CVE-2026-74396

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1efe8c0670d6a6883faa09c9abc746c741f5664a < ffa85a2c197935ace6f1634ad9eb0a44bc615670affected
LinuxLinux1efe8c0670d6a6883faa09c9abc746c741f5664a < 9619909d4869afe720904c6888a289b9ac3055b8affected
LinuxLinux1efe8c0670d6a6883faa09c9abc746c741f5664a < 1eae35b37923cb71b0cb5136d00671440d488b9faffected
LinuxLinux6.16affected
LinuxLinux0 < 6.16unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References