{"id":"CVE-2024-38589","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetrom: fix possible dead-lock in nr_rt_ioctl()\n\nsyzbot loves netrom, and found a possible deadlock in nr_rt_ioctl [1]\n\nMake sure we always acquire nr_node_list_lock be…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetrom: fix possible dead-lock in nr_rt_ioctl()\n\nsyzbot loves netrom, and found a possible deadlock in nr_rt_ioctl [1]\n\nMake sure we always acquire nr_node_list_lock be…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-667"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 2.6.12, < 4.19.316","linux_kernel >= 4.20, < 5.4.278","linux_kernel >= 5.5, < 5.10.219","linux_kernel >= 5.11, < 5.15.161","linux_kernel >= 5.16, < 6.1.93","linux_kernel >= 6.2, < 6.6.33","linux_kernel >= 6.7, < 6.8.12","linux_kernel >= 6.9, < 6.9.3"],"patched":["linux_kernel 6.9.3"],"published":"2024-06-19","updated":"2026-10-15","sourceUpdated":"2026-10-15T01:18:30.393","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-38589","references":[{"url":"https://git.kernel.org/stable/c/1fbfb483c1a290dce3f41f52d45cc46dd88b7691","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3db2fc45d1d2a6457f06ebdfd45b9820e5b5c2b7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/421c50fa81836775bf0fd6ce0e57a6eb27af24d5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5bc50a705cfac8f64ce51c95611c3dd0554ef9c3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5fb7e2a4335fc67d6952ad2a6613c46e0b05f7c5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b117e5b4f27c2c9076561b6be450a9619f0b79de","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b9d663fbf74290cb68fbc66ae4367bd56837ad1d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e03e7f20ebf7e1611d40d1fdc1bde900fd3335f6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f28bdc2ee5d9300cc77bd3d97b5b3cdd14960fd8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1fbfb483c1a290dce3f41f52d45cc46dd88b7691","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/3db2fc45d1d2a6457f06ebdfd45b9820e5b5c2b7","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/421c50fa81836775bf0fd6ce0e57a6eb27af24d5","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/5bc50a705cfac8f64ce51c95611c3dd0554ef9c3","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/5fb7e2a4335fc67d6952ad2a6613c46e0b05f7c5","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/b117e5b4f27c2c9076561b6be450a9619f0b79de","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/b9d663fbf74290cb68fbc66ae4367bd56837ad1d","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/e03e7f20ebf7e1611d40d1fdc1bde900fd3335f6","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/f28bdc2ee5d9300cc77bd3d97b5b3cdd14960fd8","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-613116.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00195,"epssPercentile":0.09069,"ingestedAt":"2026-10-15T03:30:12.708Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2024-09-10T17:13:46.964501Z"},"slug":"CVE-2024-38589","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetrom: fix possible dead-lock in nr_rt_ioctl()\n\nsyzbot loves netrom, and found a possible deadlock in nr_rt_ioctl [1]\n\nMake sure we always acquire nr_node_list_lock before nr_node_lock(nr_node)\n\n[1]\nWARNING: possible circular locking dependency detected\n6.9.0-rc7-syzkaller-02147-g654de42f3fc6 #0 Not tainted\n------------------------------------------------------\nsyz-executor350/5129 is trying to acquire lock:\n ffff8880186e2070 (&nr_node->node_lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]\n ffff8880186e2070 (&nr_node->node_lock){+...}-{2:2}, at: nr_node_lock include/net/netrom.h:152 [inline]\n ffff8880186e2070 (&nr_node->node_lock){+...}-{2:2}, at: nr_dec_obs net/netrom/nr_route.c:464 [inline]\n ffff8880186e2070 (&nr_node->node_lock){+...}-{2:2}, at: nr_rt_ioctl+0x1bb/0x1090 net/netrom/nr_route.c:697\n\nbut task is already holding lock:\n ffffffff8f7053b8 (nr_node_list_lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]\n ffffffff8f7053b8 (nr_node_list_lock){+...}-{2:2}, at: nr_dec_obs net/netrom/nr_route.c:462 [inline]\n ffffffff8f7053b8 (nr_node_list_lock){+...}-{2:2}, at: nr_rt_ioctl+0x10a/0x1090 net/netrom/nr_route.c:697\n\nwhich lock already depends on the new lock.\n\nthe existing dependency chain (in reverse order) is:\n\n-> #1 (nr_node_list_lock){+...}-{2:2}:\n        lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754\n        __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]\n        _raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178\n        spin_lock_bh include/linux/spinlock.h:356 [inline]\n        nr_remove_node net/netrom/nr_route.c:299 [inline]\n        nr_del_node+0x4b4/0x820 net/netrom/nr_route.c:355\n        nr_rt_ioctl+0xa95/0x1090 net/netrom/nr_route.c:683\n        sock_do_ioctl+0x158/0x460 net/socket.c:1222\n        sock_ioctl+0x629/0x8e0 net/socket.c:1341\n        vfs_ioctl fs/ioctl.c:51 [inline]\n        __do_sys_ioctl fs/ioctl.c:904 [inline]\n        __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890\n        do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n        do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\n       entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n-> #0 (&nr_node->node_lock){+...}-{2:2}:\n        check_prev_add kernel/locking/lockdep.c:3134 [inline]\n        check_prevs_add kernel/locking/lockdep.c:3253 [inline]\n        validate_chain+0x18cb/0x58e0 kernel/locking/lockdep.c:3869\n        __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137\n        lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754\n        __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]\n        _raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178\n        spin_lock_bh include/linux/spinlock.h:356 [inline]\n        nr_node_lock include/net/netrom.h:152 [inline]\n        nr_dec_obs net/netrom/nr_route.c:464 [inline]\n        nr_rt_ioctl+0x1bb/0x1090 net/netrom/nr_route.c:697\n        sock_do_ioctl+0x158/0x460 net/socket.c:1222\n        sock_ioctl+0x629/0x8e0 net/socket.c:1341\n        vfs_ioctl fs/ioctl.c:51 [inline]\n        __do_sys_ioctl fs/ioctl.c:904 [inline]\n        __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890\n        do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n        do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\n       entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nother info that might help us debug this:\n\n Possible unsafe locking scenario:\n\n       CPU0                    CPU1\n       ----                    ----\n  lock(nr_node_list_lock);\n                               lock(&nr_node->node_lock);\n                               lock(nr_node_list_lock);\n  lock(&nr_node->node_lock);\n\n *** DEADLOCK ***\n\n1 lock held by syz-executor350/5129:\n  #0: ffffffff8f7053b8 (nr_node_list_lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]\n  #0: ffffffff8f7053b8 (nr_node_list_lock){+...}-{2:2}, at: nr_dec_obs net/netrom/nr_route.c:462 [inline]\n  #0: ffffffff8f70\n---truncated---\n\n## Affected\n\n- `linux_kernel >= 2.6.12, < 4.19.316`\n- `linux_kernel >= 4.20, < 5.4.278`\n- `linux_kernel >= 5.5, < 5.10.219`\n- `linux_kernel >= 5.11, < 5.15.161`\n- `linux_kernel >= 5.16, < 6.1.93`\n- `linux_kernel >= 6.2, < 6.6.33`\n- `linux_kernel >= 6.7, < 6.8.12`\n- `linux_kernel >= 6.9, < 6.9.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.9.3`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}