netfs: release readahead folios on iterator preparation failure

{
  "id": "ace599f0b2825361766e688532e50cdebe34db4722b687f55f691e7ce79fcc03",
  "url": "https://osv.dev/vulnerability/CVE-2026-80897",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "netfs: release readahead folios on iterator preparation failure",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: netfs: release readahead folios on iterator preparation failure netfs_prepare_read_iterator() batches readahead folios in put_batch so that the folio references can be dropped after the I/O iterator has been prepared. If rolling_buffer_load_from_ra() fails after earlier folios have been batched, the function returns immediately and leaves those references held. Release the batch before returning the error.",
    "evidence": "osv:CVE-2026-80897",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.44",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-80897",
      "aliases": [
        "CVE-2026-80897"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "e0186fa7436e55db10cecc2308749e2a877269a5"
                },
                {
                  "fixed": "9ef7c3c5cf771286f187aed199dac0972404cc0f"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "06fa229ceb36898e68022b5654c017d2c6582d7d"
                },
                {
                  "fixed": "2c148a31ca01fc160aceec777bbc0041b0d0b8bd"
                },
                {
                  "fixed": "935e7b74bb2368f215cf8c2ad4bff60ee4e7589e"
                },
                {
                  "fixed": "87eb3d272dcbcbbfe5c1576c10e5dc72810cf1f6"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80897.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.14.0"
                },
                {
                  "fixed": "6.18.44"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.8"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80897.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.885198095Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2c148a31ca01fc160aceec777bbc0041b0d0b8bd",
        "https://git.kernel.org/stable/c/87eb3d272dcbcbbfe5c1576c10e5dc72810cf1f6",
        "https://git.kernel.org/stable/c/935e7b74bb2368f215cf8c2ad4bff60ee4e7589e",
        "https://git.kernel.org/stable/c/9ef7c3c5cf771286f187aed199dac0972404cc0f",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80897.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-80897",
        "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/2026/80xxx/CVE-2026-80897.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-80897",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 519511,
  "published_at": "2026-09-04T17:11:12.499+00:00"
}