HighFix available

cachefiles: wait for ondemand_object_worker to finish when dropping object

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: cachefiles: wait for ondemand_object_worker to finish when dropping object When queuing ondemand_object_worker() to re-open the object, cachefiles_object is not pinned. The cachefiles_object may be freed when the pending read request is completed intentionally and the related erofs is umounted. If ondemand_object_worker() runs after the object is freed, it will incur use-after-free problem as shown below. process A processs B process C process D cachefiles_ondemand_send_req() // send a read req X // wait for its completion // close ondemand fd cachefiles_ondemand_fd_release() // set object as CLOSE cachefiles_ondemand_daemon_read() // set object as REOPENING queue_work(fscache_wq, &info->ondemand_work) // close /dev/cachefiles cachefiles_daemon_release cachefiles_flush_reqs complete(&req->done) // read req X is completed // umount the erofs fs cachefiles_put_object() // object will be freed cachefiles_ondemand_deinit_obj_info() kmem_cache_free(object) // both info and object are freed ondemand_object_worker() When dropping an object, it is no longer necessary to reopen the object, so use cancel_work_sync() to cancel or wait for ondemand_object_worker() to finish.

Products: Kernel
Affected versions: Not specified
Fixed versions: 6.1.100, 6.6.41, 6.9.10
CVEs: CVE-2024-41051
Confirmed fixed CVEs: Not specified
Updated in this feed: 7 Nov 2026, 08:02 UTC · Revision 1

Source evidence

cachefiles: wait for ondemand_object_worker to finish when dropping object

core-osv · Original source

Published 29 Jul 2024, 14:32 UTC

osv:CVE-2024-41051

Kernel

Fixed versions: 6.1.100, 6.6.41, 6.9.10

Complete source record

{
  "id": "f64ca2bbf44fc1212e2bc5766d3366e58be95abc59a485d2730cd9765bf5787d",
  "url": "https://osv.dev/vulnerability/CVE-2024-41051",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "cachefiles: wait for ondemand_object_worker to finish when dropping object",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: cachefiles: wait for ondemand_object_worker to finish when dropping object When queuing ondemand_object_worker() to re-open the object, cachefiles_object is not pinned. The cachefiles_object may be freed when the pending read request is completed intentionally and the related erofs is umounted. If ondemand_object_worker() runs after the object is freed, it will incur use-after-free problem as shown below. process A processs B process C process D cachefiles_ondemand_send_req() // send a read req X // wait for its completion // close ondemand fd cachefiles_ondemand_fd_release() // set object as CLOSE cachefiles_ondemand_daemon_read() // set object as REOPENING queue_work(fscache_wq, &info->ondemand_work) // close /dev/cachefiles cachefiles_daemon_release cachefiles_flush_reqs complete(&req->done) // read req X is completed // umount the erofs fs cachefiles_put_object() // object will be freed cachefiles_ondemand_deinit_obj_info() kmem_cache_free(object) // both info and object are freed ondemand_object_worker() When dropping an object, it is no longer necessary to reopen the object, so use cancel_work_sync() to cancel or wait for ondemand_object_worker() to finish.",
    "evidence": "osv:CVE-2024-41051",
    "products": [
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    "severity": "high",
    "structured": {
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      "aliases": [
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      "metrics": [
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          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
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      ],
      "modified": "2026-10-28T02:30:50.413513978Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/12e009d60852f7bce0afc373ca0b320f14150418",
        "https://git.kernel.org/stable/c/b26525b2183632f16a3a4108fe6a4bfa8afac6ed",
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        "https://git.kernel.org/stable/c/ec9289369259d982e735a71437e32e6b4035290c",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/41xxx/CVE-2024-41051.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-41051",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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      "provider_metadata": {
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  "source_id": "core-osv",
  "document_id": 518694,
  "published_at": "2024-07-29T14:32:07.577+00:00"
}