{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-98524",
  "modified": "2026-10-19T04:30:01Z",
  "upstream": [
    "CVE-2026-98524"
  ],
  "published": "2026-10-18T15:22:13Z",
  "summary": "rds: ib: Clear the sg list when mapping an MR fails",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrds: ib: Clear the sg list when mapping an MR fails\n\nrds_ib_map_frmr() stores the caller's scatterlist in the MR before DMA\nmapping and registration can fail. On failure, __rds_rdma_map() unpins\nthe pages and frees the scatterlist, but rds_ib_free_frmr() can still\nreturn the MR to the pool with the stale pointer set.\n\nThis leaves the pool with a dangling scatterlist and can lead to local\nprivilege escalation. KASAN detects the resulting use-after-free when the\nMR is later torn down:\n\nBUG: KASAN: slab-use-after-free in __rds_ib_teardown_mr\nRead of size 8\n\nCall Trace:\n __rds_ib_teardown_mr\n rds_ib_unreg_frmr\n rds_ib_flush_mr_pool\n rds_ib_flush_mrs\n rds_free_mr\n rds_setsockopt\n\nStore the scatterlist in the MR only after DMA mapping succeeds. If DMA\nmapping fails, return directly while the MR fields remain clear; the caller\nkeeps ownership of the scatterlist and its pinned pages. If a later\nregistration step fails, unmap the scatterlist and clear the MR fields\nbefore returning.",
  "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": "6.1.189",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-98524"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1be3211e6ac77adbb1eac01314d989d243b32c59"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c42d316163f89cd23de2f3e24558177a8c29bad8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8dca3c81344532a7f05edb3d12f31f3009410a90"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/49ba5ed0129906e0362c2e4b5e21c89b2a41e115"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4468df5bcdef959fd96494e9968f323561a45f4c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e2ee0616260080376123997488b5cf8a3870b8d9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b36d32f30c3f1e58e3a5ae79d0f52836a316b36e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/58eb1b3325edac42dc6df72c80962bd53a3c8ca7"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-10-18T15:22:13Z"
  }
}