CVE-2025-21875 (GCVE-0-2025-21875)
Vulnerability from cvelistv5
Published
2025-03-27 14:57
Modified
2025-05-04 07:23
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
mptcp: always handle address removal under msk socket lock
Syzkaller reported a lockdep splat in the PM control path:
WARNING: CPU: 0 PID: 6693 at ./include/net/sock.h:1711 sock_owned_by_me include/net/sock.h:1711 [inline]
WARNING: CPU: 0 PID: 6693 at ./include/net/sock.h:1711 msk_owned_by_me net/mptcp/protocol.h:363 [inline]
WARNING: CPU: 0 PID: 6693 at ./include/net/sock.h:1711 mptcp_pm_nl_addr_send_ack+0x57c/0x610 net/mptcp/pm_netlink.c:788
Modules linked in:
CPU: 0 UID: 0 PID: 6693 Comm: syz.0.205 Not tainted 6.14.0-rc2-syzkaller-00303-gad1b832bf1cf #0
Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:sock_owned_by_me include/net/sock.h:1711 [inline]
RIP: 0010:msk_owned_by_me net/mptcp/protocol.h:363 [inline]
RIP: 0010:mptcp_pm_nl_addr_send_ack+0x57c/0x610 net/mptcp/pm_netlink.c:788
Code: 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 ca 7b d3 f5 eb b9 e8 c3 7b d3 f5 90 0f 0b 90 e9 dd fb ff ff e8 b5 7b d3 f5 90 <0f> 0b 90 e9 3e fb ff ff 44 89 f1 80 e1 07 38 c1 0f 8c eb fb ff ff
RSP: 0000:ffffc900034f6f60 EFLAGS: 00010283
RAX: ffffffff8bee3c2b RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc90004d42000 RSI: 000000000000a407 RDI: 000000000000a408
RBP: ffffc900034f7030 R08: ffffffff8bee37f6 R09: 0100000000000000
R10: dffffc0000000000 R11: ffffed100bcc62e4 R12: ffff88805e6316e0
R13: ffff88805e630c00 R14: dffffc0000000000 R15: ffff88805e630c00
FS: 00007f7e9a7e96c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fd18ff8 CR3: 0000000032c24000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
mptcp_pm_remove_addr+0x103/0x1d0 net/mptcp/pm.c:59
mptcp_pm_remove_anno_addr+0x1f4/0x2f0 net/mptcp/pm_netlink.c:1486
mptcp_nl_remove_subflow_and_signal_addr net/mptcp/pm_netlink.c:1518 [inline]
mptcp_pm_nl_del_addr_doit+0x118d/0x1af0 net/mptcp/pm_netlink.c:1629
genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0xb1f/0xec0 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2543
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1892
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:733
____sys_sendmsg+0x53a/0x860 net/socket.c:2573
___sys_sendmsg net/socket.c:2627 [inline]
__sys_sendmsg+0x269/0x350 net/socket.c:2659
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
RIP: 0033:0x7f7e9998cde9
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:00007f7e9a7e9038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7e99ba5fa0 RCX: 00007f7e9998cde9
RDX: 000000002000c094 RSI: 0000400000000000 RDI: 0000000000000007
RBP: 00007f7e99a0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7e99ba5fa0 R15: 00007fff49231088
Indeed the PM can try to send a RM_ADDR over a msk without acquiring
first the msk socket lock.
The bugged code-path comes from an early optimization: when there
are no subflows, the PM should (usually) not send RM_ADDR
notifications.
The above statement is incorrect, as without locks another process
could concur
---truncated---
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| ▼ | Linux | Linux |
Version: b6c08380860b926752d57c8fa9911fa388c4b876 Version: b6c08380860b926752d57c8fa9911fa388c4b876 Version: b6c08380860b926752d57c8fa9911fa388c4b876 Version: b6c08380860b926752d57c8fa9911fa388c4b876 Version: b6c08380860b926752d57c8fa9911fa388c4b876 Version: b6c08380860b926752d57c8fa9911fa388c4b876 Version: b6c08380860b926752d57c8fa9911fa388c4b876 |
||||||
|
|||||||||
{
"containers": {
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{
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"programFiles": [
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},
{
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"status": "unaffected",
"version": "6.1.130",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.81",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.18",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.13.*",
"status": "unaffected",
"version": "6.13.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.14",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: always handle address removal under msk socket lock\n\nSyzkaller reported a lockdep splat in the PM control path:\n\n WARNING: CPU: 0 PID: 6693 at ./include/net/sock.h:1711 sock_owned_by_me include/net/sock.h:1711 [inline]\n WARNING: CPU: 0 PID: 6693 at ./include/net/sock.h:1711 msk_owned_by_me net/mptcp/protocol.h:363 [inline]\n WARNING: CPU: 0 PID: 6693 at ./include/net/sock.h:1711 mptcp_pm_nl_addr_send_ack+0x57c/0x610 net/mptcp/pm_netlink.c:788\n Modules linked in:\n CPU: 0 UID: 0 PID: 6693 Comm: syz.0.205 Not tainted 6.14.0-rc2-syzkaller-00303-gad1b832bf1cf #0\n Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024\n RIP: 0010:sock_owned_by_me include/net/sock.h:1711 [inline]\n RIP: 0010:msk_owned_by_me net/mptcp/protocol.h:363 [inline]\n RIP: 0010:mptcp_pm_nl_addr_send_ack+0x57c/0x610 net/mptcp/pm_netlink.c:788\n Code: 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 ca 7b d3 f5 eb b9 e8 c3 7b d3 f5 90 0f 0b 90 e9 dd fb ff ff e8 b5 7b d3 f5 90 \u003c0f\u003e 0b 90 e9 3e fb ff ff 44 89 f1 80 e1 07 38 c1 0f 8c eb fb ff ff\n RSP: 0000:ffffc900034f6f60 EFLAGS: 00010283\n RAX: ffffffff8bee3c2b RBX: 0000000000000001 RCX: 0000000000080000\n RDX: ffffc90004d42000 RSI: 000000000000a407 RDI: 000000000000a408\n RBP: ffffc900034f7030 R08: ffffffff8bee37f6 R09: 0100000000000000\n R10: dffffc0000000000 R11: ffffed100bcc62e4 R12: ffff88805e6316e0\n R13: ffff88805e630c00 R14: dffffc0000000000 R15: ffff88805e630c00\n FS: 00007f7e9a7e96c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000001b2fd18ff8 CR3: 0000000032c24000 CR4: 00000000003526f0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n \u003cTASK\u003e\n mptcp_pm_remove_addr+0x103/0x1d0 net/mptcp/pm.c:59\n mptcp_pm_remove_anno_addr+0x1f4/0x2f0 net/mptcp/pm_netlink.c:1486\n mptcp_nl_remove_subflow_and_signal_addr net/mptcp/pm_netlink.c:1518 [inline]\n mptcp_pm_nl_del_addr_doit+0x118d/0x1af0 net/mptcp/pm_netlink.c:1629\n genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]\n genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]\n genl_rcv_msg+0xb1f/0xec0 net/netlink/genetlink.c:1210\n netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2543\n genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219\n netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]\n netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348\n netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1892\n sock_sendmsg_nosec net/socket.c:718 [inline]\n __sock_sendmsg+0x221/0x270 net/socket.c:733\n ____sys_sendmsg+0x53a/0x860 net/socket.c:2573\n ___sys_sendmsg net/socket.c:2627 [inline]\n __sys_sendmsg+0x269/0x350 net/socket.c:2659\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 RIP: 0033:0x7f7e9998cde9\n 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 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48\n RSP: 002b:00007f7e9a7e9038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e\n RAX: ffffffffffffffda RBX: 00007f7e99ba5fa0 RCX: 00007f7e9998cde9\n RDX: 000000002000c094 RSI: 0000400000000000 RDI: 0000000000000007\n RBP: 00007f7e99a0e2a0 R08: 0000000000000000 R09: 0000000000000000\n R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\n R13: 0000000000000000 R14: 00007f7e99ba5fa0 R15: 00007fff49231088\n\nIndeed the PM can try to send a RM_ADDR over a msk without acquiring\nfirst the msk socket lock.\n\nThe bugged code-path comes from an early optimization: when there\nare no subflows, the PM should (usually) not send RM_ADDR\nnotifications.\n\nThe above statement is incorrect, as without locks another process\ncould concur\n---truncated---"
}
],
"providerMetadata": {
"dateUpdated": "2025-05-04T07:23:01.132Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/494ec285535632732eaa5786297a9ae4f731b5ff"
},
{
"url": "https://git.kernel.org/stable/c/7cca31035c05819643ffb5d7518e9a331b3f6651"
},
{
"url": "https://git.kernel.org/stable/c/8116fb4acd5d3f06cd37f84887dbe962b6703b1c"
},
{
"url": "https://git.kernel.org/stable/c/a05da2be18aae7e82572f8d795f41bb49f5dfc7d"
},
{
"url": "https://git.kernel.org/stable/c/4124b782ec2b1e2e490cf0bbf10f53dfd3479890"
},
{
"url": "https://git.kernel.org/stable/c/2c3de6dff4373f1036e003f49a32629359530bdb"
},
{
"url": "https://git.kernel.org/stable/c/f865c24bc55158313d5779fc81116023a6940ca3"
}
],
"title": "mptcp: always handle address removal under msk socket lock",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-21875",
"datePublished": "2025-03-27T14:57:06.154Z",
"dateReserved": "2024-12-29T08:45:45.781Z",
"dateUpdated": "2025-05-04T07:23:01.132Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-21875\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-03-27T15:15:55.307\",\"lastModified\":\"2025-03-27T16:45:12.210\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmptcp: always handle address removal under msk socket lock\\n\\nSyzkaller reported a lockdep splat in the PM control path:\\n\\n WARNING: CPU: 0 PID: 6693 at ./include/net/sock.h:1711 sock_owned_by_me include/net/sock.h:1711 [inline]\\n WARNING: CPU: 0 PID: 6693 at ./include/net/sock.h:1711 msk_owned_by_me net/mptcp/protocol.h:363 [inline]\\n WARNING: CPU: 0 PID: 6693 at ./include/net/sock.h:1711 mptcp_pm_nl_addr_send_ack+0x57c/0x610 net/mptcp/pm_netlink.c:788\\n Modules linked in:\\n CPU: 0 UID: 0 PID: 6693 Comm: syz.0.205 Not tainted 6.14.0-rc2-syzkaller-00303-gad1b832bf1cf #0\\n Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024\\n RIP: 0010:sock_owned_by_me include/net/sock.h:1711 [inline]\\n RIP: 0010:msk_owned_by_me net/mptcp/protocol.h:363 [inline]\\n RIP: 0010:mptcp_pm_nl_addr_send_ack+0x57c/0x610 net/mptcp/pm_netlink.c:788\\n Code: 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 ca 7b d3 f5 eb b9 e8 c3 7b d3 f5 90 0f 0b 90 e9 dd fb ff ff e8 b5 7b d3 f5 90 \u003c0f\u003e 0b 90 e9 3e fb ff ff 44 89 f1 80 e1 07 38 c1 0f 8c eb fb ff ff\\n RSP: 0000:ffffc900034f6f60 EFLAGS: 00010283\\n RAX: ffffffff8bee3c2b RBX: 0000000000000001 RCX: 0000000000080000\\n RDX: ffffc90004d42000 RSI: 000000000000a407 RDI: 000000000000a408\\n RBP: ffffc900034f7030 R08: ffffffff8bee37f6 R09: 0100000000000000\\n R10: dffffc0000000000 R11: ffffed100bcc62e4 R12: ffff88805e6316e0\\n R13: ffff88805e630c00 R14: dffffc0000000000 R15: ffff88805e630c00\\n FS: 00007f7e9a7e96c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000\\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n CR2: 0000001b2fd18ff8 CR3: 0000000032c24000 CR4: 00000000003526f0\\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\n Call Trace:\\n \u003cTASK\u003e\\n mptcp_pm_remove_addr+0x103/0x1d0 net/mptcp/pm.c:59\\n mptcp_pm_remove_anno_addr+0x1f4/0x2f0 net/mptcp/pm_netlink.c:1486\\n mptcp_nl_remove_subflow_and_signal_addr net/mptcp/pm_netlink.c:1518 [inline]\\n mptcp_pm_nl_del_addr_doit+0x118d/0x1af0 net/mptcp/pm_netlink.c:1629\\n genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]\\n genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]\\n genl_rcv_msg+0xb1f/0xec0 net/netlink/genetlink.c:1210\\n netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2543\\n genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219\\n netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]\\n netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348\\n netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1892\\n sock_sendmsg_nosec net/socket.c:718 [inline]\\n __sock_sendmsg+0x221/0x270 net/socket.c:733\\n ____sys_sendmsg+0x53a/0x860 net/socket.c:2573\\n ___sys_sendmsg net/socket.c:2627 [inline]\\n __sys_sendmsg+0x269/0x350 net/socket.c:2659\\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 RIP: 0033:0x7f7e9998cde9\\n 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 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48\\n RSP: 002b:00007f7e9a7e9038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e\\n RAX: ffffffffffffffda RBX: 00007f7e99ba5fa0 RCX: 00007f7e9998cde9\\n RDX: 000000002000c094 RSI: 0000400000000000 RDI: 0000000000000007\\n RBP: 00007f7e99a0e2a0 R08: 0000000000000000 R09: 0000000000000000\\n R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\\n R13: 0000000000000000 R14: 00007f7e99ba5fa0 R15: 00007fff49231088\\n\\nIndeed the PM can try to send a RM_ADDR over a msk without acquiring\\nfirst the msk socket lock.\\n\\nThe bugged code-path comes from an early optimization: when there\\nare no subflows, the PM should (usually) not send RM_ADDR\\nnotifications.\\n\\nThe above statement is incorrect, as without locks another process\\ncould concur\\n---truncated---\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2c3de6dff4373f1036e003f49a32629359530bdb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4124b782ec2b1e2e490cf0bbf10f53dfd3479890\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/494ec285535632732eaa5786297a9ae4f731b5ff\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7cca31035c05819643ffb5d7518e9a331b3f6651\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8116fb4acd5d3f06cd37f84887dbe962b6703b1c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a05da2be18aae7e82572f8d795f41bb49f5dfc7d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f865c24bc55158313d5779fc81116023a6940ca3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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