{"id":"DEBIAN-CVE-2024-40900","details":"In the Linux kernel, the following vulnerability has been resolved:  cachefiles: remove requests from xarray during flushing requests  Even with CACHEFILES_DEAD set, we can still read the requests, so in the following concurrency the request may be used after it has been freed:       mount  |   daemon_thread1    |    daemon_thread2 ------------------------------------------------------------  cachefiles_ondemand_init_object   cachefiles_ondemand_send_req    REQ_A = kzalloc(sizeof(*req) + data_len)    wait_for_completion(&REQ_A-\u003edone)             cachefiles_daemon_read              cachefiles_ondemand_daemon_read                                   // close dev fd                                   cachefiles_flush_reqs                                    complete(&REQ_A-\u003edone)    kfree(REQ_A)               xa_lock(&cache-\u003ereqs);               cachefiles_ondemand_select_req                 req-\u003emsg.opcode != CACHEFILES_OP_READ                 // req use-after-free !!!               xa_unlock(&cache-\u003ereqs);                                    xa_destroy(&cache-\u003ereqs)  Hence remove requests from cache-\u003ereqs when flushing them to avoid accessing freed requests.","modified":"2026-09-15T09:03:09.433682016Z","published":"2024-07-12T13:15:13.433Z","upstream":["CVE-2024-40900"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-40900"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.99-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-40900.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.9.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-40900.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.9.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-40900.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}