Show plain JSON{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-39510", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-06-25T14:23:23.753Z", "datePublished": "2024-07-12T12:20:40.901Z", "dateUpdated": "2025-05-04T09:17:21.351Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T09:17:21.351Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: fix slab-use-after-free in cachefiles_ondemand_daemon_read()\n\nWe got the following issue in a fuzz test of randomly issuing the restore\ncommand:\n\n==================================================================\nBUG: KASAN: slab-use-after-free in cachefiles_ondemand_daemon_read+0xb41/0xb60\nRead of size 8 at addr ffff888122e84088 by task ondemand-04-dae/963\n\nCPU: 13 PID: 963 Comm: ondemand-04-dae Not tainted 6.8.0-dirty #564\nCall Trace:\n kasan_report+0x93/0xc0\n cachefiles_ondemand_daemon_read+0xb41/0xb60\n vfs_read+0x169/0xb50\n ksys_read+0xf5/0x1e0\n\nAllocated by task 116:\n kmem_cache_alloc+0x140/0x3a0\n cachefiles_lookup_cookie+0x140/0xcd0\n fscache_cookie_state_machine+0x43c/0x1230\n [...]\n\nFreed by task 792:\n kmem_cache_free+0xfe/0x390\n cachefiles_put_object+0x241/0x480\n fscache_cookie_state_machine+0x5c8/0x1230\n [...]\n==================================================================\n\nFollowing is the process that triggers the issue:\n\n mount | daemon_thread1 | daemon_thread2\n------------------------------------------------------------\ncachefiles_withdraw_cookie\n cachefiles_ondemand_clean_object(object)\n cachefiles_ondemand_send_req\n REQ_A = kzalloc(sizeof(*req) + data_len)\n wait_for_completion(&REQ_A->done)\n\n cachefiles_daemon_read\n cachefiles_ondemand_daemon_read\n REQ_A = cachefiles_ondemand_select_req\n msg->object_id = req->object->ondemand->ondemand_id\n ------ restore ------\n cachefiles_ondemand_restore\n xas_for_each(&xas, req, ULONG_MAX)\n xas_set_mark(&xas, CACHEFILES_REQ_NEW)\n\n cachefiles_daemon_read\n cachefiles_ondemand_daemon_read\n REQ_A = cachefiles_ondemand_select_req\n copy_to_user(_buffer, msg, n)\n xa_erase(&cache->reqs, id)\n complete(&REQ_A->done)\n ------ close(fd) ------\n cachefiles_ondemand_fd_release\n cachefiles_put_object\n cachefiles_put_object\n kmem_cache_free(cachefiles_object_jar, object)\n REQ_A->object->ondemand->ondemand_id\n // object UAF !!!\n\nWhen we see the request within xa_lock, req->object must not have been\nfreed yet, so grab the reference count of object before xa_unlock to\navoid the above issue."}], "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", "include/trace/events/cachefiles.h"], "versions": [{"version": "f17443d52d805c9a7fab5e67a4e8b973626fe1cd", "lessThan": "cb55625f8eb9d2de8be4da0c4580d48cbb32058e", "status": "affected", "versionType": "git"}, {"version": "f740fd943bb1fbf79b7eaba3c71eb7536f437f51", "lessThan": "3958679c49152391209b32be3357193300a51abd", "status": "affected", "versionType": "git"}, {"version": "0a7e54c1959c0feb2de23397ec09c7692364313e", "lessThan": "93064676a2820420a2d37d7c8289f277fe20793d", "status": "affected", "versionType": "git"}, {"version": "0a7e54c1959c0feb2de23397ec09c7692364313e", "lessThan": "da4a827416066191aafeeccee50a8836a826ba10", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/cachefiles/ondemand.c", "include/trace/events/cachefiles.h"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.9.6", "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": "6.8", "versionEndExcluding": "6.9.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.10"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/cb55625f8eb9d2de8be4da0c4580d48cbb32058e"}, {"url": "https://git.kernel.org/stable/c/3958679c49152391209b32be3357193300a51abd"}, {"url": "https://git.kernel.org/stable/c/93064676a2820420a2d37d7c8289f277fe20793d"}, {"url": "https://git.kernel.org/stable/c/da4a827416066191aafeeccee50a8836a826ba10"}], "title": "cachefiles: fix slab-use-after-free in cachefiles_ondemand_daemon_read()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T04:26:15.474Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/cb55625f8eb9d2de8be4da0c4580d48cbb32058e", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/3958679c49152391209b32be3357193300a51abd", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/93064676a2820420a2d37d7c8289f277fe20793d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/da4a827416066191aafeeccee50a8836a826ba10", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-39510", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T17:06:40.868593Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:38.916Z"}}]}}