CVE-2024-41051 (GCVE-0-2024-41051)
Vulnerability from cvelistv5
Published
2024-07-29 14:32
Modified
2026-08-05 11:35
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: f17443d52d805c9a7fab5e67a4e8b973626fe1cd
Version: f740fd943bb1fbf79b7eaba3c71eb7536f437f51
Version: 0a7e54c1959c0feb2de23397ec09c7692364313e
Version: 0a7e54c1959c0feb2de23397ec09c7692364313e
Version: 6.1.95   ≤
Version: 6.6.35   ≤
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