{"id":"CVE-2025-38324","title":"mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu().","summary":"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\nne…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 0189197f441602acdca3f97750d392a895b778fd < 2919297b18e5a5fb7e643f9e32c12c0b17cce1be","Linux >= 0189197f441602acdca3f97750d392a895b778fd < 36af82f25fbdcd719eb947c15ea874bf80bcf229","Linux >= 0189197f441602acdca3f97750d392a895b778fd < d8cd847fb8626872631cc22d44be5127b4ebfb74","Linux >= 0189197f441602acdca3f97750d392a895b778fd < 49b8a9d7d44401a186e20b1aaf591d2e62727aeb","Linux >= 0189197f441602acdca3f97750d392a895b778fd < a060781640012d5d5105072f4c44ed6ad6830ef9","Linux >= 0189197f441602acdca3f97750d392a895b778fd < 517bc6836ee9fcffe2539f6f6aa3fdd9c7a7ae73","Linux >= 0189197f441602acdca3f97750d392a895b778fd < f19cbd84e645e39bc3228e1191bb151ef0ffac8c","Linux >= 0189197f441602acdca3f97750d392a895b778fd < 6dbb0d97c5096072c78a6abffe393584e57ae945","Linux 4.1"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:54:38.465831Z"},"published":"2025-07-10","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:02:33.331Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38324","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"}],"tags":["cve.org"],"epss":0.00217,"epssPercentile":0.12296,"ingestedAt":"2026-11-05T22:38:31.954Z","slug":"CVE-2025-38324","body":"## Overview\n\nIn 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->mpls.platform_label is only updated under RTNL.\n\nLet's 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 <TASK>\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 <48> 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 </TASK>\n\n## Affected\n\n- `Linux >= 0189197f441602acdca3f97750d392a895b778fd < 2919297b18e5a5fb7e643f9e32c12c0b17cce1be`\n- `Linux >= 0189197f441602acdca3f97750d392a895b778fd < 36af82f25fbdcd719eb947c15ea874bf80bcf229`\n- `Linux >= 0189197f441602acdca3f97750d392a895b778fd < d8cd847fb8626872631cc22d44be5127b4ebfb74`\n- `Linux >= 0189197f441602acdca3f97750d392a895b778fd < 49b8a9d7d44401a186e20b1aaf591d2e62727aeb`\n- `Linux >= 0189197f441602acdca3f97750d392a895b778fd < a060781640012d5d5105072f4c44ed6ad6830ef9`\n- `Linux >= 0189197f441602acdca3f97750d392a895b778fd < 517bc6836ee9fcffe2539f6f6aa3fdd9c7a7ae73`\n- `Linux >= 0189197f441602acdca3f97750d392a895b778fd < f19cbd84e645e39bc3228e1191bb151ef0ffac8c`\n- `Linux >= 0189197f441602acdca3f97750d392a895b778fd < 6dbb0d97c5096072c78a6abffe393584e57ae945`\n- `Linux 4.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}