{
  "cveId": "CVE-2026-98524",
  "url": "https://patchblox.com/security/cve/CVE-2026-98524",
  "summary": "CVE-2026-98524 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-98524, released October 19, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "rds: ib: Clear the sg list when mapping an MR fails",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  rds: ib: Clear the sg list when mapping an MR fails  rds_ib_map_frmr() stores the caller\u0027s scatterlist in the MR before DMA mapping and registration can fail. On failure, __rds_rdma_map() unpins the pages and frees the scatterlist, but rds_ib_free_frmr() can still return the MR to the pool with the stale pointer set.  This leaves the pool with a dangling scatterlist and can lead to local privilege escalation. KASAN detects the resulting use-after-free when the MR is later torn down:  BUG: KASAN: slab-use-after-free in __rds_ib_teardown_mr Read of size 8  Call Trace:  __rds_ib_teardown_mr  rds_ib_unreg_frmr  rds_ib_flush_mr_pool  rds_ib_flush_mrs  rds_free_mr  rds_setsockopt  Store the scatterlist in the MR only after DMA mapping succeeds. If DMA mapping fails, return directly while the MR fields remain clear; the caller keeps ownership of the scatterlist and its pinned pages. If a later registration step fails, unmap the scatterlist and clear the MR fields before returning.",
  "published": "2026-10-18T16:17:03Z",
  "severity": "Important",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00171,
  "epssPercentile": 0.06535,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98524",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.190-1",
      "fix": "DEBIAN-CVE-2026-98524",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98524",
      "released": "2026-10-19T16:27:52Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.113-1",
      "fix": "DEBIAN-CVE-2026-98524",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98524",
      "released": "2026-10-19T16:27:52Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.9-1",
      "fix": "DEBIAN-CVE-2026-98524",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98524",
      "released": "2026-10-19T16:27:52Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.113-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-98524",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98524",
      "released": "2026-10-19T16:27:52Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}