{"id":"DEBIAN-CVE-2022-49802","details":"In the Linux kernel, the following vulnerability has been resolved:  ftrace: Fix null pointer dereference in ftrace_add_mod()  The @ftrace_mod is allocated by kzalloc(), so both the members {prev,next} of @ftrace_mode-\u003elist are NULL, it's not a valid state to call list_del(). If kstrdup() for @ftrace_mod-\u003e{func|module} fails, it goes to @out_free tag and calls free_ftrace_mod() to destroy @ftrace_mod, then list_del() will write prev-\u003enext and next-\u003eprev, where null pointer dereference happens.  BUG: kernel NULL pointer dereference, address: 0000000000000008 Oops: 0002 [#1] PREEMPT SMP NOPTI Call Trace:  \u003cTASK\u003e  ftrace_mod_callback+0x20d/0x220  ? do_filp_open+0xd9/0x140  ftrace_process_regex.isra.51+0xbf/0x130  ftrace_regex_write.isra.52.part.53+0x6e/0x90  vfs_write+0xee/0x3a0  ? __audit_filter_op+0xb1/0x100  ? auditd_test_task+0x38/0x50  ksys_write+0xa5/0xe0  do_syscall_64+0x3a/0x90  entry_SYSCALL_64_after_hwframe+0x63/0xcd Kernel panic - not syncing: Fatal exception  So call INIT_LIST_HEAD() to initialize the list member to fix this issue.","modified":"2026-09-01T16:05:33.652796343Z","published":"2025-05-01T15:16:03.510Z","upstream":["CVE-2022-49802"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-49802"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.10-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49802.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.10-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49802.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.10-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49802.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"}]}