{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "eae9e78951bb02a7b94a9adef6e981413d13c564"
            },
            {
              "fixed": "9d6b0f6d437e2f8350e08678e5e1d20c11c364f3"
            },
            {
              "fixed": "81e985b4c3a6cbcc443fcdcd3ebda7fcc845d459"
            }
          ],
          "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": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72377.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: Remove setting of AS_RELEASE_ALWAYS for symlinks and mountpoints\n\nRegular AFS files correctly use afs_file_aops which have release_folio\nset as netfs_release_folio, so AS_RELEASE_ALWAYS is valid for them\nwhen fscache is enabled (set via afs_vnode_set_cache()).\nSymlinks and mountpoints in AFS use afs_dir_aops, which does not provide\na release_folio callback. However, afs_apply_status() unconditionally\ncalls mapping_set_release_always() for these.\n\nIn such case when memory management code attempts to release folios,\nfilemap_release_folio() checks folio_needs_release() which\nreturns true due to AS_RELEASE_ALWAYS being set. Since there is no\nrelease_folio callback, it falls through to try_to_free_buffers(),\nwhich at present expects buffer_heads to be not null. For symlinks\nand mountpoints without buffer_heads, this causes pointer dereference.\n\n[dh: Added more bits that were missed]",
  "id": "CVE-2026-72377",
  "modified": "2026-08-18T03:31:14.473400063Z",
  "published": "2026-08-15T05:56:11.017Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/81e985b4c3a6cbcc443fcdcd3ebda7fcc845d459"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d6b0f6d437e2f8350e08678e5e1d20c11c364f3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72377.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72377"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "afs: Remove setting of AS_RELEASE_ALWAYS for symlinks and mountpoints"
}