{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-21732",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-21732"
  ],
  "published": "2025-02-27T02:12:01Z",
  "summary": "RDMA/mlx5: Fix a race for an ODP MR which leads to CQE with error",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Fix a race for an ODP MR which leads to CQE with error\n\nThis patch addresses a race condition for an ODP MR that can result in a\nCQE with an error on the UMR QP.\n\nDuring the __mlx5_ib_dereg_mr() flow, the following sequence of calls\noccurs:\n\nmlx5_revoke_mr()\n mlx5r_umr_revoke_mr()\n mlx5r_umr_post_send_wait()\n\nAt this point, the lkey is freed from the hardware's perspective.\n\nHowever, concurrently, mlx5_ib_invalidate_range() might be triggered by\nanother task attempting to invalidate a range for the same freed lkey.\n\nThis task will:\n - Acquire the umem_odp->umem_mutex lock.\n - Call mlx5r_umr_update_xlt() on the UMR QP.\n - Since the lkey has already been freed, this can lead to a CQE error,\n   causing the UMR QP to enter an error state [1].\n\nTo resolve this race condition, the umem_odp->umem_mutex lock is now also\nacquired as part of the mlx5_revoke_mr() scope.  Upon successful revoke,\nwe set umem_odp->private which points to that MR to NULL, preventing any\nfurther invalidation attempts on its lkey.\n\n[1] From dmesg:\n\n   infiniband rocep8s0f0: dump_cqe:277:(pid 0): WC error: 6, Message: memory bind operation error\n   cqe_dump: 00000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n   cqe_dump: 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n   cqe_dump: 00000020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n   cqe_dump: 00000030: 00 00 00 00 08 00 78 06 25 00 11 b9 00 0e dd d2\n\n   WARNING: CPU: 15 PID: 1506 at drivers/infiniband/hw/mlx5/umr.c:394 mlx5r_umr_post_send_wait+0x15a/0x2b0 [mlx5_ib]\n   Modules linked in: ip6table_mangle ip6table_natip6table_filter ip6_tables iptable_mangle xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink xt_addrtype iptable_nat nf_nat br_netfilter rpcsec_gss_krb5 auth_rpcgss oid_registry overlay rpcrdma rdma_ucm ib_iser libiscsi scsi_transport_iscsi rdma_cm iw_cm ib_umad ib_ipoib ib_cm mlx5_ib ib_uverbs ib_core fuse mlx5_core\n   CPU: 15 UID: 0 PID: 1506 Comm: ibv_rc_pingpong Not tainted 6.12.0-rc7+ #1626\n   Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n   RIP: 0010:mlx5r_umr_post_send_wait+0x15a/0x2b0 [mlx5_ib]\n   [..]\n   Call Trace:\n   <TASK>\n   mlx5r_umr_update_xlt+0x23c/0x3e0 [mlx5_ib]\n   mlx5_ib_invalidate_range+0x2e1/0x330 [mlx5_ib]\n   __mmu_notifier_invalidate_range_start+0x1e1/0x240\n   zap_page_range_single+0xf1/0x1a0\n   madvise_vma_behavior+0x677/0x6e0\n   do_madvise+0x1a2/0x4b0\n   __x64_sys_madvise+0x25/0x30\n   do_syscall_64+0x6b/0x140\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": null,
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-21732"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b13d32786acabf70a7b04ed24b7468fc3c82977c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5297f5ddffef47b94172ab0d3d62270002a3dcc1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/abb604a1a9c87255c7a6f3b784410a9707baf467"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}