Vulnerability-Lookup

GHSA-H3C3-PP9V-WF35

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-06 12:30

Details

In the Linux kernel, the following vulnerability has been resolved:

mptcp: pm: in-kernel: always set ID as avail when rm endp

Syzkaller managed to find a combination of actions that was generating this warning:

WARNING: net/mptcp/pm_kernel.c:1074 at __mark_subflow_endp_available net/mptcp/pm_kernel.c:1074 [inline], CPU#1: syz.7.48/2535 WARNING: net/mptcp/pm_kernel.c:1074 at mptcp_pm_nl_fullmesh net/mptcp/pm_kernel.c:1446 [inline], CPU#1: syz.7.48/2535 WARNING: net/mptcp/pm_kernel.c:1074 at mptcp_pm_nl_set_flags_all net/mptcp/pm_kernel.c:1474 [inline], CPU#1: syz.7.48/2535 WARNING: net/mptcp/pm_kernel.c:1074 at mptcp_pm_nl_set_flags+0x5de/0x640 net/mptcp/pm_kernel.c:1538, CPU#1: syz.7.48/2535 Modules linked in: CPU: 1 UID: 0 PID: 2535 Comm: syz.7.48 Not tainted 6.18.0-03987-gea5f5e676cf5 #17 PREEMPT(voluntary) Hardware name: QEMU Ubuntu 25.10 PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014 RIP: 0010:__mark_subflow_endp_available net/mptcp/pm_kernel.c:1074 [inline] RIP: 0010:mptcp_pm_nl_fullmesh net/mptcp/pm_kernel.c:1446 [inline] RIP: 0010:mptcp_pm_nl_set_flags_all net/mptcp/pm_kernel.c:1474 [inline] RIP: 0010:mptcp_pm_nl_set_flags+0x5de/0x640 net/mptcp/pm_kernel.c:1538 Code: 89 c7 e8 c5 8c 73 fe e9 f7 fd ff ff 49 83 ef 80 e8 b7 8c 73 fe 4c 89 ff be 03 00 00 00 e8 4a 29 e3 fe eb ac e8 a3 8c 73 fe 90 <0f> 0b 90 e9 3d ff ff ff e8 95 8c 73 fe b8 a1 ff ff ff eb 1a e8 89 RSP: 0018:ffffc9001535b820 EFLAGS: 00010287 netdevsim0: tun_chr_ioctl cmd 1074025677 RAX: ffffffff82da294d RBX: 0000000000000001 RCX: 0000000000080000 RDX: ffffc900096d0000 RSI: 00000000000006d6 RDI: 00000000000006d7 netdevsim0: linktype set to 823 RBP: ffff88802cdb2240 R08: 00000000000104ae R09: ffffffffffffffff R10: ffffffff82da27d4 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88801246d8c0 R14: ffffc9001535b8b8 R15: ffff88802cdb1800 FS: 00007fc6ac5a76c0(0000) GS:ffff8880f90c8000(0000) knlGS:0000000000000000 netlink: 'syz.3.50': attribute type 5 has an invalid length. CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 netlink: 1232 bytes leftover after parsing attributes in process `syz.3.50'. CR2: 0000200000010000 CR3: 0000000025b1a000 CR4: 0000000000350ef0 Call Trace: mptcp_pm_set_flags net/mptcp/pm_netlink.c:277 [inline] mptcp_pm_nl_set_flags_doit+0x1d7/0x210 net/mptcp/pm_netlink.c:282 genl_family_rcv_msg_doit+0x117/0x180 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x3a8/0x3f0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x16d/0x240 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x3e9/0x4c0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x4ab/0x5b0 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg+0xc9/0xf0 net/socket.c:733 _syssendmsg+0x272/0x3b0 net/socket.c:2608 _sys_sendmsg+0x2de/0x320 net/socket.c:2662 __sys_sendmsg net/socket.c:2694 [inline] __do_sys_sendmsg net/socket.c:2699 [inline] __se_sys_sendmsg net/socket.c:2697 [inline] __x64_sys_sendmsg+0x110/0x1a0 net/socket.c:2697 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xed/0x360 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc6adb66f6d Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc6ac5a6ff8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fc6addf5fa0 RCX: 00007fc6adb66f6d RDX: 0000000000048084 RSI: 00002000000002c0 RDI: 000000000000000e RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000 ---truncated---

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43252"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T12:16:45Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: pm: in-kernel: always set ID as avail when rm endp\n\nSyzkaller managed to find a combination of actions that was generating\nthis warning:\n\n  WARNING: net/mptcp/pm_kernel.c:1074 at __mark_subflow_endp_available net/mptcp/pm_kernel.c:1074 [inline], CPU#1: syz.7.48/2535\n  WARNING: net/mptcp/pm_kernel.c:1074 at mptcp_pm_nl_fullmesh net/mptcp/pm_kernel.c:1446 [inline], CPU#1: syz.7.48/2535\n  WARNING: net/mptcp/pm_kernel.c:1074 at mptcp_pm_nl_set_flags_all net/mptcp/pm_kernel.c:1474 [inline], CPU#1: syz.7.48/2535\n  WARNING: net/mptcp/pm_kernel.c:1074 at mptcp_pm_nl_set_flags+0x5de/0x640 net/mptcp/pm_kernel.c:1538, CPU#1: syz.7.48/2535\n  Modules linked in:\n  CPU: 1 UID: 0 PID: 2535 Comm: syz.7.48 Not tainted 6.18.0-03987-gea5f5e676cf5 #17 PREEMPT(voluntary)\n  Hardware name: QEMU Ubuntu 25.10 PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014\n  RIP: 0010:__mark_subflow_endp_available net/mptcp/pm_kernel.c:1074 [inline]\n  RIP: 0010:mptcp_pm_nl_fullmesh net/mptcp/pm_kernel.c:1446 [inline]\n  RIP: 0010:mptcp_pm_nl_set_flags_all net/mptcp/pm_kernel.c:1474 [inline]\n  RIP: 0010:mptcp_pm_nl_set_flags+0x5de/0x640 net/mptcp/pm_kernel.c:1538\n  Code: 89 c7 e8 c5 8c 73 fe e9 f7 fd ff ff 49 83 ef 80 e8 b7 8c 73 fe 4c 89 ff be 03 00 00 00 e8 4a 29 e3 fe eb ac e8 a3 8c 73 fe 90 \u003c0f\u003e 0b 90 e9 3d ff ff ff e8 95 8c 73 fe b8 a1 ff ff ff eb 1a e8 89\n  RSP: 0018:ffffc9001535b820 EFLAGS: 00010287\n  netdevsim0: tun_chr_ioctl cmd 1074025677\n  RAX: ffffffff82da294d RBX: 0000000000000001 RCX: 0000000000080000\n  RDX: ffffc900096d0000 RSI: 00000000000006d6 RDI: 00000000000006d7\n  netdevsim0: linktype set to 823\n  RBP: ffff88802cdb2240 R08: 00000000000104ae R09: ffffffffffffffff\n  R10: ffffffff82da27d4 R11: 0000000000000000 R12: 0000000000000000\n  R13: ffff88801246d8c0 R14: ffffc9001535b8b8 R15: ffff88802cdb1800\n  FS:  00007fc6ac5a76c0(0000) GS:ffff8880f90c8000(0000) knlGS:0000000000000000\n  netlink: \u0027syz.3.50\u0027: attribute type 5 has an invalid length.\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  netlink: 1232 bytes leftover after parsing attributes in process `syz.3.50\u0027.\n  CR2: 0000200000010000 CR3: 0000000025b1a000 CR4: 0000000000350ef0\n  Call Trace:\n   \u003cTASK\u003e\n   mptcp_pm_set_flags net/mptcp/pm_netlink.c:277 [inline]\n   mptcp_pm_nl_set_flags_doit+0x1d7/0x210 net/mptcp/pm_netlink.c:282\n   genl_family_rcv_msg_doit+0x117/0x180 net/netlink/genetlink.c:1115\n   genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]\n   genl_rcv_msg+0x3a8/0x3f0 net/netlink/genetlink.c:1210\n   netlink_rcv_skb+0x16d/0x240 net/netlink/af_netlink.c:2550\n   genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219\n   netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]\n   netlink_unicast+0x3e9/0x4c0 net/netlink/af_netlink.c:1344\n   netlink_sendmsg+0x4ab/0x5b0 net/netlink/af_netlink.c:1894\n   sock_sendmsg_nosec net/socket.c:718 [inline]\n   __sock_sendmsg+0xc9/0xf0 net/socket.c:733\n   ____sys_sendmsg+0x272/0x3b0 net/socket.c:2608\n   ___sys_sendmsg+0x2de/0x320 net/socket.c:2662\n   __sys_sendmsg net/socket.c:2694 [inline]\n   __do_sys_sendmsg net/socket.c:2699 [inline]\n   __se_sys_sendmsg net/socket.c:2697 [inline]\n   __x64_sys_sendmsg+0x110/0x1a0 net/socket.c:2697\n   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n   do_syscall_64+0xed/0x360 arch/x86/entry/syscall_64.c:94\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n  RIP: 0033:0x7fc6adb66f6d\n  Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 e8 ff ff ff f7 d8 64 89 01 48\n  RSP: 002b:00007fc6ac5a6ff8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e\n  RAX: ffffffffffffffda RBX: 00007fc6addf5fa0 RCX: 00007fc6adb66f6d\n  RDX: 0000000000048084 RSI: 00002000000002c0 RDI: 000000000000000e\n  RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000\n  R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000\n---truncated---",
  "id": "GHSA-h3c3-pp9v-wf35",
  "modified": "2026-05-06T12:30:34Z",
  "published": "2026-05-06T12:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43252"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1b3ff4d88b508b73e2bbddb59356311efb7ba192"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4d480efd98e290c445f4ba476e4dcda5624b1aab"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c1d221e475e3d8eb8ed4702392d43f8c5134d1f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7e4d88e36e5d0b8ffda637999cbca64c81701a81"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d191101dee25567c2af3b28565f45346c33d65f5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d90d73ad183566c81320d453a223f610a280f210"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-43252 (GCVE-0-2026-43252)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-06 11:28

Title

mptcp: pm: in-kernel: always set ID as avail when rm endp

Summary

In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: in-kernel: always set ID as avail when rm endp Syzkaller managed to find a combination of actions that was generating this warning: WARNING: net/mptcp/pm_kernel.c:1074 at __mark_subflow_endp_available net/mptcp/pm_kernel.c:1074 [inline], CPU#1: syz.7.48/2535 WARNING: net/mptcp/pm_kernel.c:1074 at mptcp_pm_nl_fullmesh net/mptcp/pm_kernel.c:1446 [inline], CPU#1: syz.7.48/2535 WARNING: net/mptcp/pm_kernel.c:1074 at mptcp_pm_nl_set_flags_all net/mptcp/pm_kernel.c:1474 [inline], CPU#1: syz.7.48/2535 WARNING: net/mptcp/pm_kernel.c:1074 at mptcp_pm_nl_set_flags+0x5de/0x640 net/mptcp/pm_kernel.c:1538, CPU#1: syz.7.48/2535 Modules linked in: CPU: 1 UID: 0 PID: 2535 Comm: syz.7.48 Not tainted 6.18.0-03987-gea5f5e676cf5 #17 PREEMPT(voluntary) Hardware name: QEMU Ubuntu 25.10 PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014 RIP: 0010:__mark_subflow_endp_available net/mptcp/pm_kernel.c:1074 [inline] RIP: 0010:mptcp_pm_nl_fullmesh net/mptcp/pm_kernel.c:1446 [inline] RIP: 0010:mptcp_pm_nl_set_flags_all net/mptcp/pm_kernel.c:1474 [inline] RIP: 0010:mptcp_pm_nl_set_flags+0x5de/0x640 net/mptcp/pm_kernel.c:1538 Code: 89 c7 e8 c5 8c 73 fe e9 f7 fd ff ff 49 83 ef 80 e8 b7 8c 73 fe 4c 89 ff be 03 00 00 00 e8 4a 29 e3 fe eb ac e8 a3 8c 73 fe 90 <0f> 0b 90 e9 3d ff ff ff e8 95 8c 73 fe b8 a1 ff ff ff eb 1a e8 89 RSP: 0018:ffffc9001535b820 EFLAGS: 00010287 netdevsim0: tun_chr_ioctl cmd 1074025677 RAX: ffffffff82da294d RBX: 0000000000000001 RCX: 0000000000080000 RDX: ffffc900096d0000 RSI: 00000000000006d6 RDI: 00000000000006d7 netdevsim0: linktype set to 823 RBP: ffff88802cdb2240 R08: 00000000000104ae R09: ffffffffffffffff R10: ffffffff82da27d4 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88801246d8c0 R14: ffffc9001535b8b8 R15: ffff88802cdb1800 FS: 00007fc6ac5a76c0(0000) GS:ffff8880f90c8000(0000) knlGS:0000000000000000 netlink: 'syz.3.50': attribute type 5 has an invalid length. CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 netlink: 1232 bytes leftover after parsing attributes in process `syz.3.50'. CR2: 0000200000010000 CR3: 0000000025b1a000 CR4: 0000000000350ef0 Call Trace: <TASK> mptcp_pm_set_flags net/mptcp/pm_netlink.c:277 [inline] mptcp_pm_nl_set_flags_doit+0x1d7/0x210 net/mptcp/pm_netlink.c:282 genl_family_rcv_msg_doit+0x117/0x180 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x3a8/0x3f0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x16d/0x240 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x3e9/0x4c0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x4ab/0x5b0 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg+0xc9/0xf0 net/socket.c:733 ____sys_sendmsg+0x272/0x3b0 net/socket.c:2608 ___sys_sendmsg+0x2de/0x320 net/socket.c:2662 __sys_sendmsg net/socket.c:2694 [inline] __do_sys_sendmsg net/socket.c:2699 [inline] __se_sys_sendmsg net/socket.c:2697 [inline] __x64_sys_sendmsg+0x110/0x1a0 net/socket.c:2697 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xed/0x360 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc6adb66f6d Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc6ac5a6ff8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fc6addf5fa0 RCX: 00007fc6adb66f6d RDX: 0000000000048084 RSI: 00002000000002c0 RDI: 000000000000000e RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000 ---truncated---

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/d90d73ad183566c81…
	https://git.kernel.org/stable/c/1b3ff4d88b508b73e…
	https://git.kernel.org/stable/c/7c1d221e475e3d8eb…
	https://git.kernel.org/stable/c/7e4d88e36e5d0b8ff…
	https://git.kernel.org/stable/c/4d480efd98e290c44…
	https://git.kernel.org/stable/c/d191101dee25567c2…

Impacted products

Vendor

Product

Version

Linux

Affected: 027cca7029bee685a5ca5c4849be5a2c446ce046 , < d90d73ad183566c81320d453a223f610a280f210 (git)
Affected: cb24bdcdecba1c60169efb74d88900888df59907 , < 1b3ff4d88b508b73e2bbddb59356311efb7ba192 (git)
Affected: e255683c06df572ead96db5efb5d21be30c0efaa , < 7c1d221e475e3d8eb8ed4702392d43f8c5134d1f (git)
Affected: e255683c06df572ead96db5efb5d21be30c0efaa , < 7e4d88e36e5d0b8ffda637999cbca64c81701a81 (git)
Affected: e255683c06df572ead96db5efb5d21be30c0efaa , < 4d480efd98e290c445f4ba476e4dcda5624b1aab (git)
Affected: e255683c06df572ead96db5efb5d21be30c0efaa , < d191101dee25567c2af3b28565f45346c33d65f5 (git)
Affected: 47a049b38f567a2fbec76bc211ad7ad735519607 (git)

Linux

Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mptcp/pm_kernel.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d90d73ad183566c81320d453a223f610a280f210",
              "status": "affected",
              "version": "027cca7029bee685a5ca5c4849be5a2c446ce046",
              "versionType": "git"
            },
            {
              "lessThan": "1b3ff4d88b508b73e2bbddb59356311efb7ba192",
              "status": "affected",
              "version": "cb24bdcdecba1c60169efb74d88900888df59907",
              "versionType": "git"
            },
            {
              "lessThan": "7c1d221e475e3d8eb8ed4702392d43f8c5134d1f",
              "status": "affected",
              "version": "e255683c06df572ead96db5efb5d21be30c0efaa",
              "versionType": "git"
            },
            {
              "lessThan": "7e4d88e36e5d0b8ffda637999cbca64c81701a81",
              "status": "affected",
              "version": "e255683c06df572ead96db5efb5d21be30c0efaa",
              "versionType": "git"
            },
            {
              "lessThan": "4d480efd98e290c445f4ba476e4dcda5624b1aab",
              "status": "affected",
              "version": "e255683c06df572ead96db5efb5d21be30c0efaa",
              "versionType": "git"
            },
            {
              "lessThan": "d191101dee25567c2af3b28565f45346c33d65f5",
              "status": "affected",
              "version": "e255683c06df572ead96db5efb5d21be30c0efaa",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "47a049b38f567a2fbec76bc211ad7ad735519607",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mptcp/pm_kernel.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.167",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.78",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.167",
                  "versionStartIncluding": "6.1.107",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.130",
                  "versionStartIncluding": "6.6.48",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.78",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.16",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.6",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.10.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: pm: in-kernel: always set ID as avail when rm endp\n\nSyzkaller managed to find a combination of actions that was generating\nthis warning:\n\n  WARNING: net/mptcp/pm_kernel.c:1074 at __mark_subflow_endp_available net/mptcp/pm_kernel.c:1074 [inline], CPU#1: syz.7.48/2535\n  WARNING: net/mptcp/pm_kernel.c:1074 at mptcp_pm_nl_fullmesh net/mptcp/pm_kernel.c:1446 [inline], CPU#1: syz.7.48/2535\n  WARNING: net/mptcp/pm_kernel.c:1074 at mptcp_pm_nl_set_flags_all net/mptcp/pm_kernel.c:1474 [inline], CPU#1: syz.7.48/2535\n  WARNING: net/mptcp/pm_kernel.c:1074 at mptcp_pm_nl_set_flags+0x5de/0x640 net/mptcp/pm_kernel.c:1538, CPU#1: syz.7.48/2535\n  Modules linked in:\n  CPU: 1 UID: 0 PID: 2535 Comm: syz.7.48 Not tainted 6.18.0-03987-gea5f5e676cf5 #17 PREEMPT(voluntary)\n  Hardware name: QEMU Ubuntu 25.10 PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014\n  RIP: 0010:__mark_subflow_endp_available net/mptcp/pm_kernel.c:1074 [inline]\n  RIP: 0010:mptcp_pm_nl_fullmesh net/mptcp/pm_kernel.c:1446 [inline]\n  RIP: 0010:mptcp_pm_nl_set_flags_all net/mptcp/pm_kernel.c:1474 [inline]\n  RIP: 0010:mptcp_pm_nl_set_flags+0x5de/0x640 net/mptcp/pm_kernel.c:1538\n  Code: 89 c7 e8 c5 8c 73 fe e9 f7 fd ff ff 49 83 ef 80 e8 b7 8c 73 fe 4c 89 ff be 03 00 00 00 e8 4a 29 e3 fe eb ac e8 a3 8c 73 fe 90 \u003c0f\u003e 0b 90 e9 3d ff ff ff e8 95 8c 73 fe b8 a1 ff ff ff eb 1a e8 89\n  RSP: 0018:ffffc9001535b820 EFLAGS: 00010287\n  netdevsim0: tun_chr_ioctl cmd 1074025677\n  RAX: ffffffff82da294d RBX: 0000000000000001 RCX: 0000000000080000\n  RDX: ffffc900096d0000 RSI: 00000000000006d6 RDI: 00000000000006d7\n  netdevsim0: linktype set to 823\n  RBP: ffff88802cdb2240 R08: 00000000000104ae R09: ffffffffffffffff\n  R10: ffffffff82da27d4 R11: 0000000000000000 R12: 0000000000000000\n  R13: ffff88801246d8c0 R14: ffffc9001535b8b8 R15: ffff88802cdb1800\n  FS:  00007fc6ac5a76c0(0000) GS:ffff8880f90c8000(0000) knlGS:0000000000000000\n  netlink: \u0027syz.3.50\u0027: attribute type 5 has an invalid length.\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  netlink: 1232 bytes leftover after parsing attributes in process `syz.3.50\u0027.\n  CR2: 0000200000010000 CR3: 0000000025b1a000 CR4: 0000000000350ef0\n  Call Trace:\n   \u003cTASK\u003e\n   mptcp_pm_set_flags net/mptcp/pm_netlink.c:277 [inline]\n   mptcp_pm_nl_set_flags_doit+0x1d7/0x210 net/mptcp/pm_netlink.c:282\n   genl_family_rcv_msg_doit+0x117/0x180 net/netlink/genetlink.c:1115\n   genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]\n   genl_rcv_msg+0x3a8/0x3f0 net/netlink/genetlink.c:1210\n   netlink_rcv_skb+0x16d/0x240 net/netlink/af_netlink.c:2550\n   genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219\n   netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]\n   netlink_unicast+0x3e9/0x4c0 net/netlink/af_netlink.c:1344\n   netlink_sendmsg+0x4ab/0x5b0 net/netlink/af_netlink.c:1894\n   sock_sendmsg_nosec net/socket.c:718 [inline]\n   __sock_sendmsg+0xc9/0xf0 net/socket.c:733\n   ____sys_sendmsg+0x272/0x3b0 net/socket.c:2608\n   ___sys_sendmsg+0x2de/0x320 net/socket.c:2662\n   __sys_sendmsg net/socket.c:2694 [inline]\n   __do_sys_sendmsg net/socket.c:2699 [inline]\n   __se_sys_sendmsg net/socket.c:2697 [inline]\n   __x64_sys_sendmsg+0x110/0x1a0 net/socket.c:2697\n   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n   do_syscall_64+0xed/0x360 arch/x86/entry/syscall_64.c:94\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n  RIP: 0033:0x7fc6adb66f6d\n  Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 e8 ff ff ff f7 d8 64 89 01 48\n  RSP: 002b:00007fc6ac5a6ff8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e\n  RAX: ffffffffffffffda RBX: 00007fc6addf5fa0 RCX: 00007fc6adb66f6d\n  RDX: 0000000000048084 RSI: 00002000000002c0 RDI: 000000000000000e\n  RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000\n  R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-06T11:28:42.512Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d90d73ad183566c81320d453a223f610a280f210"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b3ff4d88b508b73e2bbddb59356311efb7ba192"
        },
        {
          "url": "https://git.kernel.org/stable/c/7c1d221e475e3d8eb8ed4702392d43f8c5134d1f"
        },
        {
          "url": "https://git.kernel.org/stable/c/7e4d88e36e5d0b8ffda637999cbca64c81701a81"
        },
        {
          "url": "https://git.kernel.org/stable/c/4d480efd98e290c445f4ba476e4dcda5624b1aab"
        },
        {
          "url": "https://git.kernel.org/stable/c/d191101dee25567c2af3b28565f45346c33d65f5"
        }
      ],
      "title": "mptcp: pm: in-kernel: always set ID as avail when rm endp",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43252",
    "datePublished": "2026-05-06T11:28:42.512Z",
    "dateReserved": "2026-05-01T14:12:55.996Z",
    "dateUpdated": "2026-05-06T11:28:42.512Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-H3C3-PP9V-WF35

CVE-2026-43252 (GCVE-0-2026-43252)

Tags

Sightings

Nomenclature