{"id":"DEBIAN-CVE-2024-56549","details":"In the Linux kernel, the following vulnerability has been resolved:  cachefiles: Fix NULL pointer dereference in object-\u003efile  At present, the object-\u003efile has the NULL pointer dereference problem in ondemand-mode. The root cause is that the allocated fd and object-\u003efile lifetime are inconsistent, and the user-space invocation to anon_fd uses object-\u003efile. Following is the process that triggers the issue:  \t  [write fd]\t\t\t\t[umount] cachefiles_ondemand_fd_write_iter \t\t\t\t       fscache_cookie_state_machine \t\t\t\t\t cachefiles_withdraw_cookie   if (!file) return -ENOBUFS \t\t\t\t\t   cachefiles_clean_up_object \t\t\t\t\t     cachefiles_unmark_inode_in_use \t\t\t\t\t     fput(object-\u003efile) \t\t\t\t\t     object-\u003efile = NULL   // file NULL pointer dereference!   __cachefiles_write(..., file, ...)  Fix this issue by add an additional reference count to the object-\u003efile before write/llseek, and decrement after it finished.","modified":"2026-09-15T09:02:59.878899682Z","published":"2024-12-27T14:15:34.747Z","upstream":["CVE-2024-56549"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-56549"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.129-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","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","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-56549.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.3-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-56549.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.3-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-56549.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:N/I:N/A:H"}]}