CVE-2023-53590
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
sctp: add a refcnt in sctp_stream_priorities to avoid a nested loop
With this refcnt added in sctp_stream_priorities, we don't need to traverse all streams to check if the prio is used by other streams when freeing one stream's prio in sctp_sched_prio_free_sid(). This can avoid a nested loop (up to 65535 * 65535), which may cause a stuck as Ying reported:
Note that it doesn't need to use refcount_t type for this counter, as its accessing is always protected under the sock lock.
v1->v2: - add a check in sctp_sched_prio_set to avoid the possible prio_head refcnt overflow.
Detalles técnicos trazas, registros y código del informe original
watchdog: BUG: soft lockup - CPU#23 stuck for 26s! [ksoftirqd/23:136]
Call Trace:
<TASK>
sctp_sched_prio_free_sid+0xab/0x100 [sctp]
sctp_stream_free_ext+0x64/0xa0 [sctp]
sctp_stream_free+0x31/0x50 [sctp]
sctp_association_free+0xa5/0x200 [sctp]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: 0.12%
- Percentil entre todas las CVEs puntuadas: 2
- 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).
Tecnologías afectadas (1)
CWE
- CWE-667
Referencias
- https://git.kernel.org/stable/c/03c3a5584a0a29821e59b7834635ce823050caaa
- https://git.kernel.org/stable/c/68ba44639537de6f91fe32783766322d41848127
- https://git.kernel.org/stable/c/6d529928ea212127851a2df8c40d822237ca946b
- https://git.kernel.org/stable/c/8ee401f89cdb10f39098c0656d695b2bc4052100
- https://git.kernel.org/stable/c/bf5540cbd20e2dae2c81ab9b31deef41ef147d0a
- https://git.kernel.org/stable/c/cec326443f01283ef68ea00c06ea073b1835a562
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: add a refcnt in sctp_stream_priorities to avoid a nested loop\n\nWith this refcnt added in sctp_stream_priorities, we don't need to\ntraverse all streams to check if the prio is used by other streams\nwhen freeing one stream's prio in sctp_sched_prio_free_sid(). This\ncan avoid a nested loop (up to 65535 * 65535), which may cause a\nstuck as Ying reported:\n\n watchdog: BUG: soft lockup - CPU#23 stuck for 26s! [ksoftirqd/23:136]\n Call Trace:\n <TASK>\n sctp_sched_prio_free_sid+0xab/0x100 [sctp]\n sctp_stream_free_ext+0x64/0xa0 [sctp]\n sctp_stream_free+0x31/0x50 [sctp]\n sctp_association_free+0xa5/0x200 [sctp]\n\nNote that it doesn't need to use refcount_t type for this counter,\nas its accessing is always protected under the sock lock.\n\nv1->v2:\n - add a check in sctp_sched_prio_set to avoid the possible prio_head\n refcnt overflow."
}
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