{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "9e91f8a6c8688e27f4ccce7db457da87d6458836"
            },
            {
              "fixed": "3088e41292fecf132f85f79af5ee4d620b9ff1b4"
            },
            {
              "fixed": "5dc0b2a9af95a97861c1bffaf1687a3173e395c5"
            },
            {
              "fixed": "05ec76cfbce653e07cec19b9b8b20e33449d5d87"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.16.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89486.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipmi: Fix use-after-free of cmd_rcvr in _ipmi_destroy_user()\n\nCommit 9e91f8a6c868 (\"ipmi:msghandler: Remove srcu for the\nipmi_interfaces list\") dropped the synchronize_rcu() between unlinking\nthe command receivers from intf-\u003ecmd_rcvrs and freeing them, updating\nonly the comment that explains why the barrier is needed.\n\nThe cmd_rcvrs list is still traversed under plain RCU: find_cmd_rcvr()\nwalks it inside rcu_read_lock(), and handle_ipmb_get_msg_cmd() borrows\nrcvr-\u003euser from that lookup within the same read-side section. Without\nthe grace period, _ipmi_destroy_user() can kfree() a cmd_rcvr while a\nreader still holds a pointer to it, causing a use-after-free.\n\nThe rework only made srcu unnecessary for the interfaces list; the\ncmd_rcvrs list still relies on plain RCU. Restore the synchronize_rcu()\nbefore freeing the receivers.",
  "id": "CVE-2026-89486",
  "modified": "2026-09-13T03:30:46.850442155Z",
  "published": "2026-09-11T19:43:40.116Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/05ec76cfbce653e07cec19b9b8b20e33449d5d87"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3088e41292fecf132f85f79af5ee4d620b9ff1b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5dc0b2a9af95a97861c1bffaf1687a3173e395c5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89486.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89486"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "ipmi: Fix use-after-free of cmd_rcvr in _ipmi_destroy_user()"
}