CVE-2024-49944
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
sctp: set sk_state back to CLOSED if autobind fails in sctp_listen_start
In sctp_listen_start() invoked by sctp_inet_listen(), it should set the sk_state back to CLOSED if sctp_autobind() fails due to whatever reason.
Otherwise, next time when calling sctp_inet_listen(), if sctp_sk(sk)->reuse is already set via setsockopt(SCTP_REUSE_PORT), sctp_sk(sk)->bind_hash will be dereferenced as sk_state is LISTENING, which causes a crash as bind_hash is NULL.
Detalles técnicos trazas, registros y código del informe original
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:sctp_inet_listen+0x7f0/0xa20 net/sctp/socket.c:8617 Call Trace: <TASK> __sys_listen_socket net/socket.c:1883 [inline] __sys_listen+0x1b7/0x230 net/socket.c:1894 __do_sys_listen net/socket.c:1902 [inline]
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.28%
- Percentil entre todas las CVEs puntuadas: 18
- Fecha de la puntuación: 5/10/2026
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).
Tecnologías afectadas (1)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/0e4e2e60556c6ed00e8450b720f106a268d23062
- https://git.kernel.org/stable/c/7f64cb5b4d8c872296eda0fdce3bcf099eec7aa7
- https://git.kernel.org/stable/c/89bbead9d897c77d0b566349c8643030ff2abeba
- https://git.kernel.org/stable/c/8beee4d8dee76b67c75dc91fd8185d91e845c160
- https://git.kernel.org/stable/c/9230a59eda0878d7ecaa901d876aec76f57bd455
- https://git.kernel.org/stable/c/dd70c8a89ef99c3d53127fe19e51ef47c3f860fa
- https://git.kernel.org/stable/c/e7a8442195e8ebd97df467ce4742980ab57edcce
- https://git.kernel.org/stable/c/e914bf68dab88815a7ae7b7a3a5e8913c8ff14a5
- https://git.kernel.org/stable/c/f032e1dac30b3376c7d6026fb01a8c403c47a80d
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html
JSON original (NVD)
Mostrar
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"descriptions": [
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: set sk_state back to CLOSED if autobind fails in sctp_listen_start\n\nIn sctp_listen_start() invoked by sctp_inet_listen(), it should set the\nsk_state back to CLOSED if sctp_autobind() fails due to whatever reason.\n\nOtherwise, next time when calling sctp_inet_listen(), if sctp_sk(sk)->reuse\nis already set via setsockopt(SCTP_REUSE_PORT), sctp_sk(sk)->bind_hash will\nbe dereferenced as sk_state is LISTENING, which causes a crash as bind_hash\nis NULL.\n\n KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n RIP: 0010:sctp_inet_listen+0x7f0/0xa20 net/sctp/socket.c:8617\n Call Trace:\n <TASK>\n __sys_listen_socket net/socket.c:1883 [inline]\n __sys_listen+0x1b7/0x230 net/socket.c:1894\n __do_sys_listen net/socket.c:1902 [inline]"
},
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"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sctp: volver a establecer sk_state en CERRADO si fallo la vinculación automática en sctp_listen_start En sctp_listen_start() invocado por sctp_inet_listen(), debería volver a establecer sk_state en CERRADO si sctp_autobind() falla por cualquier motivo. De lo contrario, la próxima vez que se llame a sctp_inet_listen(), si sctp_sk(sk)->reuse ya está establecido mediante setsockopt(SCTP_REUSE_PORT), sctp_sk(sk)->bind_hash se desreferenciará ya que sk_state está ESCUCHANDO, lo que provoca un bloqueo ya que bind_hash es NULL. KASAN: null-ptr-deref en el rango [0x0000000000000000-0x0000000000000007] RIP: 0010:sctp_inet_listen+0x7f0/0xa20 net/sctp/socket.c:8617 Seguimiento de llamadas: __sys_listen_socket net/socket.c:1883 [en línea] __sys_listen+0x1b7/0x230 net/socket.c:1894 __do_sys_listen net/socket.c:1902 [en línea]"
}
],
"lastModified": "2026-06-17T08:00:47.270",
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