{"id":"DEBIAN-CVE-2022-49087","details":"In the Linux kernel, the following vulnerability has been resolved:  rxrpc: fix a race in rxrpc_exit_net()  Current code can lead to the following race:  CPU0                                                 CPU1  rxrpc_exit_net()                                                      rxrpc_peer_keepalive_worker()                                                        if (rxnet-\u003elive)    rxnet-\u003elive = false;   del_timer_sync(&rxnet-\u003epeer_keepalive_timer);                                                               timer_reduce(&rxnet-\u003epeer_keepalive_timer, jiffies + delay);    cancel_work_sync(&rxnet-\u003epeer_keepalive_work);  rxrpc_exit_net() exits while peer_keepalive_timer is still armed, leading to use-after-free.  syzbot report was:  ODEBUG: free active (active state 0) object type: timer_list hint: rxrpc_peer_keepalive_timeout+0x0/0xb0 WARNING: CPU: 0 PID: 3660 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505 Modules linked in: CPU: 0 PID: 3660 Comm: kworker/u4:6 Not tainted 5.17.0-syzkaller-13993-g88e6c0207623 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:debug_print_object+0x16e/0x250 lib/debugobjects.c:505 Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 af 00 00 00 48 8b 14 dd 00 1c 26 8a 4c 89 ee 48 c7 c7 00 10 26 8a e8 b1 e7 28 05 \u003c0f\u003e 0b 83 05 15 eb c5 09 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffffc9000353fb00 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: ffff888029196140 RSI: ffffffff815efad8 RDI: fffff520006a7f52 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815ea4ae R11: 0000000000000000 R12: ffffffff89ce23e0 R13: ffffffff8a2614e0 R14: ffffffff816628c0 R15: dffffc0000000000 FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe1f2908924 CR3: 0000000043720000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace:  \u003cTASK\u003e  __debug_check_no_obj_freed lib/debugobjects.c:992 [inline]  debug_check_no_obj_freed+0x301/0x420 lib/debugobjects.c:1023  kfree+0xd6/0x310 mm/slab.c:3809  ops_free_list.part.0+0x119/0x370 net/core/net_namespace.c:176  ops_free_list net/core/net_namespace.c:174 [inline]  cleanup_net+0x591/0xb00 net/core/net_namespace.c:598  process_one_work+0x996/0x1610 kernel/workqueue.c:2289  worker_thread+0x665/0x1080 kernel/workqueue.c:2436  kthread+0x2e9/0x3a0 kernel/kthread.c:376  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298  \u003c/TASK\u003e","modified":"2026-09-01T16:05:20.442814601Z","published":"2025-02-26T07:00:46.043Z","upstream":["CVE-2022-49087"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-49087"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.17.3-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49087.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.17.3-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49087.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.17.3-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49087.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"}]}