{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "6dd80936618c4ff852d4db73aca400351d9bd9f0"
            },
            {
              "fixed": "77bb293049d61e04c12b24ebbffafaf5ab36af90"
            },
            {
              "fixed": "f91e10435c0dd37c48b1b25e6236284f656ddc0c"
            },
            {
              "fixed": "9871938f99cc6cb266a77265491660e2375271f5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.14.0"
            },
            {
              "fixed": "6.18.34"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64156.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs, afs: Fix write skipping in dir/link writepages\n\nFix netfs_write_single() and afs_single_writepages() to better handle a\nwrite that would be skipped due to lock contention and WB_SYNC_NONE by\nreturning 1 from netfs_write_single() if it skipped and making\nafs_single_writepages() skip also.  If a skip occurs, the inode must be\nre-marked as the VFS may have cleared the mark.\n\nThis is really only theoretical for directories in netfs_write_single() as\nthe only path to that is through afs_single_writepages() that takes the\n-\u003evalidate_lock around it, thereby serialising it.",
  "id": "CVE-2026-64156",
  "modified": "2026-08-12T03:51:11.095382133Z",
  "published": "2026-07-19T15:40:44.277Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77bb293049d61e04c12b24ebbffafaf5ab36af90"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9871938f99cc6cb266a77265491660e2375271f5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f91e10435c0dd37c48b1b25e6236284f656ddc0c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64156.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64156"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "netfs, afs: Fix write skipping in dir/link writepages"
}