fs: init flags_valid before calling vfs_fileattr_get

{
  "id": "446b286598eb8c244777fa6379d917a2c06823e539ae43adec0ab5da163ed1f6",
  "url": "https://osv.dev/vulnerability/CVE-2026-43474",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "fs: init flags_valid before calling vfs_fileattr_get",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: fs: init flags_valid before calling vfs_fileattr_get syzbot reported a uninit-value bug in [1]. Similar to the \"*get\" context where the kernel's internal file_kattr structure is initialized before calling vfs_fileattr_get(), we should use the same mechanism when using fa. [1] BUG: KMSAN: uninit-value in fuse_fileattr_get+0xeb4/0x1450 fs/fuse/ioctl.c:517 fuse_fileattr_get+0xeb4/0x1450 fs/fuse/ioctl.c:517 vfs_fileattr_get fs/file_attr.c:94 [inline] __do_sys_file_getattr fs/file_attr.c:416 [inline] Local variable fa.i created at: __do_sys_file_getattr fs/file_attr.c:380 [inline] __se_sys_file_getattr+0x8c/0xbd0 fs/file_attr.c:372",
    "evidence": "osv:CVE-2026-43474",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.19",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-43474",
      "aliases": [
        "CVE-2026-43474"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "be7efb2d20d67f334a7de2aef77ae6c69367e646"
                },
                {
                  "fixed": "379e19e820dd1c6145426b97467728b3b89c0b42"
                },
                {
                  "fixed": "b8c182b2c8c44c6016b11d8af61715ad7ef958a1"
                },
                {
                  "fixed": "cb184dd19154fc486fa3d9e02afe70a97e54e055"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43474.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.17.0"
                },
                {
                  "fixed": "6.18.19"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "6.19.9"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43474.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:45.778978154Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/379e19e820dd1c6145426b97467728b3b89c0b42",
        "https://git.kernel.org/stable/c/b8c182b2c8c44c6016b11d8af61715ad7ef958a1",
        "https://git.kernel.org/stable/c/cb184dd19154fc486fa3d9e02afe70a97e54e055",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43474.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-43474",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43474.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-43474",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 513542,
  "published_at": "2026-05-08T14:22:32.871+00:00"
}