CVE-2025-71144 (GCVE-0-2025-71144)
Vulnerability from cvelistv5 – Published: 2026-01-14 15:08 – Updated: 2026-01-14 15:08
VLAI?
Title
mptcp: ensure context reset on disconnect()
Summary
In the Linux kernel, the following vulnerability has been resolved:
mptcp: ensure context reset on disconnect()
After the blamed commit below, if the MPC subflow is already in TCP_CLOSE
status or has fallback to TCP at mptcp_disconnect() time,
mptcp_do_fastclose() skips setting the `send_fastclose flag` and the later
__mptcp_close_ssk() does not reset anymore the related subflow context.
Any later connection will be created with both the `request_mptcp` flag
and the msk-level fallback status off (it is unconditionally cleared at
MPTCP disconnect time), leading to a warning in subflow_data_ready():
WARNING: CPU: 26 PID: 8996 at net/mptcp/subflow.c:1519 subflow_data_ready (net/mptcp/subflow.c:1519 (discriminator 13))
Modules linked in:
CPU: 26 UID: 0 PID: 8996 Comm: syz.22.39 Not tainted 6.18.0-rc7-05427-g11fc074f6c36 #1 PREEMPT(voluntary)
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
RIP: 0010:subflow_data_ready (net/mptcp/subflow.c:1519 (discriminator 13))
Code: 90 0f 0b 90 90 e9 04 fe ff ff e8 b7 1e f5 fe 89 ee bf 07 00 00 00 e8 db 19 f5 fe 83 fd 07 0f 84 35 ff ff ff e8 9d 1e f5 fe 90 <0f> 0b 90 e9 27 ff ff ff e8 8f 1e f5 fe 4c 89 e7 48 89 de e8 14 09
RSP: 0018:ffffc9002646fb30 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88813b218000 RCX: ffffffff825c8435
RDX: ffff8881300b3580 RSI: ffffffff825c8443 RDI: 0000000000000005
RBP: 000000000000000b R08: ffffffff825c8435 R09: 000000000000000b
R10: 0000000000000005 R11: 0000000000000007 R12: ffff888131ac0000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f88330af6c0(0000) GS:ffff888a93dd2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f88330aefe8 CR3: 000000010ff59000 CR4: 0000000000350ef0
Call Trace:
<TASK>
tcp_data_ready (net/ipv4/tcp_input.c:5356)
tcp_data_queue (net/ipv4/tcp_input.c:5445)
tcp_rcv_state_process (net/ipv4/tcp_input.c:7165)
tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1955)
__release_sock (include/net/sock.h:1158 (discriminator 6) net/core/sock.c:3180 (discriminator 6))
release_sock (net/core/sock.c:3737)
mptcp_sendmsg (net/mptcp/protocol.c:1763 net/mptcp/protocol.c:1857)
inet_sendmsg (net/ipv4/af_inet.c:853 (discriminator 7))
__sys_sendto (net/socket.c:727 (discriminator 15) net/socket.c:742 (discriminator 15) net/socket.c:2244 (discriminator 15))
__x64_sys_sendto (net/socket.c:2247)
do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1))
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
RIP: 0033:0x7f883326702d
Address the issue setting an explicit `fastclosing` flag at fastclose
time, and checking such flag after mptcp_do_fastclose().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Affected:
3a13454fd098ed51e733958488f8ec62859a9ed8 , < 5c7c7135468f3fc6379cde9777a2c18bfe92d82f
(git)
Affected: f6fb2cbc91a81178dea23d463503b4525a76825d , < 1c7c3a9314d8a7fc0e9a508606466a967c8e774a (git) Affected: ae155060247be8dcae3802a95bd1bdf93ab3215d , < f1a77dfc3b045c3dd5f6e64189b9f52b90399f07 (git) Affected: ae155060247be8dcae3802a95bd1bdf93ab3215d , < 86730ac255b0497a272704de9a1df559f5d6602e (git) Affected: 9ea05fabce31ff93a0adae8221c58bc6d7b832f3 (git) Affected: c4f7b0916b95fd2226e5ab98882482b08f52e1c0 (git) |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/mptcp/protocol.c",
"net/mptcp/protocol.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "5c7c7135468f3fc6379cde9777a2c18bfe92d82f",
"status": "affected",
"version": "3a13454fd098ed51e733958488f8ec62859a9ed8",
"versionType": "git"
},
{
"lessThan": "1c7c3a9314d8a7fc0e9a508606466a967c8e774a",
"status": "affected",
"version": "f6fb2cbc91a81178dea23d463503b4525a76825d",
"versionType": "git"
},
{
"lessThan": "f1a77dfc3b045c3dd5f6e64189b9f52b90399f07",
"status": "affected",
"version": "ae155060247be8dcae3802a95bd1bdf93ab3215d",
"versionType": "git"
},
{
"lessThan": "86730ac255b0497a272704de9a1df559f5d6602e",
"status": "affected",
"version": "ae155060247be8dcae3802a95bd1bdf93ab3215d",
"versionType": "git"
},
{
"status": "affected",
"version": "9ea05fabce31ff93a0adae8221c58bc6d7b832f3",
"versionType": "git"
},
{
"status": "affected",
"version": "c4f7b0916b95fd2226e5ab98882482b08f52e1c0",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/mptcp/protocol.c",
"net/mptcp/protocol.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.18"
},
{
"lessThan": "6.18",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.120",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.65",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.19-rc4",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.120",
"versionStartIncluding": "6.6.119",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.65",
"versionStartIncluding": "6.12.60",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.5",
"versionStartIncluding": "6.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.19-rc4",
"versionStartIncluding": "6.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.1.159",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.17.10",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: ensure context reset on disconnect()\n\nAfter the blamed commit below, if the MPC subflow is already in TCP_CLOSE\nstatus or has fallback to TCP at mptcp_disconnect() time,\nmptcp_do_fastclose() skips setting the `send_fastclose flag` and the later\n__mptcp_close_ssk() does not reset anymore the related subflow context.\n\nAny later connection will be created with both the `request_mptcp` flag\nand the msk-level fallback status off (it is unconditionally cleared at\nMPTCP disconnect time), leading to a warning in subflow_data_ready():\n\n WARNING: CPU: 26 PID: 8996 at net/mptcp/subflow.c:1519 subflow_data_ready (net/mptcp/subflow.c:1519 (discriminator 13))\n Modules linked in:\n CPU: 26 UID: 0 PID: 8996 Comm: syz.22.39 Not tainted 6.18.0-rc7-05427-g11fc074f6c36 #1 PREEMPT(voluntary)\n Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011\n RIP: 0010:subflow_data_ready (net/mptcp/subflow.c:1519 (discriminator 13))\n Code: 90 0f 0b 90 90 e9 04 fe ff ff e8 b7 1e f5 fe 89 ee bf 07 00 00 00 e8 db 19 f5 fe 83 fd 07 0f 84 35 ff ff ff e8 9d 1e f5 fe 90 \u003c0f\u003e 0b 90 e9 27 ff ff ff e8 8f 1e f5 fe 4c 89 e7 48 89 de e8 14 09\n RSP: 0018:ffffc9002646fb30 EFLAGS: 00010293\n RAX: 0000000000000000 RBX: ffff88813b218000 RCX: ffffffff825c8435\n RDX: ffff8881300b3580 RSI: ffffffff825c8443 RDI: 0000000000000005\n RBP: 000000000000000b R08: ffffffff825c8435 R09: 000000000000000b\n R10: 0000000000000005 R11: 0000000000000007 R12: ffff888131ac0000\n R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n FS: 00007f88330af6c0(0000) GS:ffff888a93dd2000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007f88330aefe8 CR3: 000000010ff59000 CR4: 0000000000350ef0\n Call Trace:\n \u003cTASK\u003e\n tcp_data_ready (net/ipv4/tcp_input.c:5356)\n tcp_data_queue (net/ipv4/tcp_input.c:5445)\n tcp_rcv_state_process (net/ipv4/tcp_input.c:7165)\n tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1955)\n __release_sock (include/net/sock.h:1158 (discriminator 6) net/core/sock.c:3180 (discriminator 6))\n release_sock (net/core/sock.c:3737)\n mptcp_sendmsg (net/mptcp/protocol.c:1763 net/mptcp/protocol.c:1857)\n inet_sendmsg (net/ipv4/af_inet.c:853 (discriminator 7))\n __sys_sendto (net/socket.c:727 (discriminator 15) net/socket.c:742 (discriminator 15) net/socket.c:2244 (discriminator 15))\n __x64_sys_sendto (net/socket.c:2247)\n do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1))\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n RIP: 0033:0x7f883326702d\n\nAddress the issue setting an explicit `fastclosing` flag at fastclose\ntime, and checking such flag after mptcp_do_fastclose()."
}
],
"providerMetadata": {
"dateUpdated": "2026-01-14T15:08:56.700Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/5c7c7135468f3fc6379cde9777a2c18bfe92d82f"
},
{
"url": "https://git.kernel.org/stable/c/1c7c3a9314d8a7fc0e9a508606466a967c8e774a"
},
{
"url": "https://git.kernel.org/stable/c/f1a77dfc3b045c3dd5f6e64189b9f52b90399f07"
},
{
"url": "https://git.kernel.org/stable/c/86730ac255b0497a272704de9a1df559f5d6602e"
}
],
"title": "mptcp: ensure context reset on disconnect()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-71144",
"datePublished": "2026-01-14T15:08:56.700Z",
"dateReserved": "2026-01-13T15:30:19.661Z",
"dateUpdated": "2026-01-14T15:08:56.700Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-71144\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-14T15:16:04.223\",\"lastModified\":\"2026-01-14T16:25:12.057\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmptcp: ensure context reset on disconnect()\\n\\nAfter the blamed commit below, if the MPC subflow is already in TCP_CLOSE\\nstatus or has fallback to TCP at mptcp_disconnect() time,\\nmptcp_do_fastclose() skips setting the `send_fastclose flag` and the later\\n__mptcp_close_ssk() does not reset anymore the related subflow context.\\n\\nAny later connection will be created with both the `request_mptcp` flag\\nand the msk-level fallback status off (it is unconditionally cleared at\\nMPTCP disconnect time), leading to a warning in subflow_data_ready():\\n\\n WARNING: CPU: 26 PID: 8996 at net/mptcp/subflow.c:1519 subflow_data_ready (net/mptcp/subflow.c:1519 (discriminator 13))\\n Modules linked in:\\n CPU: 26 UID: 0 PID: 8996 Comm: syz.22.39 Not tainted 6.18.0-rc7-05427-g11fc074f6c36 #1 PREEMPT(voluntary)\\n Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011\\n RIP: 0010:subflow_data_ready (net/mptcp/subflow.c:1519 (discriminator 13))\\n Code: 90 0f 0b 90 90 e9 04 fe ff ff e8 b7 1e f5 fe 89 ee bf 07 00 00 00 e8 db 19 f5 fe 83 fd 07 0f 84 35 ff ff ff e8 9d 1e f5 fe 90 \u003c0f\u003e 0b 90 e9 27 ff ff ff e8 8f 1e f5 fe 4c 89 e7 48 89 de e8 14 09\\n RSP: 0018:ffffc9002646fb30 EFLAGS: 00010293\\n RAX: 0000000000000000 RBX: ffff88813b218000 RCX: ffffffff825c8435\\n RDX: ffff8881300b3580 RSI: ffffffff825c8443 RDI: 0000000000000005\\n RBP: 000000000000000b R08: ffffffff825c8435 R09: 000000000000000b\\n R10: 0000000000000005 R11: 0000000000000007 R12: ffff888131ac0000\\n R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\\n FS: 00007f88330af6c0(0000) GS:ffff888a93dd2000(0000) knlGS:0000000000000000\\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n CR2: 00007f88330aefe8 CR3: 000000010ff59000 CR4: 0000000000350ef0\\n Call Trace:\\n \u003cTASK\u003e\\n tcp_data_ready (net/ipv4/tcp_input.c:5356)\\n tcp_data_queue (net/ipv4/tcp_input.c:5445)\\n tcp_rcv_state_process (net/ipv4/tcp_input.c:7165)\\n tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1955)\\n __release_sock (include/net/sock.h:1158 (discriminator 6) net/core/sock.c:3180 (discriminator 6))\\n release_sock (net/core/sock.c:3737)\\n mptcp_sendmsg (net/mptcp/protocol.c:1763 net/mptcp/protocol.c:1857)\\n inet_sendmsg (net/ipv4/af_inet.c:853 (discriminator 7))\\n __sys_sendto (net/socket.c:727 (discriminator 15) net/socket.c:742 (discriminator 15) net/socket.c:2244 (discriminator 15))\\n __x64_sys_sendto (net/socket.c:2247)\\n do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1))\\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\\n RIP: 0033:0x7f883326702d\\n\\nAddress the issue setting an explicit `fastclosing` flag at fastclose\\ntime, and checking such flag after mptcp_do_fastclose().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1c7c3a9314d8a7fc0e9a508606466a967c8e774a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5c7c7135468f3fc6379cde9777a2c18bfe92d82f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/86730ac255b0497a272704de9a1df559f5d6602e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f1a77dfc3b045c3dd5f6e64189b9f52b90399f07\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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