Bug 2516786 (CVE-2026-74396) - CVE-2026-74396 kernel: RDMA/mlx5: Fix UMR XLT cleanup on ODP populate failure
Summary: CVE-2026-74396 kernel: RDMA/mlx5: Fix UMR XLT cleanup on ODP populate failure
Keywords:
Status: NEW
Alias: CVE-2026-74396
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-15 06:33 UTC by OSIDB Bzimport
Modified: 2026-08-20 20:49 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-08-15 06:33:25 UTC
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.


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