{"id":"CVE-2021-47598","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsch_cake: do not call cake_destroy() from cake_init()\n\nqdiscs are not supposed to call their own destroy() method\nfrom init(), because core stack already does that.\n\nsyzbot was able to trigger use after free:\n\nDEBUG_LOCKS_WARN_ON(lock-\u003emagic != lock)\nWARNING: CPU: 0 PID: 21902 at kernel/locking/mutex.c:586 __mutex_lock_common kernel/locking/mutex.c:586 [inline]\nWARNING: CPU: 0 PID: 21902 at kernel/locking/mutex.c:586 __mutex_lock+0x9ec/0x12f0 kernel/locking/mutex.c:740\nModules linked in:\nCPU: 0 PID: 21902 Comm: syz-executor189 Not tainted 5.16.0-rc4-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nRIP: 0010:__mutex_lock_common kernel/locking/mutex.c:586 [inline]\nRIP: 0010:__mutex_lock+0x9ec/0x12f0 kernel/locking/mutex.c:740\nCode: 08 84 d2 0f 85 19 08 00 00 8b 05 97 38 4b 04 85 c0 0f 85 27 f7 ff ff 48 c7 c6 20 00 ac 89 48 c7 c7 a0 fe ab 89 e8 bf 76 ba ff \u003c0f\u003e 0b e9 0d f7 ff ff 48 8b 44 24 40 48 8d b8 c8 08 00 00 48 89 f8\nRSP: 0018:ffffc9000627f290 EFLAGS: 00010282\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000\nRDX: ffff88802315d700 RSI: ffffffff815f1db8 RDI: fffff52000c4fe44\nRBP: ffff88818f28e000 R08: 0000000000000000 R09: 0000000000000000\nR10: ffffffff815ebb5e R11: 0000000000000000 R12: 0000000000000000\nR13: dffffc0000000000 R14: ffffc9000627f458 R15: 0000000093c30000\nFS:  0000555556abc400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007fda689c3303 CR3: 000000001cfbb000 CR4: 0000000000350ef0\nCall Trace:\n \u003cTASK\u003e\n tcf_chain0_head_change_cb_del+0x2e/0x3d0 net/sched/cls_api.c:810\n tcf_block_put_ext net/sched/cls_api.c:1381 [inline]\n tcf_block_put_ext net/sched/cls_api.c:1376 [inline]\n tcf_block_put+0xbc/0x130 net/sched/cls_api.c:1394\n cake_destroy+0x3f/0x80 net/sched/sch_cake.c:2695\n qdisc_create.constprop.0+0x9da/0x10f0 net/sched/sch_api.c:1293\n tc_modify_qdisc+0x4c5/0x1980 net/sched/sch_api.c:1660\n rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5571\n netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2496\n netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]\n netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1345\n netlink_sendmsg+0x904/0xdf0 net/netlink/af_netlink.c:1921\n sock_sendmsg_nosec net/socket.c:704 [inline]\n sock_sendmsg+0xcf/0x120 net/socket.c:724\n ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409\n ___sys_sendmsg+0xf3/0x170 net/socket.c:2463\n __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\nRIP: 0033:0x7f1bb06badb9\nCode: Unable to access opcode bytes at RIP 0x7f1bb06bad8f.\nRSP: 002b:00007fff3012a658 EFLAGS: 00000246 ORIG_RAX: 000000000000002e\nRAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f1bb06badb9\nRDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000003\nRBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000003\nR10: 0000000000000003 R11: 0000000000000246 R12: 00007fff3012a688\nR13: 00007fff3012a6a0 R14: 00007fff3012a6e0 R15: 00000000000013c2\n \u003c/TASK\u003e","modified":"2026-03-13T05:19:28.125977Z","published":"2024-06-19T15:15:54.383Z","related":["SUSE-SU-2024:2893-1","SUSE-SU-2024:2894-1","SUSE-SU-2024:2902-1","SUSE-SU-2024:2923-1","SUSE-SU-2024:2929-1","SUSE-SU-2024:2939-1","SUSE-SU-2024:2947-1","SUSE-SU-2024:2948-1","SUSE-SU-2024:3767-1","SUSE-SU-2024:3768-1","SUSE-SU-2024:3774-1","SUSE-SU-2024:3777-1","SUSE-SU-2024:3779-1","SUSE-SU-2024:3780-1","SUSE-SU-2024:3782-1","SUSE-SU-2024:3783-1","SUSE-SU-2024:3793-1","SUSE-SU-2024:3794-1","SUSE-SU-2024:3796-1","SUSE-SU-2024:3797-1","SUSE-SU-2024:3798-1","SUSE-SU-2024:3799-1","SUSE-SU-2024:3800-1","SUSE-SU-2024:3803-1","SUSE-SU-2024:3804-1","SUSE-SU-2024:3805-1","SUSE-SU-2024:3806-1","SUSE-SU-2024:3814-1","SUSE-SU-2024:3815-1","SUSE-SU-2024:3824-1","SUSE-SU-2024:3829-1","SUSE-SU-2024:3830-1","SUSE-SU-2024:3831-1","SUSE-SU-2024:3833-1","SUSE-SU-2024:3836-1","SUSE-SU-2024:3837-1","SUSE-SU-2024:3838-1","SUSE-SU-2024:3840-1","SUSE-SU-2024:3842-1","SUSE-SU-2024:3848-1","SUSE-SU-2024:3849-1","SUSE-SU-2024:3850-1","SUSE-SU-2024:3851-1","SUSE-SU-2024:3852-1","SUSE-SU-2024:3854-1","SUSE-SU-2024:3855-1","SUSE-SU-2024:3856-1","SUSE-SU-2024:3857-1","SUSE-SU-2024:3859-1","SUSE-SU-2024:3860-1","SUSE-SU-2024:4122-1","SUSE-SU-2024:4123-1","SUSE-SU-2024:4124-1","SUSE-SU-2024:4125-1","SUSE-SU-2024:4127-1","SUSE-SU-2024:4128-1","SUSE-SU-2024:4161-1","SUSE-SU-2024:4180-1","SUSE-SU-2024:4207-1","SUSE-SU-2024:4214-1","SUSE-SU-2024:4216-1","SUSE-SU-2024:4218-1","SUSE-SU-2024:4228-1","SUSE-SU-2024:4231-1","SUSE-SU-2024:4234-1","SUSE-SU-2024:4235-1","SUSE-SU-2024:4236-1","SUSE-SU-2024:4242-1","SUSE-SU-2024:4243-1","SUSE-SU-2024:4246-1","SUSE-SU-2024:4248-1","SUSE-SU-2024:4250-1","SUSE-SU-2024:4256-1","SUSE-SU-2024:4262-1","SUSE-SU-2024:4263-1","SUSE-SU-2024:4264-1","SUSE-SU-2024:4266-1","SUSE-SU-2024:4275-1","SUSE-SU-2025:0101-1","SUSE-SU-2025:0105-1","SUSE-SU-2025:0106-1","SUSE-SU-2025:0107-1","SUSE-SU-2025:0109-1","SUSE-SU-2025:0110-1","SUSE-SU-2025:0111-1","SUSE-SU-2025:0114-1","SUSE-SU-2025:0115-1","SUSE-SU-2025:0124-1","SUSE-SU-2025:0131-1","SUSE-SU-2025:0137-1","SUSE-SU-2025:0138-1","SUSE-SU-2025:0146-1","SUSE-SU-2025:0150-1","SUSE-SU-2025:0158-1","SUSE-SU-2025:0164-1","SUSE-SU-2025:0238-1","SUSE-SU-2025:0239-1","SUSE-SU-2025:0240-1","SUSE-SU-2025:0243-1","SUSE-SU-2025:0244-1","SUSE-SU-2025:0248-1","SUSE-SU-2025:0249-1","SUSE-SU-2025:0251-1","SUSE-SU-2025:0252-1","SUSE-SU-2025:0253-1","SUSE-SU-2025:0254-1","SUSE-SU-2025:0260-1","SUSE-SU-2025:0261-1","SUSE-SU-2025:0264-1","SUSE-SU-2025:0266-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/4e388232e630ebe4f94b4a0715ec98c0e2b314a3"},{"type":"FIX","url":"https://git.kernel.org/stable/c/ab443c53916730862cec202078d36fd4008bea79"},{"type":"FIX","url":"https://git.kernel.org/stable/c/f6deae2e2d83bd267e1986f5d71d8c458e18fd99"},{"type":"FIX","url":"https://git.kernel.org/stable/c/0d80462fbdcafd536dcad7569e65d3d14a7e9f2f"},{"type":"FIX","url":"https://git.kernel.org/stable/c/20ad1ef02f9ad5e1dda9eeb113e4c158b4806986"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"4.19"},{"fixed":"4.19.222"}]},{"events":[{"introduced":"4.20"},{"fixed":"5.4.168"}]},{"events":[{"introduced":"5.5"},{"fixed":"5.10.88"}]},{"events":[{"introduced":"5.11"},{"fixed":"5.15.11"}]}],"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47598.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}