{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  params: fix charp corruption on allocation failure  param_set_charp() stores charp parameters in allocated memory after slab is available, and releases the previous value when the parameter is updated.  The previous value is released before the replacement allocation succeeds. If kmalloc_parameter() fails, the setter returns -ENOMEM with the parameter left as NULL.  Failing zswap's compressor update before zswap is initialized can later trigger:    BUG: kernel NULL pointer dereference, address: 0000000000000000   RIP: 0010:strcmp+0x10/0x30   Call Trace:     zswap_setup+0x3b1/0x490     zswap_enabled_param_set+0x5b/0xa0     param_attr_store+0x93/0xe0     module_attr_store+0x1c/0x30     kernfs_fop_write_iter+0x116/0x1f0  Allocate and copy the replacement first, then replace the parameter value only after allocation succeeds.",
  "id": "DEBIAN-CVE-2026-89552",
  "modified": "2026-09-12T08:47:19.496508697Z",
  "published": "2026-09-11T20:19:38.760Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-89552"
    }
  ],
  "upstream": [
    "CVE-2026-89552"
  ]
}