffa85a2c197935ace6f1634ad9eb0a44bc615670, 9619909d4869afe720904c6888a289b9ac3055b8, 1eae35b37923cb71b0cb5136d00671440d488b9f |
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