{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "563d5ca93e883b9dcb4b7dc8967ac569fd91820d"
            },
            {
              "fixed": "21e235a36cfb6d145cefb10728f12f5dc5412f54"
            },
            {
              "fixed": "836ee1b0426ea3db31531e9581cc32f513d24e32"
            },
            {
              "fixed": "70c2a89a3bc207c3bfbf6f21bb439809e0a4a27a"
            },
            {
              "fixed": "83317cce60a032c49480dcdabe146435bd689d03"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.12.0"
            },
            {
              "fixed": "6.12.83"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.24"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43090.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: fix refcount leak in xfrm_migrate_policy_find\n\nsyzkaller reported a memory leak in xfrm_policy_alloc:\n\n  BUG: memory leak\n  unreferenced object 0xffff888114d79000 (size 1024):\n    comm \"syz.1.17\", pid 931\n    ...\n    xfrm_policy_alloc+0xb3/0x4b0 net/xfrm/xfrm_policy.c:432\n\nThe root cause is a double call to xfrm_pol_hold_rcu() in\nxfrm_migrate_policy_find(). The lookup function already returns\na policy with held reference, making the second call redundant.\n\nRemove the redundant xfrm_pol_hold_rcu() call to fix the refcount\nimbalance and prevent the memory leak.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.",
  "id": "CVE-2026-43090",
  "modified": "2026-07-08T05:36:58.942635574Z",
  "published": "2026-05-06T07:40:23.286Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21e235a36cfb6d145cefb10728f12f5dc5412f54"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/70c2a89a3bc207c3bfbf6f21bb439809e0a4a27a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/83317cce60a032c49480dcdabe146435bd689d03"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/836ee1b0426ea3db31531e9581cc32f513d24e32"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43090.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43090"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "xfrm: fix refcount leak in xfrm_migrate_policy_find"
}