{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0c991ebc8c69d29b7fc44db17075c5aa5253e2ab"
            },
            {
              "fixed": "a033c950f6731be88a7da98604ed78f302f15b80"
            },
            {
              "fixed": "1ab3da12061d7ccb099f7e925fa2d865967a316a"
            },
            {
              "fixed": "12feca126831556dc7fabe5a3ba28fbd328768b6"
            },
            {
              "fixed": "3f562c537e9ecf4bc5e206cfffc2cc047f1b7e94"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90250.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, cgroup: Fix storage null-ptr-deref after replacing prog\n\nSyzkaller reported a storage null-ptr-deref issue after replacing prog.\nThis occurs in the following scenario:\n1. prog A, an empty prog, is attached to a cgrp.\n2. prog B uses BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE and calls the\n   bpf_get_local_storage helper.\n3. link_update is called to replace prog A with prog B.\n\nThe reason is that __cgroup_bpf_replace fails to alloc and assign the\nrequired cgrp storage for the incoming replacement prog. Consequently,\nthe new prog inherits an uninit storage, leading to null-ptr-deref panic\nwhen kick the new prog.\n\nFix this by rejecting a link update if new_prog's cgroup storage is\nincompatible with link-\u003eprog.",
  "id": "CVE-2026-90250",
  "modified": "2026-09-19T03:30:41.619017434Z",
  "published": "2026-09-17T16:07:51.403Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/12feca126831556dc7fabe5a3ba28fbd328768b6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ab3da12061d7ccb099f7e925fa2d865967a316a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3f562c537e9ecf4bc5e206cfffc2cc047f1b7e94"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a033c950f6731be88a7da98604ed78f302f15b80"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90250.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90250"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "bpf, cgroup: Fix storage null-ptr-deref after replacing prog"
}