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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74396
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:41 UTC
Updated2026-08-15 06:22:41 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1efe8c0670d6a6883faa09c9abc746c741f5664a ffa85a2c197935ace6f1634ad9eb0a44bc615670 git Not specified
CNA Linux Linux affected 1efe8c0670d6a6883faa09c9abc746c741f5664a 9619909d4869afe720904c6888a289b9ac3055b8 git Not specified
CNA Linux Linux affected 1efe8c0670d6a6883faa09c9abc746c741f5664a 1eae35b37923cb71b0cb5136d00671440d488b9f git Not specified
CNA Linux Linux affected 6.16 Not specified
CNA Linux Linux unaffected 6.16 semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9619909d4869afe720904c6888a289b9ac3055b8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ffa85a2c197935ace6f1634ad9eb0a44bc615670 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1eae35b37923cb71b0cb5136d00671440d488b9f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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