CVE-2024-50293

Estado: ModificadaAlta (7.8)—

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

net/smc: do not leave a dangling sk pointer in __smc_create()

Thanks to commit 4bbd360a5084 ("socket: Print pf->create() when it does not clear sock->sk on failure."), syzbot found an issue with AF_SMC:

For reference, see commit 2d859aff775d ("Merge branch 'do-not-leave-dangling-sk-pointers-in-pf-create-functions'")

Detalles técnicos trazas, registros y código del informe original

smc_create must clear sock->sk on failure, family: 43, type: 1, protocol: 0
 WARNING: CPU: 0 PID: 5827 at net/socket.c:1565 __sock_create+0x96f/0xa30 net/socket.c:1563
Modules linked in:
CPU: 0 UID: 0 PID: 5827 Comm: syz-executor259 Not tainted 6.12.0-rc6-next-20241106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
 RIP: 0010:__sock_create+0x96f/0xa30 net/socket.c:1563
Code: 03 00 74 08 4c 89 e7 e8 4f 3b 85 f8 49 8b 34 24 48 c7 c7 40 89 0c 8d 8b 54 24 04 8b 4c 24 0c 44 8b 44 24 08 e8 32 78 db f7 90 <0f> 0b 90 90 e9 d3 fd ff ff 89 e9 80 e1 07 fe c1 38 c1 0f 8c ee f7
RSP: 0018:ffffc90003e4fda0 EFLAGS: 00010246
RAX: 099c6f938c7f4700 RBX: 1ffffffff1a595fd RCX: ffff888034823c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000ffffffe9 R08: ffffffff81567052 R09: 1ffff920007c9f50
R10: dffffc0000000000 R11: fffff520007c9f51 R12: ffffffff8d2cafe8
R13: 1ffffffff1a595fe R14: ffffffff9a789c40 R15: ffff8880764298c0
FS:  000055557b518380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa62ff43225 CR3: 0000000031628000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
  sock_create net/socket.c:1616 [inline]
  __sys_socket_create net/socket.c:1653 [inline]
  __sys_socket+0x150/0x3c0 net/socket.c:1700
  __do_sys_socket net/socket.c:1714 [inline]
  __se_sys_socket net/socket.c:1712 [inline]

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.21%
Percentil entre todas las CVEs puntuadas: 11
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto principalT1059 Command and Scripting Interpreterexecution70 %

CWE-416 (use-after-free) con AV:L/PR:L permite escalada local. La fuga de puntero sk en __smc_create() habilita ejecución de código con privilegios elevados tras explotar la referencia colgante.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Execution Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-416
CWE-416

Referencias

JSON original (NVD)

Mostrar

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          "timestamp": "2025-10-01T20:14:14.617701Z"
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          "privilegesRequired": "LOW",
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    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: do not leave a dangling sk pointer in __smc_create()\n\nThanks to commit 4bbd360a5084 (\"socket: Print pf->create() when\nit does not clear sock->sk on failure.\"), syzbot found an issue with AF_SMC:\n\nsmc_create must clear sock->sk on failure, family: 43, type: 1, protocol: 0\n WARNING: CPU: 0 PID: 5827 at net/socket.c:1565 __sock_create+0x96f/0xa30 net/socket.c:1563\nModules linked in:\nCPU: 0 UID: 0 PID: 5827 Comm: syz-executor259 Not tainted 6.12.0-rc6-next-20241106-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024\n RIP: 0010:__sock_create+0x96f/0xa30 net/socket.c:1563\nCode: 03 00 74 08 4c 89 e7 e8 4f 3b 85 f8 49 8b 34 24 48 c7 c7 40 89 0c 8d 8b 54 24 04 8b 4c 24 0c 44 8b 44 24 08 e8 32 78 db f7 90 <0f> 0b 90 90 e9 d3 fd ff ff 89 e9 80 e1 07 fe c1 38 c1 0f 8c ee f7\nRSP: 0018:ffffc90003e4fda0 EFLAGS: 00010246\nRAX: 099c6f938c7f4700 RBX: 1ffffffff1a595fd RCX: ffff888034823c00\nRDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000\nRBP: 00000000ffffffe9 R08: ffffffff81567052 R09: 1ffff920007c9f50\nR10: dffffc0000000000 R11: fffff520007c9f51 R12: ffffffff8d2cafe8\nR13: 1ffffffff1a595fe R14: ffffffff9a789c40 R15: ffff8880764298c0\nFS:  000055557b518380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007fa62ff43225 CR3: 0000000031628000 CR4: 00000000003526f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n  sock_create net/socket.c:1616 [inline]\n  __sys_socket_create net/socket.c:1653 [inline]\n  __sys_socket+0x150/0x3c0 net/socket.c:1700\n  __do_sys_socket net/socket.c:1714 [inline]\n  __se_sys_socket net/socket.c:1712 [inline]\n\nFor reference, see commit 2d859aff775d (\"Merge branch\n'do-not-leave-dangling-sk-pointers-in-pf-create-functions'\")"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/smc: no deje un puntero sk colgando en __smc_create() Gracias a el commit 4bbd360a5084 (\"socket: Imprimir pf-&gt;create() cuando no borra sock-&gt;sk en caso de error.\"), syzbot encontró un problema con AF_SMC: smc_create debe borrar sock-&gt;sk en caso de error, familia: 43, tipo: 1, protocolo: 0 ADVERTENCIA: CPU: 0 PID: 5827 en net/socket.c:1565 __sock_create+0x96f/0xa30 net/socket.c:1563 Módulos vinculados: CPU: 0 UID: 0 PID: 5827 Comm: syz-executor259 No contaminado 6.12.0-rc6-next-20241106-syzkaller #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 13/09/2024 RIP: 0010:__sock_create+0x96f/0xa30 net/socket.c:1563 Código: 03 00 74 08 4c 89 e7 e8 4f 3b 85 f8 49 8b 34 24 48 c7 c7 40 89 0c 8d 8b 54 24 04 8b 4c 24 0c 44 8b 44 24 08 e8 32 78 db f7 90 &lt;0f&gt; 0b 90 90 e9 d3 fd ff ff 89 e9 80 e1 07 fe c1 38 c1 0f 8c ee f7 RSP: 0018:ffffc90003e4fda0 EFLAGS: 00010246 RAX: 099c6f938c7f4700 RBX: 1ffffffff1a595fd RCX: ffff888034823c00 RDX: 0000000000000000 RSI: 000000000000000 RDI: 000000000000000 RBP: 00000000ffffffe9 R08: ffffffff81567052 R09: 1ffff920007c9f50 R10: dffffc0000000000 R11: fffff520007c9f51 R12: ffffffff8d2cafe8 R13: 1ffffffff1a595fe R14: ffffffff9a789c40 R15: ffff8880764298c0 FS: 000055557b518380(0000) GS:ffff8880b860 0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa62ff43225 CR3: 0000000031628000 CR4: 000000000003526f0 DR0: 00000000000000000 DR1: 00000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Seguimiento de llamadas:  sock_create net/socket.c:1616 [en línea] __sys_socket_create net/socket.c:1653 [en línea] __sys_socket+0x150/0x3c0 net/socket.c:1700 __do_sys_socket net/socket.c:1714 [en línea] __se_sys_socket net/socket.c:1712 [en línea] Para referencia, consulte el commit 2d859aff775d (\"Fusionar rama 'do-not-leave-dangling-sk-pointers-in-pf-create-functions'\")"
    }
  ],
  "lastModified": "2026-06-17T08:04:08.810",
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