CVE-2025-21812 (GCVE-0-2025-21812)
Vulnerability from cvelistv5
Published
2025-02-27 20:01
Modified
2025-05-04 13:06
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ax25: rcu protect dev->ax25_ptr syzbot found a lockdep issue [1]. We should remove ax25 RTNL dependency in ax25_setsockopt() This should also fix a variety of possible UAF in ax25. [1] WARNING: possible circular locking dependency detected 6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0 Not tainted ------------------------------------------------------ syz.5.1818/12806 is trying to acquire lock: ffffffff8fcb3988 (rtnl_mutex){+.+.}-{4:4}, at: ax25_setsockopt+0xa55/0xe90 net/ax25/af_ax25.c:680 but task is already holding lock: ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline] ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: ax25_setsockopt+0x209/0xe90 net/ax25/af_ax25.c:574 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (sk_lock-AF_AX25){+.+.}-{0:0}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 lock_sock_nested+0x48/0x100 net/core/sock.c:3642 lock_sock include/net/sock.h:1618 [inline] ax25_kill_by_device net/ax25/af_ax25.c:101 [inline] ax25_device_event+0x24d/0x580 net/ax25/af_ax25.c:146 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85 __dev_notify_flags+0x207/0x400 dev_change_flags+0xf0/0x1a0 net/core/dev.c:9026 dev_ifsioc+0x7c8/0xe70 net/core/dev_ioctl.c:563 dev_ioctl+0x719/0x1340 net/core/dev_ioctl.c:820 sock_do_ioctl+0x240/0x460 net/socket.c:1234 sock_ioctl+0x626/0x8e0 net/socket.c:1339 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (rtnl_mutex){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735 ax25_setsockopt+0xa55/0xe90 net/ax25/af_ax25.c:680 do_sock_setsockopt+0x3af/0x720 net/socket.c:2324 __sys_setsockopt net/socket.c:2349 [inline] __do_sys_setsockopt net/socket.c:2355 [inline] __se_sys_setsockopt net/socket.c:2352 [inline] __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2352 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_AX25); lock(rtnl_mutex); lock(sk_lock-AF_AX25); lock(rtnl_mutex); *** DEADLOCK *** 1 lock held by syz.5.1818/12806: #0: ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline] #0: ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: ax25_setsockopt+0x209/0xe90 net/ax25/af_ax25.c:574 stack backtrace: CPU: 1 UID: 0 PID: 12806 Comm: syz.5.1818 Not tainted 6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/lockin ---truncated---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2802ed4ced27ebd474828fc67ffd7d66f11e3605Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7705d8a7f2c26c80973c81093db07c6022b2b30ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8937f5e38a218531dce2a89fae60e3adcc2311e1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/95fc45d1dea8e1253f8ec58abc5befb71553d666Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c2531db6de3c95551be58878f859c6a053b7eb2ePatch
Impacted products
Vendor Product Version
Linux Linux Version: c433570458e49bccea5c551df628d058b3526289
Version: c433570458e49bccea5c551df628d058b3526289
Version: c433570458e49bccea5c551df628d058b3526289
Version: c433570458e49bccea5c551df628d058b3526289
Version: c433570458e49bccea5c551df628d058b3526289
Version: 7f93d703e276311dd289c9a520ce9e8c8fa2858c
Version: c0e93a6d36135d5082cb3af8352f5b69c9f58d6e
Version: c39b8fd4997bf99503b8e48d8cb0eedb1d9a54f0
Version: 26a5adc8eb26d170058645c3cccd4d19165bec16
Version: 3e881d8764ed9b04ae3e5c3e5d132acb75ef91ba
Version: 77768c96dcf860c43b970b87b2a09229f84ea560
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   Linux Linux Version: 5.0
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nax25: rcu protect dev-\u003eax25_ptr\n\nsyzbot found a lockdep issue [1].\n\nWe should remove ax25 RTNL dependency in ax25_setsockopt()\n\nThis should also fix a variety of possible UAF in ax25.\n\n[1]\n\nWARNING: possible circular locking dependency detected\n6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0 Not tainted\n------------------------------------------------------\nsyz.5.1818/12806 is trying to acquire lock:\n ffffffff8fcb3988 (rtnl_mutex){+.+.}-{4:4}, at: ax25_setsockopt+0xa55/0xe90 net/ax25/af_ax25.c:680\n\nbut task is already holding lock:\n ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline]\n ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: ax25_setsockopt+0x209/0xe90 net/ax25/af_ax25.c:574\n\nwhich lock already depends on the new lock.\n\nthe existing dependency chain (in reverse order) is:\n\n-\u003e #1 (sk_lock-AF_AX25){+.+.}-{0:0}:\n        lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849\n        lock_sock_nested+0x48/0x100 net/core/sock.c:3642\n        lock_sock include/net/sock.h:1618 [inline]\n        ax25_kill_by_device net/ax25/af_ax25.c:101 [inline]\n        ax25_device_event+0x24d/0x580 net/ax25/af_ax25.c:146\n        notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85\n       __dev_notify_flags+0x207/0x400\n        dev_change_flags+0xf0/0x1a0 net/core/dev.c:9026\n        dev_ifsioc+0x7c8/0xe70 net/core/dev_ioctl.c:563\n        dev_ioctl+0x719/0x1340 net/core/dev_ioctl.c:820\n        sock_do_ioctl+0x240/0x460 net/socket.c:1234\n        sock_ioctl+0x626/0x8e0 net/socket.c:1339\n        vfs_ioctl fs/ioctl.c:51 [inline]\n        __do_sys_ioctl fs/ioctl.c:906 [inline]\n        __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892\n        do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n        do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n       entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n-\u003e #0 (rtnl_mutex){+.+.}-{4:4}:\n        check_prev_add kernel/locking/lockdep.c:3161 [inline]\n        check_prevs_add kernel/locking/lockdep.c:3280 [inline]\n        validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904\n        __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226\n        lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849\n        __mutex_lock_common kernel/locking/mutex.c:585 [inline]\n        __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735\n        ax25_setsockopt+0xa55/0xe90 net/ax25/af_ax25.c:680\n        do_sock_setsockopt+0x3af/0x720 net/socket.c:2324\n        __sys_setsockopt net/socket.c:2349 [inline]\n        __do_sys_setsockopt net/socket.c:2355 [inline]\n        __se_sys_setsockopt net/socket.c:2352 [inline]\n        __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2352\n        do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n        do_syscall_64+0xf3/0x230 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(sk_lock-AF_AX25);\n                               lock(rtnl_mutex);\n                               lock(sk_lock-AF_AX25);\n  lock(rtnl_mutex);\n\n *** DEADLOCK ***\n\n1 lock held by syz.5.1818/12806:\n  #0: ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline]\n  #0: ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: ax25_setsockopt+0x209/0xe90 net/ax25/af_ax25.c:574\n\nstack backtrace:\nCPU: 1 UID: 0 PID: 12806 Comm: syz.5.1818 Not tainted 6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024\nCall Trace:\n \u003cTASK\u003e\n  __dump_stack lib/dump_stack.c:94 [inline]\n  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120\n  print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074\n  check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206\n  check_prev_add kernel/locking/lockdep.c:3161 [inline]\n  check_prevs_add kernel/lockin\n---truncated---"
        }
      ],
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        "dateUpdated": "2025-05-04T13:06:36.402Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2802ed4ced27ebd474828fc67ffd7d66f11e3605"
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        {
          "url": "https://git.kernel.org/stable/c/7705d8a7f2c26c80973c81093db07c6022b2b30e"
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          "url": "https://git.kernel.org/stable/c/95fc45d1dea8e1253f8ec58abc5befb71553d666"
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      "title": "ax25: rcu protect dev-\u003eax25_ptr",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21812",
    "datePublished": "2025-02-27T20:01:02.837Z",
    "dateReserved": "2024-12-29T08:45:45.774Z",
    "dateUpdated": "2025-05-04T13:06:36.402Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21812\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-27T20:16:03.783\",\"lastModified\":\"2025-03-21T18:30:33.520\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nax25: rcu protect dev-\u003eax25_ptr\\n\\nsyzbot found a lockdep issue [1].\\n\\nWe should remove ax25 RTNL dependency in ax25_setsockopt()\\n\\nThis should also fix a variety of possible UAF in ax25.\\n\\n[1]\\n\\nWARNING: possible circular locking dependency detected\\n6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0 Not tainted\\n------------------------------------------------------\\nsyz.5.1818/12806 is trying to acquire lock:\\n ffffffff8fcb3988 (rtnl_mutex){+.+.}-{4:4}, at: ax25_setsockopt+0xa55/0xe90 net/ax25/af_ax25.c:680\\n\\nbut task is already holding lock:\\n ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline]\\n ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: ax25_setsockopt+0x209/0xe90 net/ax25/af_ax25.c:574\\n\\nwhich lock already depends on the new lock.\\n\\nthe existing dependency chain (in reverse order) is:\\n\\n-\u003e #1 (sk_lock-AF_AX25){+.+.}-{0:0}:\\n        lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849\\n        lock_sock_nested+0x48/0x100 net/core/sock.c:3642\\n        lock_sock include/net/sock.h:1618 [inline]\\n        ax25_kill_by_device net/ax25/af_ax25.c:101 [inline]\\n        ax25_device_event+0x24d/0x580 net/ax25/af_ax25.c:146\\n        notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85\\n       __dev_notify_flags+0x207/0x400\\n        dev_change_flags+0xf0/0x1a0 net/core/dev.c:9026\\n        dev_ifsioc+0x7c8/0xe70 net/core/dev_ioctl.c:563\\n        dev_ioctl+0x719/0x1340 net/core/dev_ioctl.c:820\\n        sock_do_ioctl+0x240/0x460 net/socket.c:1234\\n        sock_ioctl+0x626/0x8e0 net/socket.c:1339\\n        vfs_ioctl fs/ioctl.c:51 [inline]\\n        __do_sys_ioctl fs/ioctl.c:906 [inline]\\n        __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892\\n        do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n        do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\\n       entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\n-\u003e #0 (rtnl_mutex){+.+.}-{4:4}:\\n        check_prev_add kernel/locking/lockdep.c:3161 [inline]\\n        check_prevs_add kernel/locking/lockdep.c:3280 [inline]\\n        validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904\\n        __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226\\n        lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849\\n        __mutex_lock_common kernel/locking/mutex.c:585 [inline]\\n        __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735\\n        ax25_setsockopt+0xa55/0xe90 net/ax25/af_ax25.c:680\\n        do_sock_setsockopt+0x3af/0x720 net/socket.c:2324\\n        __sys_setsockopt net/socket.c:2349 [inline]\\n        __do_sys_setsockopt net/socket.c:2355 [inline]\\n        __se_sys_setsockopt net/socket.c:2352 [inline]\\n        __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2352\\n        do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n        do_syscall_64+0xf3/0x230 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(sk_lock-AF_AX25);\\n                               lock(rtnl_mutex);\\n                               lock(sk_lock-AF_AX25);\\n  lock(rtnl_mutex);\\n\\n *** DEADLOCK ***\\n\\n1 lock held by syz.5.1818/12806:\\n  #0: ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline]\\n  #0: ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: ax25_setsockopt+0x209/0xe90 net/ax25/af_ax25.c:574\\n\\nstack backtrace:\\nCPU: 1 UID: 0 PID: 12806 Comm: syz.5.1818 Not tainted 6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024\\nCall Trace:\\n \u003cTASK\u003e\\n  __dump_stack lib/dump_stack.c:94 [inline]\\n  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120\\n  print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074\\n  check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206\\n  check_prev_add kernel/locking/lockdep.c:3161 [inline]\\n  check_prevs_add kernel/lockin\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ax25: rcu protect dev-\u0026gt;ax25_ptr syzbot encontr\u00f3 un problema de lockdep [1]. Deber\u00edamos eliminar la dependencia RTNL de ax25 en ax25_setsockopt(). Esto tambi\u00e9n deber\u00eda solucionar una variedad de posibles UAF en ax25. [1] ADVERTENCIA: se detect\u00f3 una posible dependencia de bloqueo circular 6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0 Not tainted ------------------------------------------------------ syz.5.1818/12806 is trying to acquire lock: ffffffff8fcb3988 (rtnl_mutex){+.+.}-{4:4}, at: ax25_setsockopt+0xa55/0xe90 net/ax25/af_ax25.c:680 but task is already holding lock: ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline] ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: ax25_setsockopt+0x209/0xe90 net/ax25/af_ax25.c:574 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -\u0026gt; #1 (sk_lock-AF_AX25){+.+.}-{0:0}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 lock_sock_nested+0x48/0x100 net/core/sock.c:3642 lock_sock include/net/sock.h:1618 [inline] ax25_kill_by_device net/ax25/af_ax25.c:101 [inline] ax25_device_event+0x24d/0x580 net/ax25/af_ax25.c:146 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85 __dev_notify_flags+0x207/0x400 dev_change_flags+0xf0/0x1a0 net/core/dev.c:9026 dev_ifsioc+0x7c8/0xe70 net/core/dev_ioctl.c:563 dev_ioctl+0x719/0x1340 net/core/dev_ioctl.c:820 sock_do_ioctl+0x240/0x460 net/socket.c:1234 sock_ioctl+0x626/0x8e0 net/socket.c:1339 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -\u0026gt; #0 (rtnl_mutex){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735 ax25_setsockopt+0xa55/0xe90 net/ax25/af_ax25.c:680 do_sock_setsockopt+0x3af/0x720 net/socket.c:2324 __sys_setsockopt net/socket.c:2349 [inline] __do_sys_setsockopt net/socket.c:2355 [inline] __se_sys_setsockopt net/socket.c:2352 [inline] __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2352 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_AX25); lock(rtnl_mutex); lock(sk_lock-AF_AX25); lock(rtnl_mutex); *** DEADLOCK *** 1 lock held by syz.5.1818/12806: #0: ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline] #0: ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: ax25_setsockopt+0x209/0xe90 net/ax25/af_ax25.c:574 stack backtrace: CPU: 1 UID: 0 PID: 12806 Comm: syz.5.1818 Not tainted 6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace:  __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/lockin ---truncated--- \"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.18.132\",\"versionEndExcluding\":\"3.19\",\"matchCriteriaId\":\"FB301D8A-4CE6-493F-94B4-AFA5737C1EC1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.4.170\",\"versionEndExcluding\":\"4.5\",\"matchCriteriaId\":\"6D2CF938-4FA1-416D-AC49-F221731F57ED\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.9.149\",\"versionEndExcluding\":\"4.10\",\"matchCriteriaId\":\"2190C728-9805-46C1-BD8D-005E50F0EEB9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.14.92\",\"versionEndExcluding\":\"4.15\",\"matchCriteriaId\":\"38A1AC7C-17D5-4E10-97A0-ED3637CD9D40\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.19.14\",\"versionEndExcluding\":\"4.20\",\"matchCriteriaId\":\"9C3378FE-6F2A-4485-958F-60A3779C280F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20.1\",\"versionEndExcluding\":\"6.1.129\",\"matchCriteriaId\":\"F12C53B3-1DD7-47D6-857F-A60A2DB0DF0A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.76\",\"matchCriteriaId\":\"A6D70701-9CB6-4222-A957-00A419878993\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.13\",\"matchCriteriaId\":\"2897389C-A8C3-4D69-90F2-E701B3D66373\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.13.2\",\"matchCriteriaId\":\"6D4116B1-1BFD-4F23-BA84-169CC05FC5A3\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2802ed4ced27ebd474828fc67ffd7d66f11e3605\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7705d8a7f2c26c80973c81093db07c6022b2b30e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8937f5e38a218531dce2a89fae60e3adcc2311e1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/95fc45d1dea8e1253f8ec58abc5befb71553d666\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c2531db6de3c95551be58878f859c6a053b7eb2e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-21812\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-03-04T18:00:00.916644Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-03-04T18:00:02.524Z\"}}], \"cna\": {\"title\": \"ax25: rcu protect dev-\u003eax25_ptr\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"c433570458e49bccea5c551df628d058b3526289\", \"lessThan\": \"2802ed4ced27ebd474828fc67ffd7d66f11e3605\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c433570458e49bccea5c551df628d058b3526289\", \"lessThan\": \"7705d8a7f2c26c80973c81093db07c6022b2b30e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c433570458e49bccea5c551df628d058b3526289\", \"lessThan\": \"8937f5e38a218531dce2a89fae60e3adcc2311e1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c433570458e49bccea5c551df628d058b3526289\", \"lessThan\": \"c2531db6de3c95551be58878f859c6a053b7eb2e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c433570458e49bccea5c551df628d058b3526289\", \"lessThan\": \"95fc45d1dea8e1253f8ec58abc5befb71553d666\", \"versionType\": \"git\"}], \"programFiles\": [\"include/linux/netdevice.h\", \"include/net/ax25.h\", \"net/ax25/af_ax25.c\", \"net/ax25/ax25_dev.c\", \"net/ax25/ax25_ip.c\", \"net/ax25/ax25_out.c\", \"net/ax25/ax25_route.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.0\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.0\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.129\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.76\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.13.*\"}, {\"status\": \"unaffected\", \"version\": \"6.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"include/linux/netdevice.h\", \"include/net/ax25.h\", \"net/ax25/af_ax25.c\", \"net/ax25/ax25_dev.c\", \"net/ax25/ax25_ip.c\", \"net/ax25/ax25_out.c\", \"net/ax25/ax25_route.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/2802ed4ced27ebd474828fc67ffd7d66f11e3605\"}, {\"url\": \"https://git.kernel.org/stable/c/7705d8a7f2c26c80973c81093db07c6022b2b30e\"}, {\"url\": \"https://git.kernel.org/stable/c/8937f5e38a218531dce2a89fae60e3adcc2311e1\"}, {\"url\": \"https://git.kernel.org/stable/c/c2531db6de3c95551be58878f859c6a053b7eb2e\"}, {\"url\": \"https://git.kernel.org/stable/c/95fc45d1dea8e1253f8ec58abc5befb71553d666\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nax25: rcu protect dev-\u003eax25_ptr\\n\\nsyzbot found a lockdep issue [1].\\n\\nWe should remove ax25 RTNL dependency in ax25_setsockopt()\\n\\nThis should also fix a variety of possible UAF in ax25.\\n\\n[1]\\n\\nWARNING: possible circular locking dependency detected\\n6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0 Not tainted\\n------------------------------------------------------\\nsyz.5.1818/12806 is trying to acquire lock:\\n ffffffff8fcb3988 (rtnl_mutex){+.+.}-{4:4}, at: ax25_setsockopt+0xa55/0xe90 net/ax25/af_ax25.c:680\\n\\nbut task is already holding lock:\\n ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline]\\n ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: ax25_setsockopt+0x209/0xe90 net/ax25/af_ax25.c:574\\n\\nwhich lock already depends on the new lock.\\n\\nthe existing dependency chain (in reverse order) is:\\n\\n-\u003e #1 (sk_lock-AF_AX25){+.+.}-{0:0}:\\n        lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849\\n        lock_sock_nested+0x48/0x100 net/core/sock.c:3642\\n        lock_sock include/net/sock.h:1618 [inline]\\n        ax25_kill_by_device net/ax25/af_ax25.c:101 [inline]\\n        ax25_device_event+0x24d/0x580 net/ax25/af_ax25.c:146\\n        notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85\\n       __dev_notify_flags+0x207/0x400\\n        dev_change_flags+0xf0/0x1a0 net/core/dev.c:9026\\n        dev_ifsioc+0x7c8/0xe70 net/core/dev_ioctl.c:563\\n        dev_ioctl+0x719/0x1340 net/core/dev_ioctl.c:820\\n        sock_do_ioctl+0x240/0x460 net/socket.c:1234\\n        sock_ioctl+0x626/0x8e0 net/socket.c:1339\\n        vfs_ioctl fs/ioctl.c:51 [inline]\\n        __do_sys_ioctl fs/ioctl.c:906 [inline]\\n        __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892\\n        do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n        do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\\n       entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\n-\u003e #0 (rtnl_mutex){+.+.}-{4:4}:\\n        check_prev_add kernel/locking/lockdep.c:3161 [inline]\\n        check_prevs_add kernel/locking/lockdep.c:3280 [inline]\\n        validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904\\n        __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226\\n        lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849\\n        __mutex_lock_common kernel/locking/mutex.c:585 [inline]\\n        __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735\\n        ax25_setsockopt+0xa55/0xe90 net/ax25/af_ax25.c:680\\n        do_sock_setsockopt+0x3af/0x720 net/socket.c:2324\\n        __sys_setsockopt net/socket.c:2349 [inline]\\n        __do_sys_setsockopt net/socket.c:2355 [inline]\\n        __se_sys_setsockopt net/socket.c:2352 [inline]\\n        __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2352\\n        do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n        do_syscall_64+0xf3/0x230 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(sk_lock-AF_AX25);\\n                               lock(rtnl_mutex);\\n                               lock(sk_lock-AF_AX25);\\n  lock(rtnl_mutex);\\n\\n *** DEADLOCK ***\\n\\n1 lock held by syz.5.1818/12806:\\n  #0: ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline]\\n  #0: ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: ax25_setsockopt+0x209/0xe90 net/ax25/af_ax25.c:574\\n\\nstack backtrace:\\nCPU: 1 UID: 0 PID: 12806 Comm: syz.5.1818 Not tainted 6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024\\nCall Trace:\\n \u003cTASK\u003e\\n  __dump_stack lib/dump_stack.c:94 [inline]\\n  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120\\n  print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074\\n  check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206\\n  check_prev_add kernel/locking/lockdep.c:3161 [inline]\\n  check_prevs_add kernel/lockin\\n---truncated---\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-03-24T15:40:47.048Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-21812\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-03-24T15:40:47.048Z\", \"dateReserved\": \"2024-12-29T08:45:45.774Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-02-27T20:01:02.837Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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