{"id":"CVE-2026-74396","title":"RDMA/mlx5: Fix UMR XLT cleanup on ODP populate failure","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Fix UMR XLT cleanup on ODP populate failure\n\nmlx5r_umr_update_xlt() allocates and DMA maps an XLT buffer with\nmlx5r_umr_create_xlt(). The buffer is released …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 1efe8c0670d6a6883faa09c9abc746c741f5664a < ffa85a2c197935ace6f1634ad9eb0a44bc615670","Linux >= 1efe8c0670d6a6883faa09c9abc746c741f5664a < 9619909d4869afe720904c6888a289b9ac3055b8","Linux >= 1efe8c0670d6a6883faa09c9abc746c741f5664a < 1eae35b37923cb71b0cb5136d00671440d488b9f","Linux 6.16"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T18:55:21.919337Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:05:41.026Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74396","references":[{"url":"https://git.kernel.org/stable/c/ffa85a2c197935ace6f1634ad9eb0a44bc615670"},{"url":"https://git.kernel.org/stable/c/9619909d4869afe720904c6888a289b9ac3055b8"},{"url":"https://git.kernel.org/stable/c/1eae35b37923cb71b0cb5136d00671440d488b9f"}],"tags":["cve.org"],"epss":0.00732,"epssPercentile":0.53431,"ingestedAt":"2026-10-16T19:46:24.370Z","slug":"CVE-2026-74396","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Fix UMR XLT cleanup on ODP populate failure\n\nmlx5r_umr_update_xlt() allocates and DMA maps an XLT buffer with\nmlx5r_umr_create_xlt(). The buffer is released by the common cleanup path\nthrough mlx5r_umr_unmap_free_xlt().\n\nAfter mlx5_odp_populate_xlt() became fallible, its error path returned\ndirectly and skipped that cleanup. This leaks the XLT DMA mapping and\nbuffer. If the emergency XLT page was used, it also leaves\nxlt_emergency_page_mutex locked.\n\nBreak out of the loop so execution falls through the existing cleanup path.\n\n## Affected\n\n- `Linux >= 1efe8c0670d6a6883faa09c9abc746c741f5664a < ffa85a2c197935ace6f1634ad9eb0a44bc615670`\n- `Linux >= 1efe8c0670d6a6883faa09c9abc746c741f5664a < 9619909d4869afe720904c6888a289b9ac3055b8`\n- `Linux >= 1efe8c0670d6a6883faa09c9abc746c741f5664a < 1eae35b37923cb71b0cb5136d00671440d488b9f`\n- `Linux 6.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}