cachefiles: flush all requests after setting CACHEFILES_DEAD

{
  "id": "83a8a11ebc99f0f0cef6dce179d23f708f192e1b480749fb55d0b2f6c240beb1",
  "url": "https://osv.dev/vulnerability/CVE-2024-40935",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "cachefiles: flush all requests after setting CACHEFILES_DEAD",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: cachefiles: flush all requests after setting CACHEFILES_DEAD In ondemand mode, when the daemon is processing an open request, if the kernel flags the cache as CACHEFILES_DEAD, the cachefiles_daemon_write() will always return -EIO, so the daemon can't pass the copen to the kernel. Then the kernel process that is waiting for the copen triggers a hung_task. Since the DEAD state is irreversible, it can only be exited by closing /dev/cachefiles. Therefore, after calling cachefiles_io_error() to mark the cache as CACHEFILES_DEAD, if in ondemand mode, flush all requests to avoid the above hungtask. We may still be able to read some of the cached data before closing the fd of /dev/cachefiles. Note that this relies on the patch that adds reference counting to the req, otherwise it may UAF.",
    "evidence": "osv:CVE-2024-40935",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.95",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.35",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.9.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-40935",
      "aliases": [
        "CVE-2024-40935"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c8383054506c77b814489c09877b5db83fd4abf2"
                },
                {
                  "fixed": "320ba9cbca78be79c912143bbba1d1b35ca55cf0"
                },
                {
                  "fixed": "3bf0b8030296e9ee60d3d4c15849ad9ac0b47081"
                },
                {
                  "fixed": "e73fac95084839c5178d97e81c6a2051251bdc00"
                },
                {
                  "fixed": "85e833cd7243bda7285492b0653c3abb1e2e757b"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-40935.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.19.0"
                },
                {
                  "fixed": "6.1.95"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.35"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.9.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-40935.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.400622185Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/320ba9cbca78be79c912143bbba1d1b35ca55cf0",
        "https://git.kernel.org/stable/c/3bf0b8030296e9ee60d3d4c15849ad9ac0b47081",
        "https://git.kernel.org/stable/c/85e833cd7243bda7285492b0653c3abb1e2e757b",
        "https://git.kernel.org/stable/c/e73fac95084839c5178d97e81c6a2051251bdc00",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/40xxx/CVE-2024-40935.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-40935",
        "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/2024/40xxx/CVE-2024-40935.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-40935",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 496039,
  "published_at": "2024-07-12T12:25:12.483+00:00"
}