{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "c07dc84ed67c5a182273171639bacbbb87c12175"
            },
            {
              "fixed": "4584229395d0d65bd517780afe97ffea07cb2c3d"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "8072e34e1387d03102b788677d491e2bcceef6f5"
            },
            {
              "fixed": "b81572b073441dfd32213e41857676d0dbff4665"
            },
            {
              "fixed": "b48f44f36e6607b2f818560f19deb86b4a9c717b"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.18.4"
            },
            {
              "fixed": "6.18.33"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.18.33"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53026.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg\n\nIn nfsd4_add_rdaccess_to_wrdeleg, if fp-\u003efi_fds[O_RDONLY] is already\nset by another thread, __nfs4_file_get_access should not be called\nto increment the nfs4_file access count since that was already done\nby the thread that added READ access to the file. The extra fi_access\ncount in nfs4_file can prevent the corresponding nfsd_file from being\nfreed.\n\nWhen stopping nfs-server service, these extra access counts trigger a\nBUG in kmem_cache_destroy() that shows nfsd_file object remaining on\n__kmem_cache_shutdown.\n\nThis problem can be reproduced by running the Git project's test\nsuite over NFS.",
  "id": "CVE-2026-53026",
  "modified": "2026-07-15T01:49:10.225981111Z",
  "published": "2026-06-24T16:29:34.855Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4584229395d0d65bd517780afe97ffea07cb2c3d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b48f44f36e6607b2f818560f19deb86b4a9c717b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b81572b073441dfd32213e41857676d0dbff4665"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53026.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53026"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg"
}