{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-41051","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-07-12T12:17:45.626Z","datePublished":"2024-07-29T14:32:07.577Z","dateUpdated":"2026-08-05T11:35:01.418Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T11:35:01.418Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: wait for ondemand_object_worker to finish when dropping object\n\nWhen queuing ondemand_object_worker() to re-open the object,\ncachefiles_object is not pinned. The cachefiles_object may be freed when\nthe pending read request is completed intentionally and the related\nerofs is umounted. If ondemand_object_worker() runs after the object is\nfreed, it will incur use-after-free problem as shown below.\n\nprocess A  processs B  process C  process D\n\ncachefiles_ondemand_send_req()\n// send a read req X\n// wait for its completion\n\n           // close ondemand fd\n           cachefiles_ondemand_fd_release()\n           // set object as CLOSE\n\n                       cachefiles_ondemand_daemon_read()\n                       // set object as REOPENING\n                       queue_work(fscache_wq, &info->ondemand_work)\n\n                                // close /dev/cachefiles\n                                cachefiles_daemon_release\n                                cachefiles_flush_reqs\n                                complete(&req->done)\n\n// read req X is completed\n// umount the erofs fs\ncachefiles_put_object()\n// object will be freed\ncachefiles_ondemand_deinit_obj_info()\nkmem_cache_free(object)\n                       // both info and object are freed\n                       ondemand_object_worker()\n\nWhen dropping an object, it is no longer necessary to reopen the object,\nso use cancel_work_sync() to cancel or wait for ondemand_object_worker()\nto finish."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The vulnerable path is driven entirely by local filesystem activity — page-cache reads on an erofs-over-fscache mount generating `CACHEFILES_OP_READ` requests, plus the local `/dev/cachefiles` daemon fd and cache-withdrawal lifecycle. No remote peer data reaches `ondemand_object_worker()`.\nAC:L - The attacker supplies the decisive side of the race by keeping a continuous flood of uncached reads in flight on the fscache-backed mount, so a request is essentially always pending on a CLOSE-state object when a drop occurs, and can also saturate `fscache_wq` to widen the window before `ondemand_object_worker()` executes; heap grooming of kmalloc-64 to reclaim the freed `cachefiles_ondemand_info` is likewise fully attacker-controlled and retryable.\nPR:L - Reaching `cachefiles_ondemand_read()` requires only an unprivileged local user with read access to an erofs-over-fscache mount — `cachefiles_prepare_read()` performs no capability check — and the attacker never needs the daemon's CAP_SYS_ADMIN, which belongs to the victim side of the race.\nUI:N - No deliberate victim action is needed; the attacker's own file reads create the pending requests, and object withdrawal is routine automated lifecycle activity (container teardown/umount, daemon restart or crash, cache unbind) rather than a user being tricked into anything.\nS:U - The corruption and all its consequences stay within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The slab-use-after-free reads `info->object` out of a reclaimed kmalloc-64 allocation and chains dereferences through `object->cookie` and `object->volume`, and `cachefiles_ondemand_init_open_req()` `memcpy()`s from those attacker-redirected pointers into a message that `cachefiles_ondemand_daemon_read()` copies to userspace — an arbitrary kernel-memory read primitive.\nI:H - The freed-object path performs attacker-addressable writes: `cachefiles_ondemand_set_object_close()` stores to `object->ondemand->state`, `wake_up_all(&cache->daemon_pollwq)` does spinlock and list manipulation on a controlled address, and `xas_store()` writes into a forged xarray — sufficient to build a write primitive and escalate privileges.\nA:H - Even without successful heap grooming, `ondemand_object_worker()` dereferences garbage from freed memory in workqueue context (and a still-queued work item leaves the workqueue list pointing into freed slab), producing the slab-use-after-free oops/panic described in the commit."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/cachefiles/ondemand.c"],"versions":[{"version":"f17443d52d805c9a7fab5e67a4e8b973626fe1cd","lessThan":"ec9289369259d982e735a71437e32e6b4035290c","status":"affected","versionType":"git"},{"version":"f740fd943bb1fbf79b7eaba3c71eb7536f437f51","lessThan":"d3179bae72b1b5e555ba839d6d9f40a350a4d78a","status":"affected","versionType":"git"},{"version":"0a7e54c1959c0feb2de23397ec09c7692364313e","lessThan":"b26525b2183632f16a3a4108fe6a4bfa8afac6ed","status":"affected","versionType":"git"},{"version":"0a7e54c1959c0feb2de23397ec09c7692364313e","lessThan":"12e009d60852f7bce0afc373ca0b320f14150418","status":"affected","versionType":"git"},{"version":"6.1.95","lessThan":"6.1.100","status":"affected","versionType":"semver"},{"version":"6.6.35","lessThan":"6.6.41","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/cachefiles/ondemand.c"],"versions":[{"version":"6.8","status":"affected"},{"version":"0","lessThan":"6.8","status":"unaffected","versionType":"semver"},{"version":"6.1.100","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.41","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.9.10","lessThanOrEqual":"6.9.*","status":"unaffected","versionType":"semver"},{"version":"6.10","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.95","versionEndExcluding":"6.1.100"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.35","versionEndExcluding":"6.6.41"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.9.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.10"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/ec9289369259d982e735a71437e32e6b4035290c"},{"url":"https://git.kernel.org/stable/c/d3179bae72b1b5e555ba839d6d9f40a350a4d78a"},{"url":"https://git.kernel.org/stable/c/b26525b2183632f16a3a4108fe6a4bfa8afac6ed"},{"url":"https://git.kernel.org/stable/c/12e009d60852f7bce0afc373ca0b320f14150418"}],"title":"cachefiles: wait for ondemand_object_worker to finish when dropping object","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/ec9289369259d982e735a71437e32e6b4035290c","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/d3179bae72b1b5e555ba839d6d9f40a350a4d78a","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/b26525b2183632f16a3a4108fe6a4bfa8afac6ed","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/12e009d60852f7bce0afc373ca0b320f14150418","tags":["x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T21:59:52.818Z"}},{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-41051","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T16:22:41.369243Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-09-11T17:33:01.915Z"}}]}}