Skip to content
Heist/ feed
Back to feed
HighFix available

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

Type: advisorySources: OSV

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.

Products
Kernel
Affected versions
Not specified
Fixed versions
6.18.40, 7.1.5
CVEs
CVE-2026-74396
Confirmed fixed CVEs
Not specified
Updated in this feed
4 Nov 2026, 03:55 UTC · Revision 1

Source evidence

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

core-osv · Original source

Published 15 Aug 2026, 05:59 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.

osv:CVE-2026-74396

Kernel

Fixed versions: 6.18.40, 7.1.5

Complete source record
{
  "id": "04be4f572fa5913eb1ab8154e994a8218d711cad1a1dbe5427a9c777a59bb399",
  "url": "https://osv.dev/vulnerability/CVE-2026-74396",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "RDMA/mlx5: Fix UMR XLT cleanup on ODP populate failure",
    "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.",
    "evidence": "osv:CVE-2026-74396",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.40",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-74396",
      "aliases": [
        "CVE-2026-74396"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1efe8c0670d6a6883faa09c9abc746c741f5664a"
                },
                {
                  "fixed": "ffa85a2c197935ace6f1634ad9eb0a44bc615670"
                },
                {
                  "fixed": "9619909d4869afe720904c6888a289b9ac3055b8"
                },
                {
                  "fixed": "1eae35b37923cb71b0cb5136d00671440d488b9f"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74396.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.16.0"
                },
                {
                  "fixed": "6.18.40"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74396.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:33.017317871Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1eae35b37923cb71b0cb5136d00671440d488b9f",
        "https://git.kernel.org/stable/c/9619909d4869afe720904c6888a289b9ac3055b8",
        "https://git.kernel.org/stable/c/ffa85a2c197935ace6f1634ad9eb0a44bc615670",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74396.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-74396",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74396.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-74396",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 500188,
  "published_at": "2026-08-15T05:59:08.694+00:00"
}