CVE-2026-74396

RDMA/mlx5: Fix UMR XLT cleanup on ODP populate failure

State: Published
Severity: 7.5 High
Published: Aug 15, 2026
Updated: Oct 16, 2026
Reserved: Aug 15, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	1efe8c0670d6a6883faa09c9abc746c741f5664a to before ffa85a2c197935ace6f1634ad9eb0a44bc615670Affected 1efe8c0670d6a6883faa09c9abc746c741f5664a to before 9619909d4869afe720904c6888a289b9ac3055b8Affected 1efe8c0670d6a6883faa09c9abc746c741f5664a to before 1eae35b37923cb71b0cb5136d00671440d488b9fAffected
LinuxLinux	6.16Affected before 6.16Not affected 6.18.40 through 6.18.Not affected 7.1.5 through 7.1.Not affected 7.2 and laterNot affected

References

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