CVE-2025-38324 (GCVE-0-2025-38324)
Vulnerability from cvelistv5
Published
2025-07-10 08:14
Modified
2025-07-28 04:18
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu(). As syzbot reported [0], mpls_route_input_rcu() can be called from mpls_getroute(), where is under RTNL. net->mpls.platform_label is only updated under RTNL. Let's use rcu_dereference_rtnl() in mpls_route_input_rcu() to silence the splat. [0]: WARNING: suspicious RCU usage 6.15.0-rc7-syzkaller-00082-g5cdb2c77c4c3 #0 Not tainted ---------------------------- net/mpls/af_mpls.c:84 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz.2.4451/17730: #0: ffffffff9012a3e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffffffff9012a3e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x371/0xe90 net/core/rtnetlink.c:6961 stack backtrace: CPU: 1 UID: 0 PID: 17730 Comm: syz.2.4451 Not tainted 6.15.0-rc7-syzkaller-00082-g5cdb2c77c4c3 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120 lockdep_rcu_suspicious+0x166/0x260 kernel/locking/lockdep.c:6865 mpls_route_input_rcu+0x1d4/0x200 net/mpls/af_mpls.c:84 mpls_getroute+0x621/0x1ea0 net/mpls/af_mpls.c:2381 rtnetlink_rcv_msg+0x3c9/0xe90 net/core/rtnetlink.c:6964 netlink_rcv_skb+0x16d/0x440 net/netlink/af_netlink.c:2534 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x53a/0x7f0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg net/socket.c:727 [inline] ____sys_sendmsg+0xa98/0xc70 net/socket.c:2566 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2620 __sys_sendmmsg+0x200/0x420 net/socket.c:2709 __do_sys_sendmmsg net/socket.c:2736 [inline] __se_sys_sendmmsg net/socket.c:2733 [inline] __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2733 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0a2818e969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0a28f52038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f0a283b5fa0 RCX: 00007f0a2818e969 RDX: 0000000000000003 RSI: 0000200000000080 RDI: 0000000000000003 RBP: 00007f0a28210ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0a283b5fa0 R15: 00007ffce5e9f268 </TASK>
Impacted products
Vendor Product Version
Linux Linux Version: 0189197f441602acdca3f97750d392a895b778fd
Version: 0189197f441602acdca3f97750d392a895b778fd
Version: 0189197f441602acdca3f97750d392a895b778fd
Version: 0189197f441602acdca3f97750d392a895b778fd
Version: 0189197f441602acdca3f97750d392a895b778fd
Version: 0189197f441602acdca3f97750d392a895b778fd
Version: 0189197f441602acdca3f97750d392a895b778fd
Version: 0189197f441602acdca3f97750d392a895b778fd
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{
  "containers": {
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              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                  "versionEndExcluding": "5.4.295",
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              ],
              "negate": false,
              "operator": "OR"
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu().\n\nAs syzbot reported [0], mpls_route_input_rcu() can be called\nfrom mpls_getroute(), where is under RTNL.\n\nnet-\u003empls.platform_label is only updated under RTNL.\n\nLet\u0027s use rcu_dereference_rtnl() in mpls_route_input_rcu() to\nsilence the splat.\n\n[0]:\nWARNING: suspicious RCU usage\n6.15.0-rc7-syzkaller-00082-g5cdb2c77c4c3 #0 Not tainted\n ----------------------------\nnet/mpls/af_mpls.c:84 suspicious rcu_dereference_check() usage!\n\nother info that might help us debug this:\n\nrcu_scheduler_active = 2, debug_locks = 1\n1 lock held by syz.2.4451/17730:\n #0: ffffffff9012a3e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]\n #0: ffffffff9012a3e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x371/0xe90 net/core/rtnetlink.c:6961\n\nstack backtrace:\nCPU: 1 UID: 0 PID: 17730 Comm: syz.2.4451 Not tainted 6.15.0-rc7-syzkaller-00082-g5cdb2c77c4c3 #0 PREEMPT(full)\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120\n lockdep_rcu_suspicious+0x166/0x260 kernel/locking/lockdep.c:6865\n mpls_route_input_rcu+0x1d4/0x200 net/mpls/af_mpls.c:84\n mpls_getroute+0x621/0x1ea0 net/mpls/af_mpls.c:2381\n rtnetlink_rcv_msg+0x3c9/0xe90 net/core/rtnetlink.c:6964\n netlink_rcv_skb+0x16d/0x440 net/netlink/af_netlink.c:2534\n netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]\n netlink_unicast+0x53a/0x7f0 net/netlink/af_netlink.c:1339\n netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883\n sock_sendmsg_nosec net/socket.c:712 [inline]\n __sock_sendmsg net/socket.c:727 [inline]\n ____sys_sendmsg+0xa98/0xc70 net/socket.c:2566\n ___sys_sendmsg+0x134/0x1d0 net/socket.c:2620\n __sys_sendmmsg+0x200/0x420 net/socket.c:2709\n __do_sys_sendmmsg net/socket.c:2736 [inline]\n __se_sys_sendmmsg net/socket.c:2733 [inline]\n __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2733\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xcd/0x230 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7f0a2818e969\nCode: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f0a28f52038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133\nRAX: ffffffffffffffda RBX: 00007f0a283b5fa0 RCX: 00007f0a2818e969\nRDX: 0000000000000003 RSI: 0000200000000080 RDI: 0000000000000003\nRBP: 00007f0a28210ab1 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 0000000000000000 R14: 00007f0a283b5fa0 R15: 00007ffce5e9f268\n \u003c/TASK\u003e"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:18:48.551Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2919297b18e5a5fb7e643f9e32c12c0b17cce1be"
        },
        {
          "url": "https://git.kernel.org/stable/c/36af82f25fbdcd719eb947c15ea874bf80bcf229"
        },
        {
          "url": "https://git.kernel.org/stable/c/d8cd847fb8626872631cc22d44be5127b4ebfb74"
        },
        {
          "url": "https://git.kernel.org/stable/c/49b8a9d7d44401a186e20b1aaf591d2e62727aeb"
        },
        {
          "url": "https://git.kernel.org/stable/c/a060781640012d5d5105072f4c44ed6ad6830ef9"
        },
        {
          "url": "https://git.kernel.org/stable/c/517bc6836ee9fcffe2539f6f6aa3fdd9c7a7ae73"
        },
        {
          "url": "https://git.kernel.org/stable/c/f19cbd84e645e39bc3228e1191bb151ef0ffac8c"
        },
        {
          "url": "https://git.kernel.org/stable/c/6dbb0d97c5096072c78a6abffe393584e57ae945"
        }
      ],
      "title": "mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu().",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38324",
    "datePublished": "2025-07-10T08:14:58.857Z",
    "dateReserved": "2025-04-16T04:51:24.004Z",
    "dateUpdated": "2025-07-28T04:18:48.551Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38324\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-10T09:15:26.520\",\"lastModified\":\"2025-07-10T13:17:30.017\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu().\\n\\nAs syzbot reported [0], mpls_route_input_rcu() can be called\\nfrom mpls_getroute(), where is under RTNL.\\n\\nnet-\u003empls.platform_label is only updated under RTNL.\\n\\nLet\u0027s use rcu_dereference_rtnl() in mpls_route_input_rcu() to\\nsilence the splat.\\n\\n[0]:\\nWARNING: suspicious RCU usage\\n6.15.0-rc7-syzkaller-00082-g5cdb2c77c4c3 #0 Not tainted\\n ----------------------------\\nnet/mpls/af_mpls.c:84 suspicious rcu_dereference_check() usage!\\n\\nother info that might help us debug this:\\n\\nrcu_scheduler_active = 2, debug_locks = 1\\n1 lock held by syz.2.4451/17730:\\n #0: ffffffff9012a3e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]\\n #0: ffffffff9012a3e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x371/0xe90 net/core/rtnetlink.c:6961\\n\\nstack backtrace:\\nCPU: 1 UID: 0 PID: 17730 Comm: syz.2.4451 Not tainted 6.15.0-rc7-syzkaller-00082-g5cdb2c77c4c3 #0 PREEMPT(full)\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025\\nCall Trace:\\n \u003cTASK\u003e\\n __dump_stack lib/dump_stack.c:94 [inline]\\n dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120\\n lockdep_rcu_suspicious+0x166/0x260 kernel/locking/lockdep.c:6865\\n mpls_route_input_rcu+0x1d4/0x200 net/mpls/af_mpls.c:84\\n mpls_getroute+0x621/0x1ea0 net/mpls/af_mpls.c:2381\\n rtnetlink_rcv_msg+0x3c9/0xe90 net/core/rtnetlink.c:6964\\n netlink_rcv_skb+0x16d/0x440 net/netlink/af_netlink.c:2534\\n netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]\\n netlink_unicast+0x53a/0x7f0 net/netlink/af_netlink.c:1339\\n netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883\\n sock_sendmsg_nosec net/socket.c:712 [inline]\\n __sock_sendmsg net/socket.c:727 [inline]\\n ____sys_sendmsg+0xa98/0xc70 net/socket.c:2566\\n ___sys_sendmsg+0x134/0x1d0 net/socket.c:2620\\n __sys_sendmmsg+0x200/0x420 net/socket.c:2709\\n __do_sys_sendmmsg net/socket.c:2736 [inline]\\n __se_sys_sendmmsg net/socket.c:2733 [inline]\\n __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2733\\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\\n do_syscall_64+0xcd/0x230 arch/x86/entry/syscall_64.c:94\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\nRIP: 0033:0x7f0a2818e969\\nCode: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48\\nRSP: 002b:00007f0a28f52038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133\\nRAX: ffffffffffffffda RBX: 00007f0a283b5fa0 RCX: 00007f0a2818e969\\nRDX: 0000000000000003 RSI: 0000200000000080 RDI: 0000000000000003\\nRBP: 00007f0a28210ab1 R08: 0000000000000000 R09: 0000000000000000\\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\\nR13: 0000000000000000 R14: 00007f0a283b5fa0 R15: 00007ffce5e9f268\\n \u003c/TASK\u003e\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mpls: Usar rcu_dereference_rtnl() en mpls_route_input_rcu(). Como inform\u00f3 syzbot [0], mpls_route_input_rcu() puede llamarse desde mpls_getroute(), donde est\u00e1 bajo RTNL. net-\u0026gt;mpls.platform_label solo se actualiza bajo RTNL. Usemos rcu_dereference_rtnl() en mpls_route_input_rcu() para silenciar el mensaje. [0]: ADVERTENCIA: Uso sospechoso de RCU 6.15.0-rc7-syzkaller-00082-g5cdb2c77c4c3 #0 No contaminado ---------------------------- net/mpls/af_mpls.c:84 \u00a1Uso sospechoso de rcu_dereference_check()! Otra informaci\u00f3n que podr\u00eda ayudarnos a depurar esto: rcu_scheduler_active = 2, debug_locks = 1 1 bloqueo mantenido por syz.2.4451/17730: #0: ffffffff9012a3e8 (rtnl_mutex){+.+.}-{4:4}, en: rtnl_lock net/core/rtnetlink.c:80 [en l\u00ednea] #0: ffffffff9012a3e8 (rtnl_mutex){+.+.}-{4:4}, en: rtnetlink_rcv_msg+0x371/0xe90 net/core/rtnetlink.c:6961 seguimiento de pila: CPU: 1 UID: 0 PID: 17730 Comm: syz.2.4451 No contaminado 6.15.0-rc7-syzkaller-00082-g5cdb2c77c4c3 #0 PREEMPT(completo) Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/05/2025 Seguimiento de llamadas:   __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120 lockdep_rcu_suspicious+0x166/0x260 kernel/locking/lockdep.c:6865 mpls_route_input_rcu+0x1d4/0x200 net/mpls/af_mpls.c:84 mpls_getroute+0x621/0x1ea0 net/mpls/af_mpls.c:2381 rtnetlink_rcv_msg+0x3c9/0xe90 net/core/rtnetlink.c:6964 netlink_rcv_skb+0x16d/0x440 net/netlink/af_netlink.c:2534 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x53a/0x7f0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg net/socket.c:727 [inline] ____sys_sendmsg+0xa98/0xc70 net/socket.c:2566 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2620 __sys_sendmmsg+0x200/0x420 net/socket.c:2709 __do_sys_sendmmsg net/socket.c:2736 [inline] __se_sys_sendmmsg net/socket.c:2733 [inline] __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2733 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0a2818e969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u0026lt;48\u0026gt; 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0a28f52038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f0a283b5fa0 RCX: 00007f0a2818e969 RDX: 0000000000000003 RSI: 0000200000000080 RDI: 0000000000000003 RBP: 00007f0a28210ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0a283b5fa0 R15: 00007ffce5e9f268  \"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2919297b18e5a5fb7e643f9e32c12c0b17cce1be\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/36af82f25fbdcd719eb947c15ea874bf80bcf229\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/49b8a9d7d44401a186e20b1aaf591d2e62727aeb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/517bc6836ee9fcffe2539f6f6aa3fdd9c7a7ae73\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6dbb0d97c5096072c78a6abffe393584e57ae945\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a060781640012d5d5105072f4c44ed6ad6830ef9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d8cd847fb8626872631cc22d44be5127b4ebfb74\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f19cbd84e645e39bc3228e1191bb151ef0ffac8c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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