{"dataType":"CVE_RECORD","dataVersion":"5.2","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":"2025-11-03T21:56:30.908Z"},"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":[{"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"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T21:56:30.908Z"}},{"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"}}]}}